CN103262689A - Coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill - Google Patents
Coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill Download PDFInfo
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Abstract
The invention discloses a coastal saline-alkali soil terrace type afforesting method for improvement of dredger fill. The coastal saline-alkali soil terrace type afforesting method for improvement of the dredger fill comprises water seepage ditches, foundation terrain dredger fill, straw curtains, geotechnical cloth, improved planting soil, local models and the like, wherein square seepage ditches of the water seepage ditches are longitudinally excavated in the lowest position of the foundation terrain dredger fill, particle-size ballast stones are filled into the square seepage ditches, the distance between the foundation terrain dredger fill and the ground is 1-1.5m, the gradient of the foundation terrain dredger fill is 15 degrees to 30 degrees, straw is distributed on the foundation terrain dredger fill, the geotechnical cloth is laid on the straw curtains, and then the improved planting soil is laid on the geotechnical cloth. Due to the fact that the coastal saline-alkali soil terrace type afforesting method for improvement of the dredger fill is combined with the terrace type shape, the coastal saline-alkali soil terrace type afforesting method for improvement of the dredger fill is beneficial to retaining rainwater, enables salinity to be effectively leached and reduced, is beneficial to fertilizer and soil conservation, and enables the survival rate of landscape plants to be more than 90%, the waste is effectively utilized, natural resources are protected, and afforesting cost is reduced by more than 50%.
Description
Technical field
The invention belongs to the landscape engineering technical field, the method for design afforestation especially relates to the greening method that beach saline land terrace-type barged-in fill is improved.
Background technology
The formation of China's alkaline earth and alkali-affected soil, most of relevant with the accumulative total of carbonate in the soil, thereby basicity is generally higher, serious salt affected soil regional plant almost can not be survived.Beach saline land has characteristics such as area is wide, areal variation big, improvement difficulty as one of China's main type in saline land.The particularly greening of the original saline-alkali soil of coastal region and barged-in fill is to perplex the difficult problem that the port greening is built for a long time always.The modes that adopt the strange land soil removal and replacement of harbor district greening in the past need be bought a large amount of cubic metres of earth from elsewhere, have the native source of greening anxiety easily, cause the elsewhere ecological disruption, disadvantage such as be difficult to continue.Coastal saline-alkali soil is owing to be subjected to the dipping of seawater for a long time, neutral salinities such as the sodium chloride in the soil, sodium sulphate constantly deposit, and cause physical characteristics such as marine solonchak has structure viscous, air capacity of soils is poor, the aerobic microorganism activity is poor, nutrient discharges slowly, osmotic coefficient is low, capillarity is strong.In addition, because the coastal region shortage of water resources, thereby causing topsoil salination aggravation, garden plants is difficult to survive at this, is having a strong impact on beach saline land greening survival rate.
Coastal saline-alkali area original soil greening method has the reclamation of salinep-alkali soil measure of many maturations at present, mainly contain (1) physically improved, as ground grading, deep ploughing is suned the earth which has been ploughed up, soil moved in to improve the original is raised ground, microcell is improved the soil, whole ground, big cave etc., this has certain improved effect for low water level, soil below the salinity moderate, but for the high water level area, under the effect of soil capillary, still accumulation of salt in the surface soil phenomenon can appear, cause the upper soll layer salinity to gather, occur hardening, plant is difficult to survive; (2) river construction improvement,, storage fresh water on saline-alkali land for leaching supporting as irrigation and drainage, washing salinity by irrigation, hidden pipe salt discharge etc., although the salt discharge effect is obvious, the afforestation project cost that the fluting stringing makes increases greatly; (3) chemical modifying, add soil chemistry modifying agent technology, as superphosphate, detritus acid, acid-sludge etc., it is also fast to take effect, but newly-increased chemical substance has changed the physicochemical property of original soil, from a long-term perspective, single large tracts of land uses chemical improvement agent can increase environmental risk, as the change of edaphon kind; (4) biological modification, as by breeding, the screening salt-tolerant plant, though the method is also effective, time cycle is long but the plant after the improvement conforms, short-term response is slow, and directly selects the strong saline alkali tolerant plant of plantation, and plant variety is single, common halophytes such as alkali is fluffy, Chinese tamarisk, twocolor sealavander herb etc., all is that the herbaceous plant view is not good.
The PORT OF TIANJIN is adopted barged-in fill improvement greening technique first, with dredger and slush pump marine silt is built the warp that together forms by waterpower hydraulic reclamation heap exactly, it is under the prerequisite of not changing planting soil, based on the draining desalination, realize land improvement, have characteristics such as the fresh water of saving, saving engineering cost.Efficiently solve be becoming tight current PORT OF TIANJIN planting technique soil day in, avoided greening one side to destroy the opposing party's problem of environment again, to protecting environment significant.
Summary of the invention
The objective of the invention is to shortcoming and deficiency at prior art, a kind of local moulding of beach saline land terrace-type barged-in fill is provided, and the greening method that adopts the local moulding improvement of beach saline land terrace-type barged-in fill.The direct mound of the present invention is raised ground, has avoided fluting to break ground and has laid the operation of french drain, blind pipe, has simplified construction technology.Particularly by mixing debirs; improve barged-in fill as the method for planting soil and use the straw curtain to substitute tradition quarrel masonry for the method for pouring layer, effectively utilized refuse, protected natural resources; saved the greening cost more than 50%, the survival rate of plant reaches more than 90%.For achieving the above object, the invention discloses following technology contents:
A kind of local moulding of beach saline land terrace-type barged-in fill is characterized in that this part moulding comprises from bottom to top: infiltration ditch 1, basic landform barged-in fill 2, straw curtain 3, geotextiles 4, the planting soil 5 after the improvement, local moulding 6, inspection shaft 7; Wherein seep water ditch 1 at the vertical square sewer of excavation 0.5 * 0.5m of basic landform barged-in fill 2 lowest parts, in fill out particle diameter 10-12cm quarrel stone; Basis landform barged-in fill 2 is high 1-1.5m to ground, 15 °-30 ° of the gradients, lay the straw curtain 3 of the thick compacting of thickness 20-30cm on the landform barged-in fill of basis, shop geotextiles 4 on the straw curtain, repave improved planting soil 5 on the geotextiles, build to build the terraced fields on 45 ° on wide 0.5-1m, the high 0.5-1.0m of bank, bank slope at planting soil, in field face outer rim the high low bank of earth between fields of 0.15-0.2m is set, along contour interval 4m the high low bank of earth between fields of 0.15-0.2m is set again, forms the little furrow moulding 6 of 4 * 1m.
Described transformation back planting soil 5 refers to: mix organic barged-in fill, wherein barged-in fill and organic ratio of weight and number are 1:2.5.Organic ratio of weight and number is: stalk or the peat composed of rotten mosses: mud: desulfurated plaster: acid-sludge 1:1:0.2:0.2～1:1:0.5:0.5; Described infiltration ditch 1 peak has 0.3% the gradient to minimum point; Minimum point links to each other with greenery patches inspection shaft 7.
The present invention further discloses the greening method of the local moulding improvement of adopting beach saline land terrace-type barged-in fill, it is characterized in that being undertaken by following step:
(1) basic landform is done: air-dry barged-in fill is carried out the compacting of layering mound, the high 1-1.5m to ground, gradient 15-30 ° in the arrangement place; Described air-dry barged-in fill refers to: the barged-in fill at rivers or harbour, soil property is: for sand, sandy loam, total salt quantity up to 0.8-1.9%, pH value 7-8, water content 12%-15%;
(2) in slope end lowest part excavation infiltration ditch: the toe lowest part is the square sewer of excavation 0.5 * 0.5m vertically, in fill out particle diameter 10-12cm quarrel stone, be used for collecting the water that drenches under the layer row; Sewer peak to minimum point has 0.3% the gradient; Minimum point links to each other with the greenery patches inspection shaft;
(3) basic landform, the infiltration curtain that spreads straw on the ditch: the straw curtain of laying the thick compacting of 20-30cm on basic landform and the infiltration ditch;
(4) spread geotextiles on the straw curtain: the shop has the geotextiles of anticorrosion water permeability on the straw curtain;
(5) the improved barged-in fill in shop on the geotextiles: loose air-dry barged-in fill is piled on the geotextiles of completing soil thickness 1-1.5m after mixing organic matter; Described organic matter is the stalk pulverized or the peat composed of rotten mosses, mud, desulfurated plaster, acid-sludge, and the ratio of weight and number that mixes is stalk or the peat composed of rotten mosses: mud: desulfurated plaster: acid-sludge 1:1:0.2:0.2～1:1:0.5:0.5;
(6) local moulding: repair along the whole ground of sloping layering along the contour absolute altitude, build the terraced fields on 45 ° on wide 0.5-1m, the high 0.5-1m of bank, bank slope, in field face outer rim the high low bank of earth between fields of 0.15-0.2m is set, along contour interval 4m the high low bank of earth between fields of 0.15-0.2m is set again, form the little furrow of 4 * 1m;
(7) retaining washed out soil salinity: utilize natural precipitation or fresh water in rainy season, each little furrow retaining 0.15-0.2m treats to have oozed under the nature again and pours water, and measures soil salt after carrying out three times altogether;
(8) applying organic manure plowed soils: enrich the animal wastes of slaking on washed terraced fields cell surface, with the ratio of weight and number of barged-in fill to be improved be 1:1, turn over then and carry out fertilizing soil, measure the soil nutrient index;
(9) plant ornamental plant on the barged-in fill after the improvement: the ornamental plant that is planted in the growth of slight saline land.
Wherein the described organic matter of step (5) refers to stalk or the peat composed of rotten mosses: mud: desulfurated plaster: acid-sludge 1:1:0.2:0.2～1:1:0.5:0.5(ratio of weight and number).
The described animal wastes that enrich slaking of step of the present invention (8) refer to cow dung or chicken manure.The described ornamental plant of step (9) is Chinese wax, Chinese scholar tree, locust tree, Luan Shu, silk tree, the rose of Sharon, mountain peach.
The more detailed preparation method of the present invention is as follows:
The first step: the arrangement place, do basic landform: air-dry barged-in fill is carried out the compacting of layering mound, the high 1-1.5m to ground, gradient 15-30 °, purpose is to raise ground, lowering of watertable.
Second step: in slope end lowest part excavation infiltration ditch: the toe lowest part is the square sewer of excavation 0.5 * 0.5m vertically, in fill out particle diameter 10-12cm quarrel stone (commercial), be used for collecting the water that drenches under the layer row; Sewer peak to minimum point has 0.3% the gradient; Minimum point links to each other with the greenery patches inspection shaft.Purpose is to collect unnecessary water in the soil, prevents that subterranean water level from rising.
The 3rd goes on foot: curtain spreads straw on basic landform, the infiltration ditch: lay the straw curtain (commercial) of the thick compacting of 20-30cm on basic landform and the infiltration ditch, play isolation, salt discharge water.
The 4th step: spread geotextiles on the straw curtain: the shop has the geotextiles (commercial) of anticorrosion water permeability on the straw curtain, is used for isolation implant soil, and control soil enters into straw.
The 5th step: the improved barged-in fill in shop on the geotextiles: loose air-dry barged-in fill is piled on the geotextiles of completing soil thickness 1-1.5m after mixing organic matter.Organic matter is the stalk pulverized or the peat composed of rotten mosses (commercial), mud (sewage treatment plant's discarded object), desulfurated plaster (power plant discarded object), acid-sludge (vinegar processing factory waste residue), the ratio of weight and number ratio that mixes component is 1:1:0.2:0.2～1:1:0.5:0.5, and purpose increases the soil water permeability of barged-in fill.
The 6th step: local moulding: repair along the whole ground of sloping layering along the contour absolute altitude, build the terraced fields on 45 ° on wide 0.5-1m, the high 0.5-1m of bank, bank slope, in field face outer rim the high low bank of earth between fields of 0.15-0.2m is set, along contour interval 4m the high low bank of earth between fields of 0.15-0.2m is set again, form the little furrow of 4 * 1m, purpose is convenient to retaining.
The 7th step: retaining washed out soil salinity: utilize natural precipitation or fresh water in rainy season, each little furrow retaining 0.15-0.2m height is treated to have oozed under the nature again and is poured water, and measures soil salt after carrying out three times altogether.
The 8th step: applying organic manure plowed soils: enrich the animal wastes of slaking on washed terraced fields cell surface, with the ratio of weight and number of barged-in fill component of not improvement be 1:1, turn over then and carry out fertilizing soil, measure the soil nutrient index, the improvement back soil organic matter has all reached medium level (1.5-3.0%), the quick-acting nitrogen of soil rise to the above high level of 120mg/kg, soil quick-effective phosphor rises to the above higher level of 20mg/kg, quick-acting potassium content rises to the above high level of 120mg/kg, soil pH is reduced to 7.84-8.25, be fit to the plant growth, purpose provides the growth substrate with nutrient for plant.
The 9th step: plant ornamental plant on the barged-in fill after the improvement: plantation is adapted at the ornamental plant of slight saline land growth, as Chinese wax, Chinese scholar tree, locust tree, Luan Shu, silk tree, the rose of Sharon, mountain peach etc.
The traditional method of coastal saline-alkali greening is: build raised fields, periphery laying french drain and hidden pipe, pour water and press the aggregate measures of salt, applying organic manure, the strong salt tolerant alkali of plantation seeds.The effect of method of the present invention and traditional method compares: traditional method is concentrated period in rainfall, and subterranean water level rises gradually with the increase of rainfall, owing to be shallower than accumulation of salt in the surface soil critical depth, causes french drain and hidden pipe ineffective, the strong salification of soil; Also applied a large amount of fertilizers in the traditional method in the barged-in fill of drip washing, but owing to there is not the whole ground of moulding, soil nutrient is walked with water, can not well be protected the fertile soil of protecting; Behind the tradition soil improvement method, only be fit to the herbaceous plant growth of strong salt tolerant, be not suitable for the megaphanerophyte growth, can't play the whole structure of greening.
The present invention is conducive to retain rainwater in conjunction with the terrace-type moulding, and fully washed out soil reduces salinity, solves the problem of beach saline land afforestation freshwater resources deficiency simultaneously; Utilize landform and lay isolated materials such as permeable geotextiles, straw curtain, both can reach the purpose of salt discharge so that soil moisture is oozed under smooth and easy, effectively stop the basal layer soil salt to rise with capillary water simultaneously, suppressed accumulation of salt in the surface soil phenomenon; By mixing the refuses such as desulfurated plaster in sludge of sewage treatment plants behind stalk after the pulverizing or the peat composed of rotten mosses, the compost fermentation, acid-sludge, power plant, increased the porosity of barged-in fill, accelerate to ooze, avoided the salification phenomenon under the moisture, effectively reduce the pH value of washing behind the soil simultaneously, increased the fertility of soil; By the present invention, ornamental plant can be planted the tool appreciation effect and the plant of salt resistance is arranged, and as Chinese wax, Chinese scholar tree, locust tree, Luan Shu, silk tree, the rose of Sharon, mountain peach etc., survival rate is more than 90%.
The good effect that beach saline land terrace-type barged-in fill improvement greening method disclosed by the invention compared with prior art has is:
(1) the present invention is conducive to retain rainwater in conjunction with the terrace-type moulding, makes salinity obtain effective drip washing and reduces; Be conducive to protect the fertile soil of protecting, make the ornamental plant survival rate more than 90%.
(2) the present invention has avoided fluting to break ground and has laid the operation of french drain, blind pipe, has simplified construction technology.Particularly by mixing debirs, improve barged-in fill as the method for planting soil and use the straw curtain to substitute tradition quarrel masonry for the method for pouring layer, effectively utilized refuse, protected natural resources, saved the greening cost more than 50%.
Description of drawings:
Fig. 1 is the local modeling structure schematic diagram of beach saline land terrace-type barged-in fill;
Fig. 2 is the plane design drawing of the local moulding of beach saline land terrace-type barged-in fill;
1, infiltration ditch (interior filling quarrel stone); 2 basic landform barged-in fills;
3, straw curtain; 4, geotextiles; 5, the planting soil after the improvement; 6, local moulding; 7, inspection shaft.
Embodiment:
The present invention will be further described below in conjunction with specific embodiment, and following each embodiment only is used for explanation the present invention and is not limitation of the present invention.The animal wastes of used raw material stalk or the peat composed of rotten mosses (commercial), mud (sewage treatment plant's discarded object), desulfurated plaster (power plant discarded object), acid-sludge (vinegar processing factory waste residue), quarrel stone, slaking etc. externally all can have been bought.
Embodiment 1
A kind of local moulding of beach saline land terrace-type barged-in fill is characterized in that this part moulding comprises from bottom to top: infiltration ditch 1, basic landform barged-in fill 2, straw curtain 3, geotextiles 4, the planting soil 5 after the improvement, local moulding 6, inspection shaft 7; Wherein seep water ditch 1 at the vertical square sewer of excavation 0.5 * 0.5m of basic landform barged-in fill 2 lowest parts, in fill out particle diameter 10cm quarrel stone; Basis landform barged-in fill 2 is high 1m to ground, 15 ° of the gradients, lay the straw 3 of the thick compacting of thickness 30cm on the landform barged-in fill of basis, shop geotextiles 4 on the straw curtain, repave improved planting soil 5 on the geotextiles, build to build the terraced fields on 45 ° on wide 1m, the high 1m of bank, bank slope at planting soil, in field face outer rim the high low bank of earth between fields of 0.2m is set, along contour interval 4m the high low bank of earth between fields of 0.2m is set again, forms the little furrow moulding 6 of 4 * 1m; Described transformation back planting soil 5 refers to: mix organic barged-in fill, wherein barged-in fill and organic ratio of weight and number are 1:2.5.Organic ratio of weight and number is: stalk or the peat composed of rotten mosses: mud: desulfurated plaster: acid-sludge 1:1:0.2:0.2.Described infiltration ditch 1 peak has 0.3% the gradient to minimum point; Minimum point links to each other with greenery patches inspection shaft 7.
A kind of local moulding of beach saline land terrace-type barged-in fill is characterized in that this part moulding comprises from bottom to top: infiltration ditch 1, basic landform barged-in fill 2, straw curtain 3, geotextiles 4, the planting soil 5 after the improvement, local moulding 6, inspection shaft 7; Wherein seep water ditch 1 at the vertical square sewer of excavation 0.5 * 0.5m of basic landform barged-in fill 2 lowest parts, in fill out particle diameter 12cm quarrel stone; Basis landform barged-in fill 2 is high 1.5m to ground, 20 ° of the gradients, lay the straw 3 of the thick compacting of thickness 25cm on the landform barged-in fill of basis, shop geotextiles 4 on the straw curtain, repave improved planting soil 5 on the geotextiles, build to build the terraced fields on 45 ° on wide 0.5m, the high 1.0m of bank, bank slope at planting soil, in field face outer rim the high low bank of earth between fields of 0.2m is set, along contour interval 4m the high low bank of earth between fields of 0.2m is set again, forms the little furrow moulding 6 of 4 * 1m; Described transformation back planting soil 5 refers to: mix organic barged-in fill, wherein barged-in fill and organic ratio of weight and number are 1:2.5.Organic ratio of weight and number is: stalk or the peat composed of rotten mosses: mud: desulfurated plaster: acid-sludge 1:1:0.4:0.4; Described infiltration ditch 1 peak has 0.3% the gradient to minimum point; Minimum point links to each other with greenery patches inspection shaft 7.
Adopt the greening method of the local moulding improvement of beach saline land terrace-type barged-in fill, it is characterized in that being undertaken by following step:
(1) basic landform is done: air-dry barged-in fill is carried out the compacting of layering mound, the high 1m to ground, 25 ° of the gradients in the arrangement place; Described air-dry barged-in fill refers to: the barged-in fill at rivers or harbour, soil property is: for sand, sandy loam, total salt quantity up to 0.8-1.9%, pH value 7-8, water content 12%-15%;
(2) in slope end lowest part excavation infiltration ditch: the toe lowest part is the square sewer of excavation 0.5 * 0.5m vertically, in fill out particle diameter 10cm quarrel stone, be used for collecting the water that drenches under the layer row; Sewer peak to minimum point has 0.3% the gradient; Minimum point checks that with the greenery patches 7 wells link to each other;
(3) basic landform, the infiltration curtain that spreads straw on the ditch: the straw curtain of laying the thick compacting of 25cm on basic landform and the infiltration ditch;
(4) spread geotextiles on the straw curtain: the shop has the geotextiles of anticorrosion water permeability on the straw curtain;
(5) the improved barged-in fill in shop on the geotextiles: loose air-dry barged-in fill is piled on the geotextiles of completing soil thickness 1.5m after mixing organic matter; Described organic matter is the stalk pulverized or the peat composed of rotten mosses, mud, desulfurated plaster, acid-sludge, and the ratio of weight and number that mixes is: stalk or the peat composed of rotten mosses: mud: desulfurated plaster: acid-sludge 1:1:0.5:0.5;
(6) local moulding: repair along the whole ground of sloping layering along the contour absolute altitude, build the terraced fields on 45 ° on wide 1m, the high 0.6m of bank, bank slope, in field face outer rim the high low bank of earth between fields of 0.15m is set, along contour interval 4m the high low bank of earth between fields of 0.15m is set again, form the little furrow of 4 * 1m;
(7) retaining washed out soil salinity: utilize natural precipitation or fresh water in rainy season, each little furrow retaining 0.15m treats to have oozed under the nature again and pours water, and measures soil salt after carrying out three times altogether;
(8) applying organic manure plowed soils: enrich the animal wastes of slaking on washed terraced fields cell surface, with barged-in fill component ratio to be improved be 1:1, turn over then and carry out fertilizing soil, measure the soil nutrient index;
(9) plant ornamental plant on the barged-in fill after the improvement: the ornamental plant (for example Chinese wax, Chinese scholar tree, locust tree, Luan Shu, silk tree, the rose of Sharon or mountain peach all can) that is planted in the growth of slight saline land.
Embodiment 4
Be positioned at by the interim service area office building of prince wife Cao pasture, Hebei province ecological city, experiment soil is the ooze barged-in fill, and soil property is sandy loam, total salt 1.36%, pH value 7.72.
(1) barged-in fill with water content 12% carries out the compacting of layering mound, the high 1.5m to ground, and 25 ° of the gradients are as basic landform;
(2) the vertical square sewer of excavation 0.5 * 0.5m of toe lowest part, in fill out particle diameter 10cm quarrel stone; The sewer peak is to minimum point gradient 0.3%, and minimum point links to each other with the greenery patches inspection shaft;
(3) the straw curtain of the thick compacting of laying 30cm on basic landform and the infiltration ditch;
(4) shop one deck has the geotextiles of anticorrosion water permeability on the straw curtain;
(5) the hydraulic reclamation mound that will mix the stalk pulverized, mud, desulfurated plaster, acid-sludge is on the straw curtain, soil thickness 1.5m, and the ratio of weight and number that mixes the component of thing is 1:1:0.25:0.25;
(6) along the whole ground of sloping layering, build the terraced fields on 45 ° on wide 1m, the high 1m of bank, bank slope, in field face outer rim the low bank of earth between fields of high 0.2 * 0.2m is set, along contour interval 4m the low bank of earth between fields of 0.2 * 0.2m is set again, form the little furrow of 4 * 1m;
(7) go into the high fresh water of 0.2m to each little border irrigation, treat to have oozed under the nature and continue again to pour water, carry out altogether three times;
(8) enrich the animal wastes of slaking in component ratio 1:1 on washed terraced fields cell surface, the plants such as plantation Chinese wax, Chinese scholar tree, locust tree, Luan Shu, the silk tree rose of Sharon, mountain peach of turning over, plant survival rate 95%.
The desalination test effect of table 1 chiltern barged-in fill
| The frequency of irrigation index | Initial soil | After 1 time | Behind 2 | Behind | 3 water |
| Total salt (%) | 1.36 | 0.917 | 0.544 | 0.238 | |
| pH | 7.72 | 7.92 | 8.06 | 8.12 |
Nutrient before and after the improvement of table 2 sandy loam matter barged-in fill changes
Cost relatively
Table 3 cost relatively
Embodiment 6
Plant the effect of method for planting and plant
Conclusion:
(1) retains rainwater, raises under the landform acceleration moisture and ooze by the terrace-type moulding, realize that finally soil salt obtains effective drip washing, has suppressed accumulation of salt in the surface soil phenomenon;
(2) terrace-type moulding is conducive to protect soil and protects fertilizer, and the plant growing way does very well;
(3) the terrace-type greening method of moulding of improving the soil, the tradition greening mode of improving the soil, plant survival rate improves more than 2 times.
Claims (7)
1. the local moulding of a beach saline land terrace-type barged-in fill is characterized in that this part moulding comprises from bottom to top: infiltration ditch (1), basic landform barged-in fill (2), straw curtain (3), geotextiles (4), the planting soil after the improvement (5), local moulding (6), inspection shaft (7); The ditch (1) that wherein seeps water vertically excavates the square sewer of 0.5 * 0.5m at basic landform barged-in fill (2) lowest part, in fill out particle diameter 10-12cm quarrel stone; Basis landform barged-in fill (2) is high 1-1.5m to ground, 15 °-30 ° of the gradients, lay the straw curtain (3) of the thick compacting of thickness 20-30cm on the landform barged-in fill of basis, spread geotextiles (4) on the straw curtain, repave improved planting soil (5) on the geotextiles, build to build the terraced fields on 45 ° on wide 0.5-1m, the high 0.5-1.0m of bank, bank slope at planting soil, in field face outer rim the high low bank of earth between fields of 0.15-0.2m is set, along contour interval 4m the high low bank of earth between fields of 0.15-0.2m is set again, forms the little furrow moulding (6) of 4 * 1m; Described transformation back planting soil (5) refers to: mix organic barged-in fill, wherein barged-in fill and organic ratio of weight and number are 1:2.5.
2. the local moulding of beach saline land terrace-type barged-in fill according to claim 1, it is characterized in that organic ratio of weight and number is: stalk or the peat composed of rotten mosses: mud: desulfurated plaster: acid-sludge 1:1:0.2:0.2～1:1:0.5:0.5.
3. the local moulding of beach saline land terrace-type barged-in fill according to claim 1 is characterized in that described infiltration ditch (1) peak has 0.3% the gradient to minimum point; Minimum point links to each other with greenery patches inspection shaft (7).
4. greening method that adopts the local moulding improvement of beach saline land terrace-type barged-in fill is characterized in that being undertaken by following step:
(1) basic landform is done: air-dry barged-in fill is carried out the compacting of layering mound, the high 1-1.5m to ground, gradient 15-30 ° in the arrangement place; Described air-dry barged-in fill refers to: the barged-in fill at rivers or harbour, soil property is: for sand, sandy loam, total salt quantity up to 0.8-1.9%, pH value 7-8, water content 12%-15%;
(2) in slope end lowest part excavation infiltration ditch: the toe lowest part is the square sewer of excavation 0.5 * 0.5m vertically, in fill out particle diameter 10-12cm quarrel stone, be used for collecting the water that drenches under the layer row; Sewer peak to minimum point has 0.3% the gradient; Minimum point links to each other with the greenery patches inspection shaft;
(3) basic landform, the infiltration curtain that spreads straw on the ditch: the straw curtain of laying the thick compacting of 20-30cm on basic landform and the infiltration ditch;
(4) spread geotextiles on the straw curtain: the shop has the geotextiles of anticorrosion water permeability on the straw curtain;
(5) the improved barged-in fill in shop on the geotextiles: loose air-dry barged-in fill is piled on the geotextiles of completing soil thickness 1-1.5m after mixing organic matter; Described organic matter is the stalk pulverized or the peat composed of rotten mosses, mud, desulfurated plaster, acid-sludge;
(6) local moulding: repair along the whole ground of sloping layering along the contour absolute altitude, build the terraced fields on 45 ° on wide 0.5-1m, the high 0.5-1.0m of bank, bank slope, in field face outer rim the high low bank of earth between fields of 0.15-0.2m is set, along contour interval 4m the high low bank of earth between fields of 0.15-0.2m is set again, form the little furrow of 4 * 1m;
(7) retaining washed out soil salinity: utilize natural precipitation or fresh water in rainy season, each little furrow retaining 0.15-0.2m treats to have oozed under the nature again and pours water, and measures soil salt after carrying out three times altogether;
(8) applying organic manure plowed soils: enrich the animal wastes of slaking on washed terraced fields cell surface, with hydraulic reclamation local soil type ratio of weight and number to be improved be 1:1, turn over then and carry out fertilizing soil, measure the soil nutrient index;
(9) plant ornamental plant on the barged-in fill after the improvement: the ornamental plant that is planted in the growth of slight saline land.
5. the described greening method of claim 4, wherein the described organic matter of step (5) refers to stalk or the peat composed of rotten mosses: mud: desulfurated plaster: the ratio of weight and number of acid-sludge is 1:1:0.2:0.2～1:1:0.5:0.5.
6. the described greening method of claim 4, wherein the described animal wastes that enrich slaking of step (8) refer to cow dung or chicken manure.
7. the described greening method of claim 4, wherein the described ornamental plant of step (9) is Chinese wax, Chinese scholar tree, locust tree, Luan Shu, silk tree, the rose of Sharon or mountain peach.
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