CN101647335A - Greening technique for improving clay soil in drought areas - Google Patents
Greening technique for improving clay soil in drought areas Download PDFInfo
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- CN101647335A CN101647335A CN200910113283A CN200910113283A CN101647335A CN 101647335 A CN101647335 A CN 101647335A CN 200910113283 A CN200910113283 A CN 200910113283A CN 200910113283 A CN200910113283 A CN 200910113283A CN 101647335 A CN101647335 A CN 101647335A
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Abstract
The invention provides a greening technique for improving clay soil in drought areas, which comprises the following steps: firstly, digging out the original soil by 60-100 cm; secondly, laying a gravel layer of 20-30 cm on the bottom; thirdly, laying a geotechnical drape on the gravel, making holes in the geotechnical drape with the density of 8-12/square meter, and the diameter of the hole is preferably 2-3 cm; and fourthly, laying 40-70 cm of cultivated soil on the geotechnical drape. The content of stone blocks and sand in the cultivated soil is smaller than 15%, the cultivated soil shouldnot contain stone blocks and foreign matters of which the diameter is greater than 25 mm, the total salt content of the soil should be smaller than 2.2ms/cm, and the pH value is smaller than 8.5. Thetechnique is suitable for surface-form soil-displacement transformation and not suitable for cave-like soil-displacement transformation, and requires a minimum of 1 meter of the embedded depth of theunderground water. The technique aims to improve the clay soil; on the basis of sufficient analysis on the generation principle of salinization, the invention utilizes the greening technique; and therefore, the technique fundamentally solves the problems of salinization and secondary salinization of the green land soil, ensures the long-term effect for greening and has the advantages of short operation period, low cost and strong operability. From 2006 to 2008, the lawns, and arbor and shrub tree species for trial plantation are successful for three successive years, which sufficiently verifies the value and the practicality of the application and the popularization of the greening technique in drought areas.
Description
Technical field
The present invention relates to soil melioration, prevent that especially the salination of clayey soil from taking place, the greening technique of suitable especially improving clay soil in drought areas.
Background technology
At present, in arid, semiarid zone, one of outstanding problem that often runs in transforming human residential environment, enforcement afforestation project is exactly the soil salinization and secondary salinization problem, often directly affects the afforestation project effect, even leads to the failure.Especially clayey soil, this problem is the most outstanding.This mainly is that, evaporation strong weather background few by the arid biogeographic zone rainfall and clayey soil bad hydraulic permeability, the strong characteristic of the poly-effect of table cause jointly, and the salination phenomenon very easily takes place after irrigation, and this point has fully been verified in the big reclamation of wasteland of the fifties.To this, the people of arid biogeographic zone never abandon preventing and administering the soil salinization and secondary salinization.
Saliferous control has had many mature technique in activity in production, but is applicable to large-scale agricultural production mostly, as: dig draining (alkali) canal (net), stress the row's of filling balance.At present, some new technology have also appearred, as: ridge shape farming, high frequency water-saving irrigation etc.For the garden afforestation project, general afforested areas area is less relatively, and the plot disperses, and many and other building mixes, and soil condition is had relatively high expectations.For being prone to saliferous location, especially clayey soil, mainly be at present to adopt the mold of changing certain depth or bury the mode of oozing the pipe draining underground.The former timeliness is short, often can not solve root problem, and latter's shape conditional request height over the ground, the construction costs height, and the construction technology complexity, and have long-time running line clogging, problem difficult in maintenance.The present invention can remedy above-mentioned deficiency, remarkable result not only aspect afforestation and irregular little plot green soil transformation especially, and can reduce construction costs greatly.
Summary of the invention
The objective of the invention is: in the afforestation project of arid area, the saliferous problem that clayey soil very easily takes place in afforestation soil, fully resolve the salination genesis mechanism the basis on, take the engineering measure of place mat gravel, geotextiles and soil moved in to improve the original, fundamentally solve the green land soil salinization and secondary salinization problem, and guarantee the long-term effect of greening, the duration is short, cost is low, and is workable.
The object of the present invention is achieved like this: the greening technique of improving clay soil in drought areas, and the enforcement of step: the one, cut out the certain depth original soil; The 2nd, evenly lay gravel 1 in the bottom; The 3rd, the geotextiles 3 of on gravel 1, laying uniform hole 2; The 4th, go into mold 4 the upper strata of geotextiles 3 visitor.
Above-mentioned greening technique, the thickness of the original soil that cuts out is generally 60-100cm and gets final product.
Described greening technique, place mat gravel 1 thickness is generally 20-30cm and gets final product, and the gravel average grain diameter is not less than 2mm.
Above-mentioned greening technique, hole 2 numbers of making geotextiles 3 are no less than 8-12/square metre, are advisable for diameter 2-3 centimetre.
Described greening technique, place mat mold 4 thickness are generally 40-70cm and get final product.
Above-mentioned greening technique, gravel content should must not contain chad and foreign material greater than 25mm less than 15% in the mold 4, and the total salt amount of soil should be less than 2.2ms/cm, and pH value is less than 8.5.
Described greening technique, this technology is fit to planar soil removal and replacement transformation, is not suitable for cave-shaped soil removal and replacement transformation, requires bury of groundwater to be not less than 1 meter simultaneously.
Greening technique of the present invention, going into mold thickness place mat gravel thickness and visitor should use flexibly according to actual afforestation project characteristics, generally can be divided into 3 types: type one is that arbor is concentrated the more scape green land (containing the lawn) of making, shoveling 100cm, gravel thickness 30cm, mold thickness 70cm.Type two is that flowers, shrub and small part arbor are the green land (containing the lawn) of main entourage, shoveling 80cm, gravel thickness 20cm, mold thickness 60cm.Type three is green lands of flowers and plants and undershrub entourage.Shoveling 60cm, gravel thickness 20cm, mold thickness 40cm.
Know-why of the present invention is: cut out undisturbed soil, the gravel layer that lay the bottom is the macrovoid soil structure, can stop or weaken the transportation that the bottom soil salt makes progress, and can also become the unnecessary place of pouring water of temporary transient storage upper strata seepage simultaneously; Geotextiles on the gravel can further be blocked the transportation of lower floor's moisture (salinity) to top on the one hand, can block on the other hand because long-term migration of irrigating the tiny soil particle of top soil that causes to gravel layer, has guaranteed the soil structure of gravel layer; Uniform hole can guarantee that the unnecessary of upper strata seepage pour water to the migration of lower floor on it; The above mold of changing of geotextiles can guarantee the normal growth of lawn and shrub, has avoided saliferous generation.
The present invention is applied in being located in the Sang Ji oil field virescence rebuild engineering at Takla Makan Desert edge, Xinjiang.This district belongs to the continental arid climate in warm temperate zone, the precipitation rareness, and evaporation is strong; Soil is typical cement solonchak, and the average salt content of soil reaches 5.4g/kg, and the degree of mineralization of ground water should once repeatedly be afforested in the district, all owing to soil accumulation of salt in the surface soil factor is failed before this up to 31.95g/l.Engineering is taked the method for the above-mentioned type two, built 10000 square metres green grassland, flowers and plants such as ornamental shrubs such as water is cured, flowering plum, the capsule of weeping forsythia, shrubby flase indigo and frost flower, petunia, drummond phlox, pot marigold, high mountain accumulated snow, Parthenocissus quinuefolia, Festuca Arundinacea, annual bluegrass have been planted, and arbor species such as jujube tree, willow, elm, big Ye Baila, weeping willow have been disposed, greening has obtained success, oil field, depopulated zone worker's production, living environment have been improved greatly, so far 3 years, effect was lasting, significantly.
The present invention conceived cuts out undisturbed soil, lays gravel, makes up the macrovoid soil structure, and in conjunction with the geotextiles of laying hole with holes, both blocked the transportation that the bottom soil salt makes progress, oozed under the nature that has guaranteed again to pour water, and made gravel layer become the place of temporary transient storage percolation water.This technology path science, reliable has effectively solved the problem of clayey soil salination and secondary salinization in the afforestation project, guarantees the long-term effect of greening, and the duration is short, and cost is low, and is workable, shows technological progress.
Description of drawings
The invention will be further described below in conjunction with accompanying drawing.
Figure is the generalized section of the greening technique of improving the soil of invention;
Among the figure:
The 1-gravel
The 2-hole
The 3-geotextiles
The 4-mold
As figure, shown in: through improving the soil, bottom place mat gravel 1 (or Gobi desert stone), the geotextiles 3 that is equipped with hole 2 is laid on its upper strata, then mold 4 visitors is gone into, and can implement planting technique.
Embodiment
6 procedures of technical matters flow process:
1. cut out original soil
Promptly for the plot of needs transformation, cut out the original soil of certain depth as required, requirement reaches the degree of depth, the bottom surface is smooth.The original soil that cuts out roping is in time walked, and prevents to mix with soil moved in to improve the original.
2. place mat gravel
Place mat gravel layer at first at the bottom of cutting out the hole of original soil requires to reach thickness, evenly smooth, and the gravel average grain diameter is not less than 2mm, does not pursue uniform particle diameter.
3. shop geotextiles
Place mat one deck geotextiles on gravel layer, require open and flat, corrugationless.
4. geotextiles burrows
Beat (scalding) hole on the geotextiles of place mat, the hole number is no less than 8-12/square metre, diameter 2-3 centimetre.This operation also can be prefabricated before the geotextiles of shop.
5. mold is filled out in the shop
Mold is filled out on geotextiles upper berth at place mat, requires to reach specific thickness, but must not surpass the original ground height.The mold of changing requires to be loamy soil loose, that be rich in organic matter.Gravel content should be less than 15% in the soil, shows native face and must not contain chad and foreign material greater than 25mm, and the total salt amount of soil should be less than 2.2ms/cm, and pH value is less than 8.5.
6. smooth green land
After mold is filled out in the shop, in time flatten, evenly pouring water then makes its sedimentation, flattens once more after do on the top layer to get final product.
Claims (7)
1, the greening technique of improving clay soil in drought areas is characterized in that: the enforcement of step: the one, level land, and cut out the certain depth original soil; The 2nd, lay even gravel (1) in the bottom; The 3rd, go up laying uniform hole (2) geotextiles (3) at gravel (1); The 4th, go into mold (4) the upper strata visitor of geotextiles (3);
2, greening technique according to claim 1 is characterized in that: the thickness of the original soil that cuts out is generally 60-100cm and gets final product.
3, greening technique according to claim 1 is characterized in that: place mat gravel (1) thickness is generally 20-30cm and gets final product, and the gravel average grain diameter is not less than 2mm.
4, greening technique according to claim 1 is characterized in that: hole (2) number of making geotextiles (3) is no less than 8-12/square metre, is advisable for diameter 2-3 centimetre.
5, greening technique according to claim 1 is characterized in that: place mat mold (4) thickness is generally 40-70cm and gets final product.
6, greening technique according to claim 1 is characterized in that: gravel content should must not contain chad and foreign material greater than 25mm less than 15% in the mold (4), and the total salt amount of soil should be less than 2.2ms/cm, and pH value is less than 8.5.
7, greening technique according to claim 1 is characterized in that: this technology is fit to planar soil removal and replacement transformation, is not suitable for cave-shaped soil removal and replacement transformation, requires bury of groundwater to be not less than 1 meter simultaneously.
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910113283XA CN101647335B (en) | 2009-04-08 | 2009-04-08 | Greening technique for improving clay soil in drought areas |
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| Application Number | Priority Date | Filing Date | Title |
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| CN200910113283XA CN101647335B (en) | 2009-04-08 | 2009-04-08 | Greening technique for improving clay soil in drought areas |
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| CN101647335A true CN101647335A (en) | 2010-02-17 |
| CN101647335B CN101647335B (en) | 2011-01-19 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102197726A (en) * | 2011-06-03 | 2011-09-28 | 兰州大学 | Method for improving seriously saline-alkali land of oasis area and planting high-quality lawn |
| CN102232328A (en) * | 2010-04-30 | 2011-11-09 | 北京仁创科技集团有限公司 | Method for improving saline-alkali soil and planting method for saline-alkali soil |
| CN102518112A (en) * | 2011-11-29 | 2012-06-27 | 敦煌研究院 | Method for restoring ecology of desertified land in arid region |
| CN104396541A (en) * | 2014-12-11 | 2015-03-11 | 中国科学院新疆生态与地理研究所 | Long-acting improvement method for improving original slat stain soil of farmland in draughty region |
| CN112544156A (en) * | 2020-12-03 | 2021-03-26 | 四川云辰园林科技有限公司 | Method for breaking rock and improving soil in barren land |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1149912C (en) * | 2001-06-15 | 2004-05-19 | 河北绿洲生态环境科技有限公司 | Comprehensive ecological vegetation planting method for use in desertificated area |
| CN1587528A (en) * | 2004-09-16 | 2005-03-02 | 北京玖久时代科技发展有限公司 | Method for construction of artificial lawn |
| CN100355511C (en) * | 2004-10-28 | 2007-12-19 | 刘太祥 | Water-saving type salina physics-chemistry-biology comprehensive improvement and vegetation construction technique |
-
2009
- 2009-04-08 CN CN200910113283XA patent/CN101647335B/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102232328A (en) * | 2010-04-30 | 2011-11-09 | 北京仁创科技集团有限公司 | Method for improving saline-alkali soil and planting method for saline-alkali soil |
| CN102232328B (en) * | 2010-04-30 | 2014-06-04 | 北京仁创科技集团有限公司 | Method for improving saline-alkali soil and planting method for saline-alkali soil |
| CN102197726A (en) * | 2011-06-03 | 2011-09-28 | 兰州大学 | Method for improving seriously saline-alkali land of oasis area and planting high-quality lawn |
| CN102197726B (en) * | 2011-06-03 | 2013-02-13 | 兰州大学 | Method for improving seriously saline-alkali land of oasis area and planting high-quality lawn |
| CN102518112A (en) * | 2011-11-29 | 2012-06-27 | 敦煌研究院 | Method for restoring ecology of desertified land in arid region |
| CN102518112B (en) * | 2011-11-29 | 2016-01-20 | 敦煌研究院 | The method of arid biogeographic zone Desertification Soil ecological recovery |
| CN104396541A (en) * | 2014-12-11 | 2015-03-11 | 中国科学院新疆生态与地理研究所 | Long-acting improvement method for improving original slat stain soil of farmland in draughty region |
| CN104396541B (en) * | 2014-12-11 | 2016-08-24 | 中国科学院新疆生态与地理研究所 | A kind of original soil long-acting modification method of arid biogeographic zone farmland salting stain |
| CN112544156A (en) * | 2020-12-03 | 2021-03-26 | 四川云辰园林科技有限公司 | Method for breaking rock and improving soil in barren land |
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| CN101647335B (en) | 2011-01-19 |
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