CN103348830B

CN103348830B - Plant type modified sandy soil is utilized to administer the method for sand ground

Info

Publication number: CN103348830B
Application number: CN201310223389.1A
Authority: CN
Inventors: 易志坚; 杨庆国; 马银华; 何小兵; 赵朝华; 谷建义; 曹顺发
Original assignee: Individual
Current assignee: All Things Shagu Chongqing Ecological Technology Co ltd; Yi Zhijian
Priority date: 2013-06-06
Filing date: 2013-06-06
Publication date: 2016-03-23
Anticipated expiration: 2033-06-06
Also published as: CN103348830A

Abstract

The present invention discloses a kind of method utilizing plant type modified sandy soil to administer sand ground, plant type modified sandy soil is paved in plan Desert Control surface, this modified sandy soil by can water-soluble solid organic materials water-soluble formed there is cohesiveness and adhering solution and plant seed, husky mix after formed; After moisture evaporation, can bond sandy soil particle and meeting of solid matter wherein again can be dissolved in the water after water and be formed and have cohesiveness and adhering solution and adhesion sandy soil particle, the invention enables general sandy soil " soil ", fundamentally change the interaction relationship between sandy soil particle, form the pellet pores structure with adhesion (cohesive strength); Simultaneously, material is difficult to run off because of its cohesiveness and adhering feature, makes sandy soil possess the performance of stable and storage moisture as soil, nutrient, can direct growth plant after blending plant seed, can provide solid condition for the growth of plant, be the measure of desirable Desert Control.

Description

Plant type modified sandy soil is utilized to administer the method for sand ground

Technical field

The present invention relates to Sandy Soil Resources to utilize and desertification improvement field, particularly a kind of utilization has the method for the modified sandy soil improvement sand ground of earth characteristic.

Background technology

Sandy soil refer to containing husky a lot of soil.The soil is porous for sandy soil, and water-permeable and air permeable is good, but preserve moisture and fertility ability, need improvement when cultivating.The not too suitable certain plants growth of sandy soil, when silt content is very large, is similar to the character of desert or top layer, Desertification sand or the soil that desertifies; Sandy soil are except naturally existing, and more is formed by desertification.

(1) desertization and harm thereof

Desertization is the great environmental problem that face of mankind nowadays is the severeest.

Whole world land surface is 1.62 hundred million square kilometres, take up an area 30.3% of the ball gross area, wherein about 1/3 (4,800 ten thousand square kilometres) are arid, semiarid Desert Area, and expanding with the speed of 4 ~ 60,000 square kilometres every year, the threat of desertization that has the soil of 43% to be faced with.

China is in the world by one of country of husky and desertization serious harm.The numeral that China national State Forestry Administration, P.R. China announced in 2011, national sandy land area 1,730,000 square kilometres, accounts for 18% of territory total area, and wherein desert area has 80.89 ten thousand square kilometres, accounts for 8.4% of area.

Harm in Desertification Process comprises stream and sand dune reach causes farmland covering, and river, reservoir, water channel block, and highway is buried, also make whole environmental degradation, loss of land resource, and the related regional economy caused is slow, the society of society's instability etc., economic problems.

Desertization directly causes the land resources of the preciousness that can directly utilize sharply to reduce.Desertization directly causes land deterioration, and soil structure destroys, the nutrient loss of soil, and these recoveries need many decades, centuries, even thousands of year.The deterioration of grasslands that desertization causes, the advantage grass seeds being suitable for livestock edible is reduced gradually, even completely loses, herbage becomes short, sparse, and output obviously reduces, and grassland capacity for raising livestock on the grasslands greatly declines.Desertization causes river, reservoir, water channel to block, and such as, the average annual sediment transport in the Yellow River 1,600,000,000 tons, wherein just has 1,200,000,000 tons from Desertification.Desertization causes railway bed, bridge, culvert to damage in some areas, makes highway subgrade, road surface sand, forces highway communication to be interrupted, and even makes highway discard.Because dust storm is pressed hard, thousands of herdsman is forced to move to alien land, becomes " eco-refugee ".The data display that China national State Forestry Administration, P.R. China provides, 20 end of the centurys, desertify every year with the speed expanded of 3436 square kilometres, within every 5 years, just have an area being equivalent to Beijing's administrative division size to lose value because of desertification, the population that the whole nation affects by desertization reaches 1.7 hundred million.Desertification of land, desertification not only worsen ecotope, and decline productivity of land, threatens rivers safety, and aggravate the poverty of husky district.

Desertization causes the ecosystem and natural environment deterioration, and natural calamity takes place frequently, and is one of disaster the most serious of facing mankind.Natural, ecological is the integral framework that a various factors restricts mutually, by the poised state kept relative stability according to certain rule.Desertization changes the physical features on earth's surface, land greatly, destroy Radiation budget balance, bring out weather and environmental change, cause the water and soil loss of Desertification more serious, green vegetation sharply reduces, ecotope sharply worsens, and rare animals and plants disappear or extinction, and diversity of organism suffers serious destruction.After climatic anomaly and the ecosystem are destroyed, cause the speed of desertization to be aggravated, both form vicious circle, are degrading natural environment further, make the people of Desertification lose the basis of depending on for existence, and cause the natural calamity in area.According to monitoring, if China urban air pollution owner finely ground particles, this and desertization are closely related.Dust pollution the productive life environment of the wide geographic area people, and sandstorm is frequent, have impact on people ' s health.

The seriousness of Deserts in China is also that the population statistics involved is huge, and it directly or indirectly affects the life (account for the whole world and perplex 40% of population by desert and desertification) of nearly 400,000,000 people.The direct economic loss about 64,200,000,000 yuan of China's desertification harm is annual, and the indirect economic loss about 2,889 hundred million yuan that desertification and derivative harm thereof cause is annual.If without effectively preventing countermeasure, be in the big cities such as the Urumchi of desert band, Lanzhou, Xi'an, Yinchuan, Taiyuan, Huhehaote, Beijing, Tianjin, eventually can become city, desert one by one, large quantities of common people will become eco-refugee.

(2) measure of desert treatment and achievement

Desertification Control is substantially identical with control of desert mode, and fundamental way is the character according to hazards of sand storms, takes various technical measures, weaken the wind speed of near surface formation, reduce the sediment discharge in air-flow, delay or stop sand dune to move forward, to reach the object weakening or avoid hazards of sand storms.For a long time, the measure of harm (sand control) that prevent and control sandy storm, Chinese scholars is summarized as engineering sand control (machinery) measure, controlling sediment by plant measure and chemical sand control measure three major types it.Controlling sediment by plant measure and engineering sand control measure belong to reduction wind speed, and weaken stream intensity, chemical sand-fixing is then consolidation Shamian Island, control Shamian Island wind erosion process development.

Vegetative sand control is also called sand consolidation with biologic, is by the means such as fencing and serike, reaches control desert, stablizes oasis, improve a kind of technical measures of husky district environmental quality and productive potential.Vegetative sand control why can tackling quicksand, and one is because psammophytes has flourishing root system, can the sandy soil particle of consolidation around it, in addition the accumulation of dry branches and fallen leaves, is conducive to organic gathering after rotting, impels the pedogenesis of sandy soil, change sand ground character, make drift sand tend to stable; Two is due to after serike on sand dune, adds the roughness on earth's surface, thus also just adds the resistance to wind, reduces wind speed, weakens and inhibits stream movable.

The main method of vegetative sand control comprises: (1) envelope sand-base cultivation grass, protection natural vegetation; (2) afforestation is fixed the sand; (3) desert edge wind prevention and sand resistance forest belt is built; (4) the inner shelter belts of protect farmland net in oasis is built.

Vegetative sand control can improve the ecological condition in the husky territory of vegetative coverage, promotes that sandy plant community develops to good direction, forms the stable ecosystem, is conducive to increasing bio-diversity.

But, sandy soil local climate arid, cold and hot drastic change, wind great Sha is many, natural environment is very harsh, be not suitable for the growth of plant generally, therefore, the effect of vegetative sand control is subject to the restriction of sandy soil characteristic and natural environment, particularly under the condition without irrigation, as the time arid especially, due to water deficient, plant undergrowth or the mortality of plantation can be made.

Sand-prevention engineering measure utilizes weeds, crotch, cob wall or structure etc., drift sand established air partition or covers Shamian Island, preventing Sand Movement.Engineering sand control measure has fast feature of producing effects, but the protection phase is short, is therefore often applicable to the area in the traffic lines of drift sand serious harm, important industrial and mineral base, farmland and residential area, and adopts for during the growth of protection sand-fixation plant.Main method has: hinder husky fence (high vertical sand barrier), and mechanical sand barrier (establishing checked sand hinder straws), clay fix the sand soil, the husky engineering of transporting (type such as lower wind-guiding, feather row and sediment transport section).

The mechanical function principle of engineering control measure is all the resistance of motion by increasing stream, retardance energy dissipating, make it slow down and impel the deposition of sandy soil particle, be a kind of provisional sand proof measure, for the harm of sandy soil, only play the effect of " controlling table " fixed the sand.

Chemical sand-fixing be active dune () upper spray chemical bonding material, cover layer is formed on drift sand surface, or infiltrate in the sand of top layer, loose sand material bonding is got up to be formed bonding course (duricrust), thus prevent wind-force from raising blowing of sand material and carrying, reach tackling quicksand, prevent and treat the object of sand damage.Chemical sand-fixing is generally used for the area that hazards of sand storms causes heavy economic losses, (as airport, traffic lines (railway, highway), military installations and important industrial and mining area), and normal and vegetative sand control matches, as the complementary of vegetative sand control and transitional arrangement.

The effect of chemical sand-fixing effect, not only relevant with the character (as chemical composition, mechanical composition) of drift sand surface particles, and also relevant with physico chemical property (as molecular structure, molecular size, viscosity, absorption affinity) of chemical sand fixing material itself etc.Chemical sand fixing material conventional as asphalt emulsion, oily Ye Yan ore deposit liquid, synthetic resin, synthetic rubber etc., also can use some natural organic matters, as brown coal, peat, municipal refuse refuse, resin etc.

Asphalt emulsion is that our times various countries to be applied in chemical sand-fixing engineering material the most widely.But emulsified asphalt in use yet exists because the asphalitine in pitch and resin are easy to by destructions such as the oxygen in air, light, heat, moisture and microorganisms, oil content declines.The aggravation gradually of this change, causes asphalt performance to degenerate, and as softening point rising, needle penetration declines, and ductility reduces, and causes unity layer slowly to become fragile, harden, and loses plasticity, occurs aging, so that finally ftractures and destroyed by wind sapping, loses sand fixation.

(3) the basic difficulty of desert treatment and Problems existing

The improvement of sandy soil is identical with aforementioned control of desert mode, and dreamboat is, sandy soil can either be made to stablize, again can growing plant, namely makes " sandy soil large area becomes oasis ".But the particle in sandy soil is discrete particle, the basic difficulty of improvement is, the particle in sandy soil easily moves, be difficult to water conservation and store nutrient.Comprehensively current sand control measure, people are not difficult to find, existing sandy soil and desert control method far away fundamentally the particle solved in sandy soil easily move, be difficult to water conservation retaining and store this two hang-up of nutrient.

Existing sandy soil administering method is identical with desert control method, to fix the sand, no matter adopt engineering (machinery) measure, plant measures and chemical measure, it is not from the attribute improving sandy soil itself, only avoid the harm that the movement of sandy soil causes, therefore from its method and mode, still belong to passive sand control, Desertification can be overcome to a certain extent or within short-term, but be difficult to fundamentally to solve the difficult problem that sandy soil are difficult to water conservation retaining and are difficult to store nutrient, " sandy soil change oasis " that distance people wish still has larger distance.

1. engineering (machinery) measure temporarily can change the physical aspect (natural existing way) of desert or sandy soil existence, it is a kind of provisional measures for sand prevention, for the harm of drift sand, sandy soil, only play the effect of " controlling table " fixed the sand, sandy soil are tamed by of short duration, cannot reach the effect of " effecting a permanent cure ", after long-time, sandy soil still can recover its true colours.

2. chemical sand-fixing is the surface adopting sand-consolidating agent to be sprayed on sandy soil or desert, and to reach the object of fixing the sand, sand-consolidating agent retrains sandy soil surface particles, forms one stablize containment vessel at sandy soil particle surface, and then sandy soil are stablized, and does not flow.But, chemical sand-fixing materials often adopts spray method to be formed, only can form constraint in the scope of husky body, sandy soil very thin surface, the constraint that surface is formed is once destroyed, to be difficult to recover, and chemical substance weather resistance determines its sand control can only the flowing of temporarily shutoff sandy soil, and can not reach the object of long-term stability, its cost drops into high.

The earliest, spray the sand-consolidating agent emulsified asphalt often adopted, after sprinkling, sand dune surface skining average thickness little (usual 2 ~ 3cm), after using the several years (usual 3 ~ 5 years), bonding course starts fragmentation; Meanwhile, the emulsified bituminous materials of sprinkling is unfavorable to environment, and itself is not the nutrient component of plant growth, and therefore its effect is only fixed the sand; Asphalt material aging is poor in addition, will not have sand fixation after break inactivation.

At present, people have developed many macromolecular sand-fixation agents, after sprinkling, and sandy soil surface skining thickness thin (being generally 0.2 ~ 0.5cm), surface retains few, and cracking often appears in dry rear surface; Meanwhile, sand-consolidating agent generally needs certain hour consolidation, is difficult to meet aqueous dispersion or dissolving again after consolidation after spraying, its water retention mainly by closing the part hole on top layer, part blocks underground evaporation of water and realizing, its material itself there is no water retention; Further, cortex itself does not have moisture capacity, thus can not protect containing nutrient, can not adapt to the generally growth of plant.So, the feature of sand-consolidating agent and fix the sand its long-term behaviour of fixing the sand of structures shape of layer and be difficult to obtain basic assurance.

3. the applicable elements of vegetative sand control is usually subject to weather and environmental limit

Vegetative sand control utilizes plant top to hinder husky, sand, the root of plant is utilized to fix the sand, micro climate and micro-soil environment can be changed to a certain extent, but, the basic difficulty of vegetative sand control is that sandy soil itself are unfavorable for plant growth, as unstable in sandy soil and wind-driven sediment is frequent, sandy soil are barren, water deficient and be difficult to water conservation, temperature adjustment etc. and all plant had a negative impact.

Wind-driven sediment can make the harm that plant is subject to deflation, sand buries, sand cuts, wind-driven sediment can solve with engineering protection measure and chemical sand-fixing, but Sandy Soil Moisture is not enough and be difficult to the basic difficult problem of water conservation retaining, the applicability that traditional plant is fixed the sand receives very big restriction.

In sum, expect to obtain a kind of sandy soil control measures, even if sandy soil have the same stability of soil, moisture capacity, gas permeability have and store the function of nutrient, namely, make sandy soil " soil ", fundamentally solve the difficult problem that sandy soil easily moved, and be difficult to water conservation retaining and stored nutrient, make its plant growth preferably, and then fundamentally improve the form of sandy soil and carry out sandy soil improvement.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of method utilizing plant type modified sandy soil to administer sand ground, the modified sandy soil containing plant seed is utilized to pave in sandy land surface, sandy soil are made to have the same stability of soil, moisture capacity, gas permeability have and store the function of nutrient, namely, make sandy soil " soil ", fundamentally solve the difficult problem that sandy soil easily moved, and be difficult to water conservation retaining and stored nutrient, and directly can growing plant, cost-saving, raise the efficiency, and then fundamentally improve the form of sandy soil and carry out plant on sand land.。

The method utilizing plant type modified sandy soil to administer sand ground of the present invention, comprises the following steps:

A. modified sandy soil is prepared:

A1. get the water-soluble solid organic materials of energy and be dissolved in the water, being formed and there is cohesiveness and adhering solution;

A2. by the solution of step a1 gained and sandy soil, plant seed mix evenly after namely form plant type modified sandy soil; Or, by the solution of step a1 gained and sandy soil mix evenly after namely form modified sandy soil, and plant seed is doped in modified sandy soil;

Described have after cohesiveness and adhering solution and sandy soil mix can adhesion sandy soil particle, and the modified sandy soil of formation is pellet pores structure; The described moisture had in cohesiveness and adhering solution can with solution adheres between sandy soil particle; After the described moisture evaporation had in cohesiveness and adhering solution, the water-soluble solid organic materials of energy wherein again can be dissolved in the water after meeting water and be formed and have cohesiveness and adhering solution and adhesion sandy soil particle;

B. pave the plant type modified sandy soil prepared by step a the surface selected in sand ground.

The invention also discloses a kind of method utilizing plant type modified sandy soil to administer sand ground, comprise the following steps:

A. modified sandy soil is prepared:

A1. the solid organic materials that plant seed, sandy soil, water and energy are water-soluble is got;

A2. by the plant seed in step a1, sandy soil, water and can water-soluble solid organic materials mix in any order and mix evenly after namely form plant type modified sandy soil;

The water-soluble solid organic materials of described energy is dissolved in the water and is formed and has cohesiveness and adhering solution and adhesion sandy soil particle, and the modified sandy soil of formation is pellet pores structure; The described moisture had in cohesiveness and adhering solution can with solution adheres between sandy soil particle; After the described moisture evaporation had in cohesiveness and adhering solution, the water-soluble solid organic materials of energy wherein again can be dissolved in the water after meeting water and be formed and have cohesiveness and adhering solution and adhesion sandy soil particle;

B. pave the modified sandy soil prepared by step a the surface selected in sand ground.

Further, in step b, paving thickness is greater than 5cm;

Further, in step a, in described modified sandy soil, be also mixed with the nutriment for plant growth;

Further, after having the water evaporation in cohesiveness and adhesiveness solution between the sandy soil particle of modified sandy soil, substance wherein by sandy soil particle bond together; After the described water evaporation had in cohesiveness and adhesiveness solution, the weight ratio between the solid organic materials that energy is wherein water-soluble and sandy soil is 1:30-8000; Between the sandy soil particle of modified sandy soil, there is interconnected pore and dead-end pore;

Further, in step a1, the water-soluble solid organic materials of described energy comprises one or both and above mixture in natural polymer and modified material thereof and synthetic high polymer matter;

Further, in step a1, also add one or both and the above mixture in the natural polymer that can be scattered in described solution and modified material thereof and synthetic high polymer matter;

Further, in step a2, also add one or both and the above mixture in organic pluronic polymer, Small molecular auxiliary agent, surfactant inorganic active powder or powder material, inorganic inactive powder or powder material, solid substance and pH value Auto-regulator;

Further, the solid organic materials that described energy is water-soluble is one or both and above mixing in polyvinyl alcohol, polyethylene glycol oxide, polyethylene glycol, Sodium Polyacrylate, sodium carboxymethylcellulose, hydroxypropyl methylcellulose and cellulose ether or copolymer.

Beneficial effect of the present invention: the plant type modified sandy soil that utilizes of the present invention administers the method for sand ground, directly paves in sandy soil surface by the modified sandy soil with plant seed, because modified sandy soil has the characteristic being similar to soil, and thus directly can growing plant; Such as from stability, between soil particle time wet, both there is certain adhesion, the change of particle arrangement can occur again, so soil time wet presents viscoelastroplasticity character to a certain extent; And node between soil particle time dry is restrained, the restrained power of arrangement between particle is fixed, so soil when doing presents certain solid property, therefore, soil when no matter being wet or dry time soil, namely modified sandy soil of the present invention has this mechanical stability; From moisture capacity, storage is nourished one's nature can, can store moisture, nutrient and air between soil particle, and moisture can also be absorbed again after moisture evaporation, and namely the modified sandy soil of the application has water conservation retaining and the characteristic of storage nutrient, after adding seed, be suitable for various plants growth.

Modified sandy soil of the present invention makes general sandy soil " soil ", fundamentally change the interaction relationship between sandy soil particle, form and there is the pellet pores structure of adhesion (cohesive strength), make sandy soil possess the performance of stable and storage moisture as soil, nutrient; Obtain sandy soil modification can absorbing moisture, store moisture, nutrient and air and have the modified sandy soil of certain mechanical stability, can provide the solid condition of growth for plant, be the measure of desirable improvement sandy soil; Meanwhile, modified sandy soil also can be used as the means of husky resource utilizing sandy beach, sand ground, carries out planting.

Compare with the sandy soil control measures of prior art, the present patent application has the following advantages:

1. compared with fixing the sand with engineering

Engineering Sand-fixing Measures changes the roughness of drift sand formation, sandy land surface, does not improve structure composition and the way of restraint of sandy soil self, only plays the effect that physics improves.The present invention improves the particle composition rule of sandy soil by bonding material, while the way of restraint improving sandy soil particle, its structure is made to have the function of water conservation, retaining, maintenance nutrient, namely, make sandy soil " soil ", this modified sandy soil is more suitable for plant growth.

2. compared with chemical sand-fixing method

The present invention is embodied in many aspects from the different of chemical sand-fixing.

First, present invention achieves " soil " of sandy soil, the method realized with chemical sand-fixing and effect have fundamental difference.

The present invention adopts will be had water conservation, bonding and store the constraint materials of effect such as nutrient function and the method for sandy soil mix, its effect can realize " soil " of sandy soil, and each Plants can be planted, and chemical sand-fixing is only by the method for surface spraying chemical sand-fixing materials, its effect only can realize the consolidation of surperficial sandy soil, prevents the movement of sandy soil.The constraint material that the present invention adopts and sandy soil under certain condition mix form modified sandy soil, the modified sandy soil formed has moisture capacity, function is supported in storage, and the modified sandy soil that the constraint material that the present invention adopts is formed all has good stability in dry, wet two states, the constraint of formation can reconfigure according to the change of dry and wet state, change.The present invention is the overall constraint system changing sandy soil, and the constraint system only strengthening sandy soil surface is essentially different.The sandy soil of sandy soil surface 3 ~ 50cm, for transforming sandy soil, can be made into modified sandy soil, and then sandy soil are not easily flowed, possess moisture and the nutrient of plant growth indispensability simultaneously, reach the object of basic sand control soil by the present invention.Chemical sand-fixing measure is passed through at sandy soil surface sprinkling chemical sand-fixing materials, strengthened by the constraint of infiltration (penetration depth is generally less than 3cm) the effects on surface sandy soil of sand-consolidating agent, only change the way of restraint on sandy soil surface, its degree of depth is general more shallow, its constraint has irrecoverability, comparatively large on the impact of natural environment, ordinary disbursements is high.The effect of cured layer itself is single, can only provide consolidation, not have water conservation, water storage, and the function of nutrient.

The intensity mechanism fundamental difference of the present invention and chemical sand-fixing.

Chemical sand-fixing is the consolidation by realizing surperficial sandy soil at sandy soil surface sprinkling chemical consolidation material, in order to play the effect of the overall sandy soil of consolidation, surface sandy soil requirement of strength is higher, compression strength even really will could prevent destruction and the movement of sandy soil more than 1MPa, the present invention is then within the scope of certain thickness, by sandy soil with there is bonding, the constraint material mixing of water retaining function, realize the constraint each other of overall sandy soil, prevent the movement of sandy soil, how strong the constraint of sandy soil reality do not need, this point can carry out analogy from soil, from test, after adopting the present invention, sandy soil in a way, achieve " soil ", although by regulating constraint material type and consumption, can the surperficial consolidation strength of sandy soil be accomplished enough high completely, but test and analysis show, the surperficial compression strength of sandy soil can play the effect of stable sand in very little scope, chemical sand-fixing effect can be reached, achieve again " soil " of sandy soil within the scope of certain thickness, get final product planting plants simultaneously, realize fixing the sand again soil and eucyclic object.

Compared with chemical sand-fixing, the present invention also has the restorability of destruction.

The performance of the constraint material that the present invention adopts determines the feature of the restorability of the destruction of modification sand, the constraint material that the present invention adopts is dissolvable in water in water, after liquid object after dissolving and sandy soil mix form modified sandy soil, moisture is wherein difficult to lose, even if after loss of water, if meet water again, constraint material can be dissolved in the water again, again the modified sandy soil done equally is formed, and this process can infinitely repeatedly, therefore the modified sandy soil that the present invention is formed has the restorability of destruction, but chemical sand-fixing is then completely different, the material behavior that chemical sand-fixing adopts determines the irrecoverability of destruction, chemical sand-fixing is in order to ensure surperficial sandy soil consolidation, normal employing intensity is higher and have the sand fixation material of reversal properties, but surface strength is once destroy, cannot recover again on the original basis, only have again sprayed on material to recur and arrive consolidation, otherwise after surperficial sandy soil destroy, sandy soil below it are exposed to surface again, along with time integral, original effect of fixing the sand will progressively be lost, fixing the sand object and effect just cannot ensure.

As can be seen here, the present invention fixes the sand native method by method and the infiltration by chemical sand-fixing materials that mix makes modified sandy soil is different in itself.

3. compared with vegetative sand control method

The fundamental difference of the present invention and vegetative sand control is, vegetative sand control can only " be taken stopgap measures ", and the present invention fundamentally changes sandy soil character, realizes sandy soil " soil ", thus the vegetative sand control realized truly, therefore the present invention is only arranging of " effecting a permanent cure " of sandy soil improvement.

Vegetative sand control utilizes vegetation rhizome the mode that sandy soil retrain to be played to the effect fixed the sand, but sandy soil self property is also not suitable for plant growth, moisture easily runs off, sandy soil also cannot be stablized, under wind effect, sandy soil move frequently, plant is difficult to growth, even if short-term plant growth, in the presence of a harsh environment, if moisture can not effectively be preserved, plant is also difficult to continued growth, even withered, therefore the effect of vegetative sand control is not only subject to the restriction of local climate condition, is also difficult to realize its effect fixed the sand for a long time.The present invention then has fundamental difference with vegetative sand control.The present invention is the basic point from vegetative sand control, namely the performance improvement of sandy soil is started with, realize " soil " of sandy soil, not only there is the effect of stable sand, also make sandy soil have the function of water conservation, retaining, storage nutrient, sandy soil the are possessed condition of plant growth, achieve the condition of the stable of sandy soil and plant growth, planting also could really realize, and therefore from certain angle, the present invention is only the vegetative sand control of real meaning.

In order to contrast the effect of the present invention and vegetative sand control, the present invention has also carried out comparative trial.Sodium carboxymethylcellulose is taked to have bonding as in modified sandy soil by method of the present invention, the material of water retention, form modified sandy soil thus, by making while of modified sandy soil and moistening common sandy soil in outdoor crushed stone, placement thickness is 15cm, and the surface difference multiple vegetable seed of spreading and grass-seed, after 1 day, common sandy soil become dry, modified sandy soil still keeps wetting state behind some skies, and under the prerequisite of not watering, the grass-seed on modified sandy soil surface and vegetable seed germinate, but wither again after the grass-seed on common sandy soil surface and vegetable seed germinate and thirst, within interval 10-30 days, once water after the plant that modified sandy soil is planted and can meet the water demand of plant, sapling on modified sandy soil grew up through 2 years, about two meters are reached, the tomato that modified sandy soil is planted and dish seedling can normally eat, suitable with planting plants growing way in soil.Plant after 1 year, root system of plant is by sandy soil connection for netted, and the outward appearance of soil, character is all without peculiar, and the plant that former years rot can be described as nutrient again, sandy soil are stablized further, and the plantation of modified sandy soil forms benign cycle, sand fixation is also really feasible, economical, and also making sandy soil become fertile soil becomes possibility.

4. compared with other method: as water-absorbing resins

Super absorbent resin is containing strongly hydrophilic group, usually has the macromolecular material of certain degree of cross linking.Water insoluble and the organic solvent of super absorbent resin, water absorbing capacity is generally the hundreds of of own wt to several thousand times.Swelling after the water suction of this material is hydrogel, and after pressurized, water is also not easily extruded; After resin drying, can repeated multiple timesly absorb water, its moisture overwhelming majority absorbed can slow releasing, utilizes for plant absorption.

The constraint material that super absorbent resin and the present invention adopt has essential distinction.Constraint material of the present invention has cohesiveness and adhesiveness, has water-soluble, relies on the cohesiveness of constraint material and adhesiveness and sandy soil to be formed and retrains.This constraint can present different character along with dry, wet change, and constraint also can reconfigure.

5. the present invention has significant economy, exploitativeness and the feature of environmental protection.

First, the modified sandy soil that the present invention is formed is compared with existing sand fixing technology, and its disposable investment construction cost has certain economic benefit.The constraint material that the present invention adopts can form the modified sandy soil met the demands under the condition that volume is minimum, can comprise one or both and above mixture in natural polymer and modification solid matter thereof and synthesis macromolecule solid matter by water-soluble solid organic materials as taked some; As: one or both and above mixing in polyvinyl alcohol, polyethylene glycol oxide, polyethylene glycol, Sodium Polyacrylate, sodium carboxymethylcellulose, hydroxypropyl methylcellulose and cellulose ether or copolymer, constraint material only accounts for a few one thousandth of sandy soil part by weight, and material is conventional chemical materials, material cost is also lower, therefore material cost is also lower in principle, and construction method is also comparatively simple, only adopt the common process such as stirring, machinery, labour cost are also lower, and therefore comprehensive method of investment cost will have considerable economy.For sodium carboxymethylcellulose, add 20kg sodium carboxymethylcellulose material in 1 cubic meter of water, market unit price is 10 yuan/kg; Correctability sandy soil about 4 cubic metres, consider artificial, machine cost 100 yuan, then modified sandy soil 1 cubic metre, cost is 75 yuan, be layed in sandy land surface by 10cm, 1 cubic metre of modified sandy soil can lay 10 square metres, then modified sandy soil administers the disposable input cost of sand ground is 7.5 yuan/square metre.

Secondly, different from conventional tune fixing method, the modified sandy soil that the present invention is formed has recyclability, after an investment construction, modified sandy soil can plant each Plants, the husky body of modification, sandy soil can stablize root system of plant, and the root system of plant stabilized sand body, sandy soil conversely, and the rhizome, leaf etc. that rot can be used as again nutrient, for sandy soil transformation forms benign cycle, sandy soil, by really becoming available class land resources, have the advantages that once invest long-term gain, therefore its indirectly economy by inestimable.

Exploitativeness of the present invention is stronger.The present invention adopts material to be existing chemical industry common used material, as polyvinyl alcohol, polyethylene glycol oxide, polyethylene glycol, Sodium Polyacrylate, sodium carboxymethylcellulose, hydroxypropyl methylcellulose and cellulose ether are the conventional thickening material of chemical industry, production method is simple, feasible, cost is lower, the construction method of the present invention's employing is simple in addition, master operation is point be spread on the preparation of sandy soil solution and the mix of modified sandy soil, and therefore the present invention is easy to grasp, and implementation is stronger.

The present invention also has the feature of environmental protection, and constraint material of the present invention, can adopt the material being rich in nutrition, and the growth that itself can be plant provides necessary nutrient, also can add the necessary nutrient of plant growth wherein.The present invention can reconfigure the constraint of sandy soil according to sandy soil dry wet, change, and has restorability.Constraint material of the present invention adopts conventional material, and such as sodium carboxymethylcellulose, itself be also food additives, environmentally safe, expense is low, easy to implement.

In summary it can be seen, the technical measures of present patent application achieve sandy soil earth from principle, and fundamentally can play the effect of sand control soil, certainly, modified sandy soil also can be used for control of desert.

Embodiment

Modified sandy soil of the present invention, the method utilizing plant type modified sandy soil to administer sand ground of the present invention, comprises the following steps:

Comprise the following steps:

A. modified sandy soil is prepared:

The present invention also can adopt another kind to utilize plant type modified sandy soil to administer the method for sand ground, is only sandy soil, water and can selects different hybrid modes by water-soluble solid organic materials from the difference of said method; Specifically comprise the following steps:

A. modified sandy soil is prepared:

Modified sandy soil in two kinds of methods does not have essential distinction, and regardless of order by merging, the final material had in cohesiveness and adhering solution formed has thickening property and water-soluble, could obtain cohesiveness and adhering solution, realize goal of the invention; The modified sandy soil that General Requirements is formed after having cohesiveness and adhering solution and sandy soil (order by merging is not limit) mix has the feature of plastically deformable or forms rarer state and have plasticity after moisture evaporation.

In the present embodiment, in step b, paving thickness is greater than 5cm; There is enough intensity to be applicable to plant on sand land.

In the present embodiment, in step a, in described modified sandy soil, be also mixed with the nutriment for plant growth; Nutrient for plant growth comprise prior art agriculturally, desert, plant on sand land, the field such as greening, be applicable to all nutrients of plant growth; Certainly, according to floristic difference, different nutrients can be added.Such as: fertilizer, inorganic fertilizer and composite organic-inorganic fertilizer, as the binary compound fertilizer and N P and K Nitrogen, Phosphorus and Potassium etc. of compoiste fertilizer, nitrogenous fertilizer, phosphate fertilizer and potash fertilizer or two-nutrient compound fertilizer nitrogen phosphorus, nitrogen potassium and phosphorus potassium, do not repeat them here; If plant normal growth in desert certainly, the pouring that same needs are suitable, this pouring frequency is relevant with the water retention characteristic of modified sandy soil.

In the present embodiment, after having the water evaporation in cohesiveness and adhesiveness solution between the sandy soil particle of modified sandy soil, substance wherein by sandy soil particle bond together; After the described water evaporation had in cohesiveness and adhesiveness solution, the weight ratio between the solid organic materials that energy is wherein water-soluble and sandy soil is 1:30-8000; The modified sandy soil formed in this proportion can realize the modification of sandy soil better, and its characteristic more can press close to the soil of applicable plant growth.

In the present embodiment, between the sandy soil particle of modified sandy soil, there is interconnected pore and dead-end pore; Modified sandy soil porosity of the present invention can be greater than the porosity of discrete sandy soil, be also greater than the interconnected pore rate of normal soil, and sandy soil has soil characteristics; This hole can store moisture, nutrient and air, makes it have more soil characteristics, can adapt to plant growth.

In the present embodiment, in step a1, the water-soluble solid organic materials of described energy comprises one or both and above mixture in natural polymer and modification solid matter thereof and synthesis macromolecule solid matter; As: one or both and above mixing in polyvinyl alcohol, polyethylene glycol oxide, polyethylene glycol, Sodium Polyacrylate, sodium carboxymethylcellulose, hydroxypropyl methylcellulose and cellulose ether or copolymer; The solid matter of expectation function is played based on low cost; Above-mentioned listed solid matter can be not limited to by water-soluble solid organic materials, there is the solid matter identical or close with listed solid matter character and all can realize object, prerequisite be final formed there is cohesiveness and adhering solution, and this solid matter has thickening property and water-soluble in water, could goal of the invention be realized, not repeat them here.

In the present embodiment, in step a1, also add one or both and the above mixture in the natural polymer that can be scattered in described solution and modified material thereof and synthetic high polymer matter.

In the present embodiment, in step a2, also add one or both and the above mixture in organic pluronic polymer, Small molecular auxiliary agent, surfactant, inorganic active powder or powder material, inorganic inactive powder or powder material, solid substance and pH value Auto-regulator, organic polymer auxiliary agent, Small molecular auxiliary agent and surfactant can select such as glycerine, pentaerythrite, triethanolamine, alkyl carboxylate, alkyl sulfate, alkylphosphonic, alkylsulfonate, alkyl trimethyl ammonium chloride, alkyl uncle ammonium salt, the secondary ammonium salt of alkyl, alkyl tert ammonium salt, alkyl quaternary ammonium salts, beet alkali surface activator, amino acid type surfactant, fatty alcohol-polyoxyethylene ether, alkylphenol polyoxyethylene, polyoxyethylene alkyl amine, polyoxyethylene alkylamide, EPE polyol EPE etc., improve or regulate the cohesiveness of solution in modified sandy soil, adhesiveness, toughness, levelability, dispersiveness, water-soluble, water imbibition, foaminess, defoaming or/and construction workability etc., such as inorganic active powder or powder material and inorganic inactive powder or powder material is optional selects such as diatomite, bentonite, white carbon, flyash, talcum powder, calcium powder and inorganic powder etc., improve or regulate the water suction of the grating of modified sandy soil or modified sandy soil, water conservation, toughness reinforcing performance, solid substance can be some the entity foreign material carried in sandy soil, or the later stage adds, such as rigidity or flexible fiber, fabric, rattan, film tape, sheet etc., improves or regulate the stability of modified sandy soil, crack resistance or toughness, pH value Auto-regulator, such as adds acid, alkaline Auto-regulator, as lime, and Cosan, ferrous sulfate powder, vinegar liquid, pine soil, the material of potassium dihydrogen phosphate and other improvement or adjustment modified sandy soil Acidity of Aikalinity.

The organic polymer auxiliary agent added, Small molecular auxiliary agent, surfactant, inorganic active powder or powder material, inorganic inactive powder or powder material, solid substance and pH value Auto-regulator are not limited to above-mentioned listed material, there is the material identical or close with listed physical property and all can realize object, prerequisite has facilitation for the soil characteristic of modified sandy soil, do not repeat them here.

Certainly, also can add water-absorbing resins, modified starch, modified cellulose, polyacrylate and copolymer analog, polyacrylamide and copolymer analog thereof, polyvinyl alcohol, polyethenoxy ether class, soybean protein class, silk-fibroin class, pectin, alginic acid, shitosan and modifier thereof, blended, the super absorbent resin of super absorbent resin and the compound etc. of inorganic matter gel, improve water suction and the storage capacity of modified sandy soil; Or add fertilizer, inorganic fertilizer and composite organic-inorganic fertilizer, as the binary compound fertilizer and N P and K Nitrogen, Phosphorus and Potassium etc. of compoiste fertilizer, nitrogenous fertilizer, phosphate fertilizer and potash fertilizer or two-nutrient compound fertilizer nitrogen phosphorus, nitrogen potassium and phosphorus potassium, increase character, the level etc. of increasing soil fertility of modified sandy soil, all can improve the combination property of modified sandy soil, be suitable for plant growth.

Experiment shows, repeatedly can be dissolved in the water and there is thickening property and water-soluble in water, then can form the material with cohesiveness and adhesiveness solution has multiple, do not repeat them here, such as: one or both and above mixing in polyvinyl alcohol, polyethylene glycol oxide, polyethylene glycol, Sodium Polyacrylate, sodium carboxymethylcellulose, hydroxypropyl methylcellulose and cellulose ether or copolymer; After being dissolved in the water, can not only (such as mass percent is 5 ~ 10%, more than even 10 ~ 20% or 20%) makes there is cohesiveness and adhering solution in larger volume (solid content after moisture evaporation) situation, and can when less volume, such as less than 5%, even less than 1%, make and there is cohesiveness and adhering solution.Also some auxiliary agent be can add during use, cohesiveness and the adhesiveness of solution improved or improve further; Inorganic substances and organic substance also can be composite, to obtain having cohesiveness and adhering solution desired by us.

Sandy soil are had cohesiveness and adhering solution (containing nutrient) to mix and after mix with described, just can be formed have soil property, the modified sandy soil of particle+constraint+hole (also can be sandy soil, water and can be water-soluble solid organic materials by different order mixing also mix and formed); When wet, moisture and nutrient store in the solution and solution sticks in the hole between sandy soil particle, so modified sandy soil not only has the character that water conservation storage is supported, and have the viscoelastroplasticity character as wet soil; When dry, the particle bondd between modified sandy soil after the solid organic materials consolidation that the energy be originally dissolved in the water is water-soluble, so, modified sandy soil has the character of the porous solid as dry soil, and, material after described consolidation can absorb moisture and again be dissolved in the water, so modified sandy soil also has the ability of absorption moisture (containing nutrient).

In the modified sandy soil structure of particle+constraint+hole, due to make sandy soil particle produce adhesion (cohesive strength) constraint this as added enter material (be solution when moisture is large, moisture hour changes solid into gradually), after material filling pore, the hole of modified sandy soil can be less than the hole of unmodified front discrete sandy soil, but, due to after the solution mix that sandy soil and material are formed, no longer directly contact completely between sandy soil particle, described material is had between contact point, make the spacing between sandy soil increase (and in the solution that material is formed moisture evaporation after, the solid content of material itself is less, its ratio occupying hole is little), therefore, along with the change of " pine " " tightly " of the Contact of particle, the hole of modified sandy soil also can be greater than the hole of the discrete sandy soil be even far longer than before modified, to sum up, the hole of modified sandy soil both can be less than, also the hole of discrete sandy soil before modified can be greater than, experiment shows, the porosity of modified sandy soil can change between 10 ~ 80%, this porosity ranges is not only greater than discrete sandy soil, and be greater than the soil of nearly all type, this just shows, we can regulate the porosity of modified sandy soil by different proportionings and structure, sandy soil are made to contain the moisture of our expectation, nutrient and air.Moreover, in the pellet pores structure of modified sandy soil, both had interconnected pore, and also had dead-end pore, wherein interconnected pore rate is 5-70%, and modified sandy soil can by interconnected pore and the outside exchange that water and air occurs.

In structure due to particle+constraint+hole in modified sandy soil, the restraining force of constraint material (material) and the porosity of modified sandy soil can regulate, so, after moisture evaporation in modified sandy soil, the intensity of the porous solid as dry earth formed can regulate in a very large scope, intensity is when below 10Kpa, modified sandy soil is the solid relatively loosened, when intensity is between 10 ~ 50Kpa, modified sandy soil is shaping solid loose preferably, after intensity is more than 50Kpa, modified sandy soil toughens gradually, modified sandy soil harder during in order to obtain dry, can by regulating constraint and porosity, its intensity is made to reach more than 200Kpa.

The modified sandy soil become by sandy soil, mechanical state is exactly a kind of " soil ", there is stream and become (time wet) and solid (time dry) two states, and, " soil " of dry solid state can be converted into " soil " of wet rheology after absorbing moisture, and " soil " of wet rheology can be converted into " soil " of dry solid state after moisture evaporation, by the constraint between adjustment particle and space, we can regulate the stream of modified sandy soil this " soil " to become (such as viscoelastroplasticity) or solid property, obtain from " sandy soil " to " loam " to " clay " various, " soil " of suitable variety classes plant growth, therefore, by modified sandy soil of the present invention, sand is become " soil ", for the mode of sandy soil, desert can be utilized.

According to the difference of modification object, construction requirement or economy, low viscous solution (below viscosity 100mpas) can be prepared, also moderately viscous solution (viscosity is between 100mpas ~ 5000mpas) can be prepared, also configurable full-bodied solution (viscosity is greater than 5000mpas) and sandy soil mix and form modified sandy soil.

After preparation forms modified sandy soil, due to modified sandy soil and the extraneous exchange that moisture can occur, so, in modified sandy soil, the water content of solution can change, and then, the viscosity of the solution in modified sandy soil except relevant to the material behavior of added material and except, also relevant to the change of water content, but described in have in cohesiveness and adhesiveness solution moisture evaporation after, the solid content of material is geostationary, so we using the weight ratio of added material and sandy soil as controlled quentity controlled variable, can determine the volume of described material.According to the difference of material character, add the kind with the material in cohesiveness and adhering solution in modified sandy soil and volume to select in a larger scope, after moisture evaporation, when the material added and the weight ratio of modified sandy soil are within the scope of 1:30-8000, we all can obtain the modified sandy soil expecting based on different modification object requirement to obtain.

The modified sandy soil obtained based on particle confinement principle, its constraint can not only produce adhesion between sandy soil particle, and adhesion can be produced between sandy soil and material, so in sandy soil doped with appropriate gravel, plant roots, stem, skin, animal wastes, corpse residue etc. time, the character its main body with soil characteristics can not be changed, so, based on the method for particle confinement, we not only can transform simple sand or sandy soil, and can transform the wasteland containing sand and material in Gobi desert etc.; Utilize this character, we even can add rigidity or flexible fiber, fabric, rattan, film tape, sheet etc., improve or regulate the stability of modified sandy soil, crack resistance or toughness; Except can add can be dissolved in the water various fertilizer, except nutrient, fertilizer also can be constrained in modified sandy soil, for plant growth provides nutrition; We can also add water-absorbing resins, acid-base accommodation material etc., improve the soda acid performance of the water suction of modified sandy soil, water retention property or modified sandy soil.

Specific embodiments of the invention:

Embodiment one: comprise the following steps:

A. modified sandy soil is prepared:

A1. polyvinyl alcohol can be selected by water-soluble solid organic materials;

Polyvinyl alcohol and water to be stirred formation solution according to the weight ratio of 5:100;

A2. solution 200kg, 1000kg sandy soil polyvinyl alcohol dissolution formed in water and appropriate corn seed mix and stir, and form modified sandy soil; The weight ratio of the polyvinyl alcohol in modified sandy soil and husky body is 1:105.0;

The modification sand of b just containing corn seed paves and has the simulation sandy land surface of certain area, paving thickness is about 10cm, modified sandy soil moisture is preserved good, evaporation discharge is less, the husky external sight of modification and soil similar, the addition of corn seed is usual planting conditions aequum, after 2 weeks, corn seed germination under field conditions (factors), and growing gradually, this plant that growth final result and soil are planted indifference; Certainly, need to add necessary nutriment in the husky body of modification, in the present embodiment, add 10kg farmyard manure;

Get partially modified sandy soil, take the measures such as oven dry, after making its surperficial dehydration, modified sandy soil surface can be bonded to block, if water to be sprinkled upon the surface of the modified sandy soil after dehydration, the material in modified sandy soil is by moisture absorption, and sandy soil are again in plastic wetting state again.

In the present embodiment, also add following material separately to do experiment: also add the inorganic matter that can be scattered in water and organic matter (than if disperse and swell in the material in water, comprise starch, polyacrylamide etc.) etc. and organic polymer auxiliary agent, Small molecular auxiliary agent and surfactant, the present embodiment have selected pentaerythrite, triethanolamine and alkyl carboxylate, improves or regulates the cohesiveness of solution in modified sandy soil, adhesiveness, toughness, levelability, dispersiveness, water-soluble, water imbibition, foaminess, defoaming or/and construction workability; Inorganic active powder or powder material and inorganic inactive powder or powder material, the present embodiment have selected diatomite, improves or regulate the water suction of the grating of modified sandy soil or modified sandy soil, water conservation, toughness reinforcing performance; Acquired results with do not add compared with these materials, there is better soil characteristics.

Embodiment two: comprise the following steps:

A. modified sandy soil is prepared:

A1. hydroxypropyl methylcellulose can be selected by water-soluble solid organic materials;

Hydroxypropyl methylcellulose and water are stirred according to the weight ratio of 0.2:100 and forms solution;

A2. Gonak 190kg, 1000kg sandy soil and appropriate grass-seed mixed and stir, forming modified sandy soil; The weight ratio of the hydroxypropyl methylcellulose in modified sandy soil and husky body is 1:2637;

Modified sandy soil containing grass-seed paves and has the simulation sandy land surface of certain area by b, the amount that the addition of grass-seed is sowed needed for green grass for usual conditions; Paving thickness is about 10cm, and modified sandy soil moisture is preserved good, and evaporation discharge is less, under the weather conditions in spring of Chongqing region, after 2 weeks, in modified sandy soil moisture condition under grass-seed can be made to germinate, and grow gradually, growth final result and this plant of planting of soil indifference; Certainly, need in modified sandy soil to add necessary nutriment, the present embodiment adds the commercial agricultural composite fertilizer of 5kg.

In the present embodiment, also add following material separately to do experiment: also add the inorganic matter that can be scattered in water and organic matter (than if disperse and swell in the material in water, comprise starch, polyacrylamide etc.) etc. and organic polymer auxiliary agent, Small molecular auxiliary agent and surfactant, the present embodiment have selected alkyl tert ammonium salt, alkyl quaternary ammonium salts, beet alkali surface activator, improves or regulates the cohesiveness of solution in modified sandy soil, adhesiveness, toughness, levelability, dispersiveness, water-soluble, water imbibition, foaminess, defoaming or/and construction workability; Inorganic active powder or powder material and inorganic inactive powder or powder material, the present embodiment have selected flyash and talcum powder, improves or regulate the water suction of the grating of modified sandy soil or modified sandy soil, water conservation, toughness reinforcing performance; Acquired results with do not add compared with these materials, there is better soil characteristics; Also added some flexible fibers, fabric, rattan, film tape, sheet etc., improve or regulate the stability of modified sandy soil, crack resistance or toughness; Acquired results with do not add compared with these materials, there is better soil characteristics.

Embodiment three: comprise the following steps:

A. modified sandy soil is prepared:

A1. sodium carboxymethylcellulose can be selected by water-soluble solid organic materials;

Sodium carboxymethylcellulose and water to be stirred formation solution according to the weight ratio of 1:100;

A2. carboxymethylcellulose sodium solution 210kg, 1000kg sandy soil and appropriate Chinese cabbage seed mixed and stir, forming modified sandy soil; The weight ratio of the hydroxypropyl methylcellulose in modified sandy soil and husky body is 1:481;

B. paved by the modified sandy soil containing Chinese cabbage seed and have the simulation sandy land surface of certain area, the addition of vegetable seed is amount required under usual planting conditions; Paving thickness is about 15cm, modified sandy soil moisture is preserved good, evaporation discharge is less, modified sandy soil outward appearance and soil similar, under the weather conditions in spring of Chongqing, after 2 weeks, in modified sandy soil moisture condition under vegetable seed can be made to germinate, and grow gradually, growth final result and this plant of planting of soil indifference; Certainly, need in modified sandy soil to add necessary nutriment, the present embodiment selects 1 kilogram of agricultural composite fertilizer and 2 kilograms of NPK mixed fertilizers mix and stir.

In the present embodiment, also add following material separately to do experiment: also add the inorganic matter that can be scattered in water and organic matter (than if disperse and swell in the material in water, comprise starch, polyacrylamide etc.) etc. and organic polymer auxiliary agent, Small molecular auxiliary agent and surfactant, the present embodiment have selected alkyl quaternary ammonium salts, beet alkali surface activator, amino acid type surfactant, improve or regulate the cohesiveness of solution in modified sandy soil, adhesiveness, toughness, levelability, dispersed, water-soluble, water imbibition, foaminess, defoaming is or/and construction workability, inorganic active powder or powder material and inorganic inactive powder or powder material, the present embodiment have selected bentonite and white carbon, improves or regulate the water suction of the grating of modified sandy soil or modified sandy soil, water conservation, toughness reinforcing performance, acquired results with do not add compared with these materials, there is better soil characteristics, also added some flexible fibers, fabric, rattan, film tape, sheet etc., improve or regulate the stability of modified sandy soil, crack resistance or toughness, acquired results with do not add compared with these materials, there is better soil characteristics.

Embodiment four: comprise the following steps:

A. modified sandy soil is prepared:

Sodium carboxymethylcellulose and water are dissolved according to the weight ratio of 2.5:100 and forms solution;

A2. carboxymethylcellulose sodium solution 173kg, 1000kg sandy soil and appropriate peanut seed mixed and stir, forming modified sandy soil; The weight ratio of the hydroxypropyl methylcellulose in modified sandy soil and husky body is 1:237;

B. the modified sandy soil containing peanut seed is paved and there is the simulation sandy land surface of certain area, the addition of peanut seed is amount required under usual planting conditions, paving thickness is about 20cm, modified sandy soil moisture is preserved good, modified sandy soil outward appearance and soil similar, under the weather conditions in spring of Chongqing, after 2 weeks, in modified sandy soil moisture condition under peanut seed can be made to germinate, and to grow gradually, this plant that growth final result and soil are planted indifference; Certainly, need in modified sandy soil to add necessary nutriment, the present embodiment selects 5 kilograms of farmyard manures and 1 kilogram of agricultural composite fertilizer.

In the present embodiment, also add following material separately to do experiment: also add the inorganic matter that can be scattered in water and organic matter (than if disperse and swell in the material in water, comprise starch, polyacrylamide etc.) etc. and organic polymer auxiliary agent, Small molecular auxiliary agent and surfactant, the present embodiment have selected alkyl uncle ammonium salt, alkyl secondary ammonium salt, alkyl tert ammonium salt, improves or regulates the cohesiveness of solution in modified sandy soil, adhesiveness, toughness, levelability, dispersiveness, water-soluble, water imbibition, foaminess, defoaming or/and construction workability; Inorganic active powder or powder material and inorganic inactive powder or powder material, the present embodiment have selected diatomite and bentonite, improves or regulate the water suction of the grating of modified sandy soil or modified sandy soil, water conservation, toughness reinforcing performance; Acquired results with do not add compared with these materials, there is better soil characteristics; Also added some flexible fibers, fabric, rattan, film tape, sheet etc., improve or regulate the stability of modified sandy soil, crack resistance or toughness; Acquired results with do not add compared with these materials, there is better soil characteristics.

Embodiment five: comprise the following steps:

A. modified sandy soil is prepared:

A1. methylcellulose and sodium carboxymethylcellulose can be selected by water-soluble solid organic materials;

Methylcellulose and sodium carboxymethylcellulose composite solution is formed after methylcellulose, sodium carboxymethylcellulose and water being dissolved according to the weight ratio of 0.4:0.7:100;

A2. solution 246kg, 1000kg sandy soil methylcellulose and sodium carboxymethylcellulose are compounded to form and appropriate grass-seed mix and stir, and form modified sandy soil; The weight ratio of the hydroxypropyl methylcellulose in modified sandy soil and husky body is 1:373.6;

B. by paving containing grass-seed modified sandy soil, there is the simulation sandy land surface of certain area, the amount that the addition of grass-seed is sowed needed for green grass for usual conditions, paving thickness is about 25cm, modified sandy soil moisture is preserved good, modified sandy soil outward appearance and soil similar, under the weather conditions in spring of Chongqing, after 2 weeks, in modified sandy soil moisture condition under grass-seed can be made to germinate, and to grow gradually, this plant that growth final result and soil are planted indifference; Certainly, need in modified sandy soil to add necessary nutriment, the present embodiment selects N P and K Nitrogen, Phosphorus and Potassium 5kg.

In the present embodiment, also add following material separately to do experiment: also add the inorganic matter that can be scattered in water and organic matter (than if disperse and swell in the material in water, comprise starch, polyacrylamide etc.) etc. and organic polymer auxiliary agent, Small molecular auxiliary agent and surfactant, the present embodiment have selected alkylsulfonate, alkyl trimethyl ammonium chloride, alkyl uncle ammonium salt, improves or regulates the cohesiveness of solution in modified sandy soil, adhesiveness, toughness, levelability, dispersiveness, water-soluble, water imbibition, foaminess, defoaming or/and construction workability; Inorganic active powder or powder material and inorganic inactive powder or powder material, the present embodiment have selected diatomite and bentonite, improves or regulate the water suction of the grating of modified sandy soil or modified sandy soil, water conservation, toughness reinforcing performance; Acquired results with do not add compared with these materials, there is better soil characteristics; Also added some flexible fibers, fabric, rattan, film tape, sheet etc., improve or regulate the stability of modified sandy soil, crack resistance or toughness; Acquired results with do not add compared with these materials, there is better soil characteristics.

Embodiment six: comprise the following steps:

A. modified sandy soil is prepared:

A1. can select hydroxypropyl methylcellulose and dispersible material cationic starch by water-soluble solid organic materials;

By hydroxypropyl methylcellulose, dispersible material cationic starch and water stirs according to the weight ratio of 0.2:2:100, and it is for subsequent use to form composite solution after carrying out Heat Gelatinization;

A2. by hydroxypropyl methylcellulose with dispersible solution 231kg, 1000kg sandy soil that material cationic starch is compounded to form and appropriate wheat seed mix and stirs, formation modified sandy soil; The weight ratio of the hydroxypropyl methylcellulose in modified sandy soil and husky body is 1:201.1;

B. paved by the modified sandy soil containing wheat seed and have the simulation sandy land surface of certain area, paving thickness is about 30cm, and modified sandy soil moisture is preserved good, modified sandy soil outward appearance and soil similar, under the weather conditions in spring of Chongqing, after 2 weeks, wheat seed germinating also grows gradually, and growth better; Certainly, need in modified sandy soil to add necessary nutriment, the present embodiment selects 5kg N P and K Nitrogen, Phosphorus and Potassium 15kg farmyard manure mix and stir.

In above-described embodiment, along with the evaporation of moisture, modified sandy soil porosity and interconnected pore rate are in excursion, and interconnected pore rate scope is 5 ~ 70%, and generally, interconnected pore rate is 15 ~ 50%, and compared with the husky body of the modification of equal proportioning, porosity is slightly little.

In above-described embodiment, also plantation has the multiple dish seedling such as tomato, cucumber, also can plant flowers, trees etc., can plant the rice shoot such as corn, capsicum equally, and growing way is all better, the same with soil planting effect, and the tomato, cucumber etc. of plantation also can result also eat.

In above-described embodiment, the weight ratio of energy solid organic materials soluble in water and sandy soil in modified sandy soil is listed with wider scope, after a large number of experiments show that again, energy solid organic materials soluble in water is different from the weight ratio of sandy soil, form modified sandy soil and also there is different, when can solid organic materials soluble in water (material is determined) and the weight ratio of sandy soil more hour, Water-saving effect suitably reduces, when energy solid organic materials soluble in water (material is determined) and the weight ratio of sandy soil are larger, Water-saving effect is better, but, what adapt therewith is, adhesion strength between sandy soil particle also increases along with the rising of the weight ratio of solid organic materials (material is determined) and sandy soil, reduce along with the reduction of the weight ratio of solid organic materials (material is determined) and sandy soil, when energy solid organic materials soluble in water and sandy soil weight ratio reach 1:8000, modified sandy soil still has certain water retention, still has adhesion strength, but decrease between sandy soil particle, and can growing plant, but must suitably water to ensure growth conditions, and when energy solid organic materials soluble in water and sandy soil weight increase to 1:30, between the sandy soil particle of modified sandy soil, adhesion strength is larger, Water-saving effect is better, but modified sandy soil itself has the phenomenon that hardens, for sand-fixing effect clearly, certainly, also can be used for plant growth, the modified sandy soil just with the phenomenon that hardens is unfavorable for the growth of root system of plant, that is, according in the present invention to can the requirement of solid organic materials physical property soluble in water, the consumption of energy solid organic materials soluble in water fixes the sand relatively at most, water conservation, sandy soil particle bond intensity are better, otherwise can reduce, and above-mentioned scope is not merely 1:8000 to 1:30, also can suitably reduce or increase, formed modified sandy soil all have expects or foreseeable effect, but be suitable for sandy soil ground or desert in and formed be similar to soil for plant growth then need employing OK range, certainly, same proportioning the present invention should have higher cohesiveness and moisture capacity compared with the husky body of modification.

Above-described embodiment can not all alternative material of limit, than if the water-soluble solid organic materials of energy in dissolved water also has a lot, does not repeat them here, all can realize goal of the invention, certainly, plays the material of expectation function based on low cost.

Certainly, the order by merging of said components can not limit protection scope of the present invention, by sandy soil, water and can mix in any order and mix and being formed by water-soluble solid organic materials, after mix, the water-soluble solid organic materials of described energy is dissolved in the water and is formed and has cohesiveness and adhering solution and adhesion sandy soil grain and form the modified sandy soil with pellet pores structure; The described moisture had in cohesiveness and adhering solution can with solution adheres between sandy soil grain; After the described moisture evaporation had in cohesiveness and adhering solution, material wherein again can be dissolved in the water after meeting water and be formed and have cohesiveness and adhering solution and adhesion sandy soil grain; Further, prove by experiment, the result of gained there is no obvious change.

On this modified sandy soil during planting plants, whole modes of planting plants in prior art soil can be adopted, comprise membrane curing, booth growth, to resist outside severe natural environment; In a word, do not have internal to distinguish with planting plants in soil, do not repeat them here.

Contrast shows, have after cohesiveness and adhering liquid and sandy soil mix forms modified sandy soil by described, pave structure sheaf again that formed in common husky body (sandy soil) surface, with described liquid is sprayed directly on common husky body (sandy soil) surface and the superficial layer that formed has essential difference, be embodied in:

The first, realize fundamental difference in principle.

From the composition rule of particulate matter, modified sandy soil is based upon the present inventor to propose on the basis of " particle confinement " principle, is a kind of thinking of brand-new sandy soil " soil ".

Constraint type between common sandy soil particle is " contact ", only there is contact and frictional force in its contact point, and without any node adhesion with in conjunction with moment (as node draws force and moment), therefore, sandy soil particle can only by contact and frictional force balancing gravity and external force, its node can not bear and draw force and moment, otherwise, sandy soil just will occur particle arrangement sudden change and unstability.

And will have after cohesiveness and adhering liquid and sandy soil mix forms modified sandy soil, restraining force between its particle node is " adhesion ", it can either produce the restraining tensile force be separated between opposing particle, the restraint moment that opposing particle rotates can be produced again, simultaneously, it can also produce node pressure and frictional force, therefore, it can limit all degree of freedom of particle, but this restriction is again limited, particle node is while generation constraint reaction, can also extend, rotate and slide, therefore, its constraint type and common sandy soil fundamental difference, that is, modified sandy soil both can resist external force, again can be limited under external force and stably move.On the other hand, in modified sandy soil, being constrained to " adhering to constraint " of sandy soil whole interior, this constraint is formed after having cohesiveness and adhering liquid and sand mix, on microscopical structure, this constraint is after each sandy soil particle surface uniform fold one deck adhesion layer, contact again between particle and formed, therefore, this constraint has universal property and restorability, that is, all can be formed " adhering to constraint " at any point cantact between particle, and after being separated, contact between particle, this binding feature can be recovered again.Therefore, modified sandy soil has the viscoelastroplasticity character of even macroscopic and isotropic, the same with the mechanical characteristic of wet soil.

Once after moisture evaporation in modified sandy soil, " adhere to constraint " just will become " consolidation constraint ", namely, space arrangement between sandy soil particle will be fixed, and sandy soil can bearing load, has some strength, show as the character of porous solid, just as dry soil.Meanwhile, as previously mentioned, after meeting water, " consolidation constraint " becomes again " adhering to constraint ", and sandy soil become viscoelastroplasticity body from solid.In modified sandy soil (when no matter doing or time wet), there is connection, open space all the time, with the external world, the exchange of moisture, nutrient and air occurs.

But, if only there is cohesiveness and adhering spray liquid on husky body (sandy soil) surface by described, only can form one deck adhesive film on husky body (sandy soil) surface, the liquid of infiltration under adhesive film is very limited, and this layer of adhesive film dry after, just become solid film, obviously, this method itself is not draw based on " particle confinement " principle, with the thinking fundamental difference of sandy soil " soil " yet.Be sprayed on adhesion layer (being thin layer after solidification) and the liquid of infiltration under adhesion layer in very thin scope thereof on husky body (sandy soil) surface, only define constraint in husky surface, this constraint, by by force to weak, does not have all even isotropic nature, comes in and goes out very large with the character of soil; Adhesion layer (thin layer after solidification) resides in sand (sandy soil) particle surface, can be completely closed by the hole between husky (sandy soil) particle, this with have be communicated with, the modified sandy soil fundamental difference of open space, also with the thinking fundamental difference of soil; In modified sandy soil constrain in modified sandy soil inner homogeneous, equivalence has an effect, with the property class of natural soils seemingly, and spray layer and only have an effect near surface, not there is the characteristic of natural soils.

The second, fundamental difference in architectural characteristic.

On structure dimension, the modified sandy soil formed after mix, its physical dimension can regulate as required, and paving thickness is changeable, when structural thickness is large, can plant the plant that plant is tall and big, and structural thickness hour, the plant that plant is short and small can be planted; And the thickness spraying layer is only formed near surface, its physical dimension is difficult to regulate as required.

On intensity and wear properties, the modified sandy soil formed after mix, what formed is plate body, has the mechanical characteristic of plate, when the strength of materials is relatively little, still possesses higher bearing capacity, reach the object of fixing the sand, and, the cracking of plate body or destruction, do not destroy the effect that it fixes the sand, play principle with the intensity of soil layer and stability consistent; Meanwhile, modified sandy soil in its thickness range, viscoelastroplasticity body when no matter being wet, or porous solid time dry, all can either stablize the root system of plant, growth and the development of root system can be adapted to again, with soil curing plant with to adapt to the mechanical characteristic that root system of plant develops consistent.But, spray the skin layer formed, there is the mechanical characteristic (very large with the characteristic difference of plate) of film, must ensure enough intensity, just can reach the object of fixing the sand, top layer is once destroy, just be difficult to the husky body under constraint top layer, its effect of fixing the sand just is difficult to play; Meanwhile, between the husky body particle under surperficial top layer, there is no additional constraint, be still the husky body of nature, can not root system of plant be stablized, with the characteristic fundamental difference of soil.

On pore characteristic, the even pore distribution of modified sandy soil, has and is communicated with and the open space contacted with the external world, with the external world, the exchange of moisture, nutrient and air can occur, and spray the skin layer formed, enclose husky body (sandy soil) and contact with extraneous.

At water conservation, in water storage and evaporation characteristic, first, the water conservation of modified sandy soil, water storage principle is directly stored in by water to have in cohesiveness and adhering liquid (as previously mentioned, removing solid matter in liquid is all water), be difficult to evaporation and run off, with the water conservation of soil, Water storage characteristics is very similar, its water conservation, storage capacity is very strong, and this ability can regulate in a larger scope, the growth of various plant can be adapted to, show in the enforcement in Chongqing, the modified sandy soil of the high storage capacity obtained by regulating match ratio, can rice cultivation flourishing, until gather in the crops full paddy, secondly, the evaporation characteristic of modified sandy soil is also similar with soil, and after the moisture evaporation in the surperficial grains of sand, inner moisture not directly and extraneous contact, from top to bottom slow evaporation, keeps reasonably evaporation and a water storage gradient.But, spray the skin layer formed, its water conservation, the characteristic of water storage and evaporation and modified sandy soil fundamental difference, firm sprinkling and the water resided in skin layer, only can penetrate into the very little scope in below top layer, be easy to evaporate and form the solid film closed with the external world, now, film itself is without storage capacity, its water storage principle is: utilize the free moisture in husky body (sandy soil), evaporate because temperature is uneven in temperature, cohesion, the complex process be hampered, it is finally made to rest on the region of film close beneath, the water storage principle fundamental difference of this water storage principle and soil and modified sandy soil, the moisture stored is few, only can adapt to the growth of minority plant.

3rd, the plantation of plant is different with growth characteristics.

First, in the plantation characteristic of seed, implement contrast and show, for modified sandy soil, seed can be embedded in modified sandy soil, or is sown in modified sandy soil surface, different according to the germination characteristic of seed, and various seed all can germinating growth; And for the method for surface sprinkling adhesion layer, after various seed is buried or broadcasted sowing, must spray thin layer adheres to cover layer, but, because the moisture below surface coating is few, the seed that part is imbedded do not germinate or germination poor; Meanwhile, due to surface coating solidify after can close seed (and moisture evaporates), the seed broadcasted sowing is after covering thin layer, and same appearance is not germinateed or the situation of germination difference.Therefore, modified sandy soil has the character of soil, seed sprouting preferably.

In the plantation characteristic of plant, enforcement contrast shows, modified sandy soil can plant each Plants, according to the difference of modified sandy soil thickness, the herbaceous plant that plant is short and small can be planted, also can plant the tall and big herbaceous plant of plant, also shrub can be planted, further, when the local thickness of modified sandy soil and volume can stablize root system of plant, also high megaphanerophyte can be planted; But, form thin layer at spraying liquid and adhere to after cover layer, the moisture evaporation especially in thin layer cover layer and after forming solid thin-film layer, serike destroys thin layer for cost, therefore, after spraying thin layer cover layer, be suitable for hardly planting any plant again; And spray adhesion layer after serike again, few of real value.

In the growth characteristics of plant, the general well-grown of the plant in modified sandy soil, with general soil and indifference, according to the difference of modified sandy soil thickness, modified sandy soil can the short and small herbaceous plant of growth plant, also can the tall and big herbaceous plant of growth plant, also can grow shrub and arbor, but, only when thin layer sprays covering, the general growing state of plant is poor, and, sand below thin layer cover layer, is difficult to the tall and big herbaceous plant of firm plant (as corn etc.) and trees.

It should be noted that, above embodiment is only in order to illustrate technical scheme of the present invention and unrestricted, although with reference to preferred embodiment to invention has been detailed description, those of ordinary skill in the art is to be understood that, can modify to technical scheme of the present invention or equivalent replacement, and not departing from aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of right of the present invention.

Claims

1. utilize plant type modified sandy soil to administer a method for sand ground, it is characterized in that: comprise the following steps:

A. modified sandy soil is prepared:

A1. get the water-soluble solid organic materials of energy and be dissolved in the water, formation has cohesiveness and adhering solution, and the water-soluble solid organic materials of described energy comprises one or both and above mixture in natural polymer and modified material thereof and synthetic high polymer matter;

Described have after cohesiveness and adhering solution and sandy soil mix can adhesion sandy soil particle, and the modified sandy soil of formation is pellet pores structure; The described moisture had in cohesiveness and adhering solution can with solution adheres between sandy soil particle; After the described moisture evaporation had in cohesiveness and adhering solution, the water-soluble solid organic materials of energy wherein again can be dissolved in the water after meeting water and be formed and have cohesiveness and adhering solution and adhesion sandy soil particle; After the described water evaporation had in cohesiveness and adhesiveness solution, the weight ratio between the solid organic materials that energy is wherein water-soluble and sandy soil is 1:30-8000;

2. utilize plant type modified sandy soil to administer a method for sand ground, it is characterized in that: comprise the following steps:

A. modified sandy soil is prepared:

A1. get plant seed, sandy soil, water and can water-soluble solid organic materials, the water-soluble solid organic materials of described energy comprises one or both and above mixture in natural polymer and modified material thereof and synthetic high polymer matter;

The water-soluble solid organic materials of described energy is dissolved in the water and is formed and has cohesiveness and adhering solution and adhesion sandy soil particle, and the modified sandy soil of formation is pellet pores structure; The described moisture had in cohesiveness and adhering solution can with solution adheres between sandy soil particle; After the described moisture evaporation had in cohesiveness and adhering solution, the water-soluble solid organic materials of energy wherein again can be dissolved in the water after meeting water and be formed and have cohesiveness and adhering solution and adhesion sandy soil particle; After the described water evaporation had in cohesiveness and adhesiveness solution, the weight ratio between the solid organic materials that energy is wherein water-soluble and sandy soil is 1:30-8000;

3. the method utilizing plant type modified sandy soil to administer sand ground according to claim 1 and 2, it is characterized in that: in step b, paving thickness is greater than 5cm.

4. the method utilizing plant type modified sandy soil to administer sand ground according to claim 1 and 2, is characterized in that: in step a, is also mixed with the nutriment for plant growth in described modified sandy soil.

5. the method utilizing plant type modified sandy soil to administer sand ground according to claim 1 and 2, it is characterized in that: after having the water evaporation in cohesiveness and adhesiveness solution between the sandy soil particle of modified sandy soil, solid mass-energy wherein by sandy soil particle bond together; Between the sandy soil particle of modified sandy soil, there is interconnected pore and dead-end pore.

6. the method utilizing plant type modified sandy soil to administer sand ground according to claim 1 and 2, it is characterized in that: in step a1, also add one or both and the above mixture in the natural polymer that can be scattered in described solution and modified material thereof and synthetic high polymer matter.

7. the method utilizing plant type modified sandy soil to administer sand ground according to claim 1 and 2, it is characterized in that: in step a2, also add one or both and the above mixture in organic pluronic polymer, Small molecular auxiliary agent, surfactant, inorganic active powder or powder material, inorganic inactive powder or powder material, solid substance and pH value Auto-regulator.

8. the plant type modified sandy soil that utilizes according to claim 5 administers the method for sand ground, it is characterized in that: the water-soluble solid organic materials of described energy is one or both and above mixing in polyvinyl alcohol, polyethylene glycol oxide, polyethylene glycol, Sodium Polyacrylate, sodium carboxymethylcellulose, hydroxypropyl methylcellulose and cellulose ether or copolymer.