CN102612887B - A kind of Wei Hai hydraulic reclamation district vegetation fast construction method - Google Patents
A kind of Wei Hai hydraulic reclamation district vegetation fast construction method Download PDFInfo
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- CN102612887B CN102612887B CN201210114304.1A CN201210114304A CN102612887B CN 102612887 B CN102612887 B CN 102612887B CN 201210114304 A CN201210114304 A CN 201210114304A CN 102612887 B CN102612887 B CN 102612887B
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Abstract
The present invention relates to a kind of Wei Hai hydraulic reclamation district vegetation fast construction method, comprise the steps: 1, hidden pipe salt discharge: hidden pipe spacing is 2m-3m; The hidden pipe buried depth of plantation herbage flower and ground cover plant is 70-80cm, the hidden pipe buried depth of plantation undershrub and large shrub is 90-105cm, plantation shallow root arbor and dark root arbor hidden pipe buried depth are 135-150cm, if variety classes plant society pattern is then as the criterion with demand depth capacity in all plants; 2, mix extra large sand, carbide slag in hydraulic fill sea mud, and add garden waste chip or straw chip or both mixtures, mix evenly; 3, after having mixed, use salt water, brackish water, fresh water to carry out irrigation desalination, 4, then sowing Salt-tolerant Forage Grasses are or/and halophitic vegetation carries out biological modification to soil, and every square meter uses 4-8kg fertilizer simultaneously, finally carries out planting and management.The present invention solves hydraulic fill sea mud and is used as the native source problem of greening.
Description
Technical field
The present invention relates to a kind of greening method of Wei Hai hydraulic reclamation district, particularly a kind of method mainly for Puddy coastal zone Wei Hai land reclamation district vegetation rapid build.
Background technology
Be the good and fast development of feasible region economic society in recent years, coastal area all using marine resources and advantage in geography as the powerful engine promoting this area socio-economic development, launched respectively a series of Major Strategic behave.The national major projects such as nuclear power, iron and steel, heavily change are one after another to coastal gathering, and industry chain (supply chain) constantly extends, and the exploitation dynamics of various places to ocean strengthens suddenly." coastal five one lines " strategic plan has been made in Liaoning, Hebei proposes to build " Cao Feidian and new district, the Bohai Sea, Cangzhou ", Tianjin Expedite the application " Binhai New District developing and opening ", the development model advancing " one body two wings adds marine economy " is made great efforts in Shandong, " the building west-bank economic region " in " the Coastal regions exploitation " in Jiangsu, Fujian, " ring North Sea development of economic region is open " in Guangxi, and Zhejiang, Guangdong and Hainan the strategic plan of construction marine economically strong province construction.But because urban land resource is day by day rare, eye is invested and is reclaimed fields from the sea by coastal cities one after another.Reclaim fields from the sea and can solve the nervous problem in soil to some extent.But then, we must see reclaiming fields from the sea and also directly or indirectly result in the degeneration of the coastal region ecosystem, destroy the natural quality of mud wetland and the natural landscape of littoral zone beach uniqueness; New soil building ground, due to the restriction by ecological factors such as water, soil, salt, weathers, is mainly reflected in that subterranean water level is higher, the degree of mineralization of ground water is greater than 30g/L, is equivalent to seawater salinity.Total salt content (belongs to solonchak category) more than 1%, and general plant is difficult to survive.Soil acidity or alkalinity is all more than 8.5, and soil belongs to strong basicity.The soil texture is sticky heavily, structure is poor, the degree of packing is high, osmotic coefficient is low, be unfavorable for Soil Desalting, soil depletion, liquid manure gas heat is inharmonious, is unfavorable for plant growth, and large area bare area has become the important sources of coastal region dust pollution simultaneously, nature desalination and vegetation are formed and succession needs for a long time, cannot develop and the demand of human living by adapt to economic development.Therefore how build the land vehicles ecosystem on the ground enclosing extra large barged-in fill, creating the ecotope being suitable for human living and socio-economic development demand has become the major issue that these regionl development construction face.
Current is adopt traditional farmland soil moved in improve the original mode to carry out in the method for this type of regional vegetation rapid build, but this kind of method destroys the phenomenon of the ecotope of another place while there is construction one side ecotope, obviously run counter to sustainable development idea, or after hydraulic fill sea mud is by nature drainage and natural precipitation desalination, improved by halophitic vegetation natural deduction mode again, this mode meets ecological rule, but need the cycle oversize, cannot adapt to economic development social development and dwelling environment construction to the requirement of time, we also once mixed alkaline residue in hydraulic fill sea mud, flyash changes the physicochemical property of sea silt soil, improve infiltration rate, and bury hidden pipe underground, the fresh water desalinization of soil by flooding or leaching, then carry out Urban Landscape Construction and succeed (patent No. 96100711.7), but this kind of mode cost is high, particularly large to fresh water demand, simultaneously by alkaline residue, fly ash and region restriction, and due to technological progress, flyash multi-processing is the materials'use that added value is higher, be difficult to the improved materials that flyash is used as hydraulic fill sea mud at present, the substitute of other discarded objects must be found, apply and be also restricted, corresponding technical parameter is also lacked, as blind pipe buried depth and spacing for hydraulic fill sea mud engineering improving technology and the tall different vegetation types such as grass of filling with of plantation.The object of the invention is to overcome the deficiencies in the prior art, providing a kind of Wei Hai hydraulic reclamation district vegetation economical and fast construction method.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of Wei Hai hydraulic reclamation district vegetation fast construction method is provided.The present invention is directed to fundamental property and the greening requirement of hydraulic fill sea mud, in conjunction with discarded object present situation, a kind of fast greening technology mode in Wei Hai hydraulic reclamation district is proposed, technology mode of the present invention is that different discarded object changes hydraulic fill sea mud character-salt water, brackish water desalination-salt-tolerant plant biological modification-fertilizer fosters and apply fertilizer-Urban Greening for use carbide slag, extra large sand and gardens deadwood chip etc., use chemistry, physics, biological method realizes discarded object and salt water, brackish water comprehensive utilization, reduce cost, realize the benign cycle of ecotope.First be for hydraulic fill sea mud physicochemical property and moisture-salt transport rule, propose desalination and control the accumulation of salt in the surface soil and plant hidden pipe buried depth corresponding to herbage flower, ground cover plant, undershrub, large shrub and shallow root arbor and spacing combination; The concrete ratio of a kind of industrial waste carbide slag and gardens organic waste and agricultural crop straw Combination application is proposed, the Combination application of saline and slight saline water in hydraulic fill sea mud desalination, finally plant salt tolerant leguminous plant and carry out soil melioration and measures for building, solve hydraulic fill sea mud and be used as the native source problem of greening.
The technical solution used in the present invention is:
A kind of Wei Hai hydraulic reclamation district vegetation fast construction method, comprises the steps:
1), hidden pipe salt discharge: the desalination of hydraulic fill sea mud engineering improvement and the hidden pipe spacing of the control accumulation of salt in the surface soil are 2m-3m; Plantation herbage flower is or/and the hidden pipe buried depth of ground cover plant is 70-80cm, plantation undershrub is or/and the hidden pipe buried depth of large shrub is 90-105cm, plantation shallow root arbor is or/and dark root arbor hidden pipe buried depth is 135-150cm, if variety classes plant society pattern is then as the criterion with demand depth capacity in all plants;
2) physicochemical property of extra large sand, carbide slag change hydraulic fill sea mud, is mixed in hydraulic fill sea mud, mixing volume ratio is hydraulic fill sea mud: extra large sand: carbide slag=0.5-0.55 part: 0.25-0.40 part: 0.05-0.25 part, and add garden waste chip or straw chip or both mixtures according to the amount of the 5%-10% of its volume after mixing, mix evenly;
3) after, having mixed, first use 3-6g/L irrigation with saline water desalination, when mixing rear hydraulic fill sea mud 0-60cm soil body salinity and dropping to below 6g/kg, 1-3g/L brackish water is adopted to carry out irrigation desalination, when 0-60cm soil body salinity drops to below 3g/kg, use fresh water to carry out irrigation and continue desalination once or twice;
4) Salt-tolerant Forage Grasses, is then sowed or/and halophytes carries out biological modification to soil, when planting plants biomass reach the highest season time turn over Yu Tuzhong as green manure and improve soil, every square meter uses 4-8kg fertilizer simultaneously, finally carries out ornamental plant plantation and management.
Preferably, described step 2) in hydraulic fill sea mud, extra large sand, carbide slag volume parts ratio be: hydraulic fill sea mud: extra large sand: carbide slag=0.55: 0.40: 0.05 or 0.5: 0.25: 0.25.
Preferably, described step 2) described in garden waste be deadwood, fallen leaves or grass bits in one or more mixture.
Preferably, described step 4) Salt-tolerant Forage Grasses is one or more combination in clover, sainfoin, facet syndrom, sweet clover, lomax, witloof, sesbania, Grain Production of Amaranthus.
Preferably, described step 4) fertilizer used is the decomposed manure meeting professional standard NY525-2002.
The beneficial effect that the present invention has is:
Desalination proposed by the invention and control the accumulation of salt in the surface soil and hidden pipe buried depth corresponding to plantation herbage flower, ground cover plant, undershrub, large shrub and shallow root arbor and spacing combination, solve salt discharge difficulty and secondary salinization problem, adopt different hidden pipe buried depths and spacing for different plant simultaneously, solve the middle blindness of engineering design, also save construction costs; The physical property that a kind of trade waste and agricultural wastes Combination application change hydraulic fill sea mud is proposed, improve its infiltration rate, accelerate desalination, shorten the desalination period of prior art greatly, improve the service efficiency of desalination water simultaneously, change the structure of hydraulic fill sea mud and suppress the problems such as desalination alkalization, eliminating salinity and provide condition to the impact of the plant direct modified utilization that is hydraulic fill sea mud and hydraulic reclamation district vegetation rapid build.Combination application saline and slight saline water in hydraulic fill sea mud desalination, reduces fresh water usage amount, finally plants salt tolerant leguminous plant and carries out soil melioration and foster and apply fertilizer, and solution hydraulic fill sea mud structure is poor, fertility low, and reduces other organic manure application rates, reduces improvement cost.The present invention accelerates its desalination processes and the alkalinization that inhibit it strong by research and technical combinations, for the vital movement of plants and soil microorganism creates condition, accelerate the slaking process of hydraulic fill sea mud, avoid the destruction of soil moved in improve the original to land resources and the ecological balance; Eliminate pollution that transport soil moved in improve the original causes to surrounding environment and the damage to road, and by the dissolving of discarded object, resource, the each side such as the negative effect that city ecology construction and " soil moved in improve the original " method that overcomes are brought organically combine, and reduce cost of eco-construction.
Embodiment
Below in conjunction with specific embodiment, the present invention will be further described, but do not limit protection scope of the present invention.
Embodiment 1
Binhai New Area in Tianjin hydraulic fill sea mud foundry loam content is high, and plasticity is strong, salt content is high, osmotic coefficient is little, and first lay blind pipe at 90cm soil layer on request to hydraulic reclamation district afforested areas in early November, hidden pipe spacing is set to 2-3m, after freezing and to melt with spring winter, carbide slag, extra large sand is added to hydraulic fill sea mud, wherein hydraulic fill sea mud: extra large sand: carbide slag (volume ratio)=0.55: 0.40: 0.05, and add gardens deadwood chip according to the amount of mix its volume rear 5%, and mix evenly, after having mixed, first use 3-6g/L irrigation with saline water desalination, when mixing rear hydraulic fill sea mud 0-60cm soil body salinity and dropping to below 6g/kg, 1-3g/L brackish water is adopted to carry out irrigation desalination, when 0-60cm soil body salinity drops to below 3g/kg, fresh water is used to fill with once permeable, clover is sowed and sesbania (Salt-tolerant Forage Grasses) carries out biological modification April, when biomass reach the highest season time turn over Yu Tuzhong as green manure and improve soil, simultaneously every square meter is used 8kg decomposed manure (meeting professional standard NY525-2002) and is done the 50cm degree of depth and mix, finally carry out ornamental plant plantation and management.
Field follow-up investigation result is as follows:
(1) average daily desalination speed is 0.32%-0.35%, and the hydraulic fill sea mud district desalination hardly of unmodified;
(2) greatly shorten the hydraulic fill sea mud desalination time, generally completed in 30 days, (under natural conditions, needing the 5-10 year);
(3) particle diameter composition is main based on fine sand, and hydraulic fill sea mud is mainly based on thick clay;
(4) ion composition is by original Na
+, Ca
2+, Cl
-, CO
3 2-type transfers Ca to
2+, SO
4 2-type, and Cl
-, Na
+solution-off rate all more than 98%, Ca
2+solution-off rate is 85%, CO
3 2-solution-off rate more than 99%, and tester hydraulic fill sea mud is 0;
(5) plant sesbania, the equal well-grown of clover, reduce the bulk density of soil, increase soil moisture content, increase soil porosity, add covered ground, inhibit the soil accumulation of salt in the surface soil, increase the content of the soil organic matter and available nutrient.Microbial count adds 7.8 times, the quantity of 0cm-5cm bacterium, actinomycetes and fungi adds 3.4 times, 9.4 times and 1.5 times respectively, 5cm-20cm bacterium, actinomycetes and fungi add 2.4 times, 40.7 times and 2.7 times respectively, and 20cm-40cm bacterium, actinomycetes and fungi add 8.1 times, 46 times and 3.5 times respectively.
(6) this technical costs is low, and every square meter greenery patches cost reduces by 25 yuan than soil moved in improve the original improvement greening cost, can meet requirement and the Region Sustainable Development of socioeconomic development simultaneously, also can not cause negative effect to environment.
Embodiment 2
This demonstration project area 10,000 square meter, initial salt content is 30.6g/kg, blind pipe buried depth is 135cm, all the other improvement flow processs are with embodiment 1, biological modification is carried out in plantation Suaeda salsa (halophitic vegetation), then plant the ornamental plant such as silk tree, locust tree, Chinese scholar tree, Luan Shu, Tianjin Chinese wax, thousand Chinese toons, torch tree, the rose of Sharon, shrubby flase indigo, moundlily, Chinese small iris, gold leaf common bluebeard, winter jasmine, clovers, plant survival rate reaches more than 98%, grows fine.
The above, it is only preferred embodiment of the present invention, not any pro forma restriction is done to technical scheme of the present invention, every above embodiment is done according to technical spirit of the present invention any simple modification, equivalent variations and modification, all still belong in the scope of technical scheme of the present invention.
Claims (5)
1. a Zhong Weihai hydraulic reclamation district vegetation fast construction method, is characterized in that: comprise the steps:
1), hidden pipe salt discharge: the desalination of hydraulic fill sea mud engineering improvement and the hidden pipe spacing of the control accumulation of salt in the surface soil are 2m-3m; Plantation herbage flower is or/and the hidden pipe buried depth of ground cover plant is 70-80cm, plantation undershrub is or/and the hidden pipe buried depth of large shrub is 90-105cm, plantation shallow root arbor is or/and dark root arbor hidden pipe buried depth is 135-150cm, if variety classes plant society pattern is then as the criterion with demand depth capacity in all plants;
2) physicochemical property of extra large sand, carbide slag change hydraulic fill sea mud, is mixed in hydraulic fill sea mud, mixing volume ratio is hydraulic fill sea mud: extra large sand: carbide slag=0.5-0.55 part: 0.25-0.40 part: 0.05-0.25 part, and add garden waste chip or straw chip or both mixtures according to the amount of the 5%-10% of its volume after mixing, mix evenly;
3) after, having mixed, first use 3-6g/L irrigation with saline water desalination, when mixing rear hydraulic fill sea mud 0-60cm soil body salinity and dropping to below 6g/kg, 1-3g/L brackish water is adopted to carry out irrigation desalination, when 0-60cm soil body salinity drops to below 3g/kg, use fresh water to carry out irrigation and continue desalination once or twice;
4) Salt-tolerant Forage Grasses, is then sowed or/and halophitic vegetation carries out biological modification to soil, when planting plants biomass reach the highest season time turn over Yu Tuzhong as green manure and improve soil, every square meter uses 4-8kg fertilizer simultaneously, finally carries out ornamental plant plantation and management.
2. a kind of Wei Hai hydraulic reclamation district according to claim 1 vegetation fast construction method, is characterized in that: described step 2) in hydraulic fill sea mud, extra large sand, carbide slag volume parts ratio be: hydraulic fill sea mud: extra large sand: carbide slag=0.55:0.40:0.05 or 0.5:0.25:0.25.
3. a kind of Wei Hai hydraulic reclamation district according to claim 1 and 2 vegetation fast construction method, is characterized in that: described step 2) described in garden waste be deadwood, fallen leaves or grass bits in one or more mixture.
4. a kind of Wei Hai hydraulic reclamation district according to claim 1 and 2 vegetation fast construction method, is characterized in that: described step 4) Salt-tolerant Forage Grasses is one or more combination in clover, sainfoin, facet syndrom, sweet clover, lomax, sesbania, witloof, Grain Production of Amaranthus.
5. a kind of Wei Hai hydraulic reclamation district according to claim 1 and 2 vegetation fast construction method, is characterized in that: described step 4) fertilizer used is the decomposed manure meeting professional standard NY525-2002.
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