CN104838753A - Improvement method of coastal saline land - Google Patents
Improvement method of coastal saline land Download PDFInfo
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- CN104838753A CN104838753A CN201510237744.XA CN201510237744A CN104838753A CN 104838753 A CN104838753 A CN 104838753A CN 201510237744 A CN201510237744 A CN 201510237744A CN 104838753 A CN104838753 A CN 104838753A
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Abstract
The invention discloses an improvement method of a coastal saline land. The improvement method comprises the following steps: A, ditching underground of a soil layer of a saline land to be improved, laying a closed conduit and forming a closed conduit draining layer; B, performing deep scarification on the saline land soil layer located at the upside of the closed conduit draining layer; C, performing the laser flattening on the saline land soil layer after the deep scarification; D, applying desulfurization gypsum to the soil after the laser flattening; E, mixing the desulfurization gypsum with soil evenly; F, filling water and irrigating the land to remove salt and alkali. The improvement method has the following advantages: salt and alkali removal of the coastal saline land can be quickly carried out; soil pore space is effectively bettered, and soil infiltration ability is improved; water soluble salt sprayed from the soil rapidly and replaced exchange salt are discharged through the closed conduit; the improvement method is high in economical efficiency and high in practicability.
Description
Technical field
The invention belongs to alkaline land improving field of engineering technology, be specifically related to a kind of beach saline land improvement method.
Background technology
China is distributed with large stretch of saline land, and the degree of salinization of soil expands, such as coastal region.Beach saline land mostly is high sodium salt Muddy Bottoms marine facies fines clay, soil permeability is poor, and topsoil hardens by being formed very soon after precipitation or irrigation water immersion, Infiltration Characteristics in Field Soils reduces further, under heavy rain or Rainfall Condition, moisture is easy to form top layer runoff and discharges, due to the stop of the closely knit flour sand mud of soil, Infiltration enters soil body drip washing salinity and the ratio of being discharged by hidden pipe is lower, hidden pipe quick desalination DeGrain; It is poor that the hydrogeologic condition of beach saline land determines soil body section aeration status, and be unfavorable for that plant root growth and plant are to the absorption desalination of salinity, bury of groundwater is shallow in addition, the desalination soil body very easily accumulation of salt in the surface soil, adds desalting salinized soil and changes alkali difficulty of governance.Therefore, the quick desalination of beach saline land changes alkali and is still a problem demanding prompt solution.
Summary of the invention
The present invention is intended at least one of solve the problems of the technologies described above.
For this reason, one object of the present invention is to adopt that Subsoiling breaks the closely knit flour sand mud of soil, desulfurated plaster chemical ion displacement reaction increases soil permeability, closed drainage suppress the integrated approach of the accumulation of salt in the surface soil, realizes quick desalination of coastal saline soil dealkalize and prevents the object of the accumulation of salt in the surface soil.
To achieve these goals, the embodiment of a first aspect of the present invention discloses a kind of beach saline land improvement method, comprises the following steps:
A: at soil layer underground, saline land to be improved trench digging, bury hidden pipe underground, form closed drainage layer;
B: the described saline land soil layer be positioned on the upside of described closed drainage layer is carried out subsoiling;
C: laser land leveling is carried out to described saline land soil layer after subsoiling;
D: desulfurated plaster is applied to the soil after laser land leveling;
E: desulfurated plaster is mixed with described soil;
F: desalinization of soil by flooding or leaching row alkali of irrigating the fields of pouring water.
According to a kind of beach saline land improvement method of the embodiment of the present invention, alkali is changed to the quick desalination of beach saline land; Effectively improve soil pore space situation, improve Infiltration Characteristics in Field Soils; The Water-soluble salt that can promptly be got off by the leaching in soil and the exchangeability salinity of replacing are drained through hidden pipe; Economy is high, practicality is high.
In addition, a kind of beach saline land improvement method according to the above embodiment of the present invention, can also have following additional technical characteristic:
Further, in step, the hidden pipe depth of burying of described closed drainage layer is 70 ~ 90cm.
Further, the spacing of burying underground of described hidden pipe is 8 ~ 18m, and hidden pipe tilts to delivery port direction.
Further, in stepb, the thickness of described Subsoiling is 40 ~ 60cm.
Further, in step C, the soil difference in height after subsoiling is no more than 5cm.
Further, the amount of application of described desulfurated plaster is 25 ~ 35t/hm
2.
Further, in step e, with rotovator, desulfurated plaster and salt affected soil top layer 0-20cm soil to be improved are mixed.
Further, in step e, with rotovator, desulfurated plaster and salt affected soil top layer 0-20cm soil to be improved are mixed.
Additional aspect of the present invention and advantage will part provide in the following description, and part will become obvious from the following description, or be recognized by practice of the present invention.
Embodiment
Be described below in detail embodiments of the invention, embodiment is exemplary, only for explaining the present invention, and can not be interpreted as limitation of the present invention.
Embodiment 1
Choose one piece of beach saline land, first hidden pipe is embedded in the soil layer 80cm depths, saline land for the treatment of desalination, both can ensure that the hidden pipe laying degree of depth exceeded the thickness of Subsoiling, and higher underground water can have been discharged smoothly again.
Hidden pipe is 0.6 ° to inclination angle, delivery port direction, the ponding in hidden pipe can be discharged smoothly.
Spacing buried underground by hidden pipe is 18m, and hidden pipe place is guided in the irrigation infiltration in saline-alkali soil soil layer to be improved and underground water.
The saline and alkaline subsoiling thickness to be improved by subsoiler subsoiling is 40cm, the loosing soil that plow layer can be hardened, also can break the closely knit flour sand mud of soil, so that desulfurated plaster can arrive soil smoothly and salt affected soil carries out chemical ion displacement reaction simultaneously.
Carry out laser land leveling after subsoiling, in each plot, soil depth displacement is no more than 5cm.
Through soil sampling analytical test, the basicity of this plot soil is 8% ~ 10%, and the amount of application of desulfurated plaster is 25t/hm
2.After being evenly sprinkled into desulfurated plaster, described desulfurated plaster is the desulfuration waste that coal-burning power plant's wet process of FGD produces, main component in desulfurated plaster is calcium sulphate (mass percent is 80%), the effect mainly chemical ion displacement reaction of desulfurated plaster, calcium ion in desulfurated plaster can replace the sodium ion on soil colloid, the granular structure of soil is made to become loose, effectively improve soil pore space situation, improve Infiltration Characteristics in Field Soils, thus the soil body salinity of irrigation and drainage and rain infiltration drip washing is drained by hidden pipe smoothly, reach and reduce saline-alkali soil pH value, the object of basicity and total alkalinity.
With rotovator, desulfurated plaster and salt affected soil to be improved are mixed, then washing salinity by irrigation, irrigation quantity 120 cubic metres/mu.
After implementing above-mentioned comprehensive improvement measure, in 1 year, the basicity of soil is reduced to 5 ~ 7%, and the salt content of soil also obviously reduces, soil condition be improved significantly.
Embodiment 2
Choose one piece of beach saline land, first hidden pipe is embedded in the soil layer 90cm depths, saline land for the treatment of desalination, both can ensure that the hidden pipe laying degree of depth exceeded the thickness of Subsoiling, and higher underground water can have been discharged smoothly again.
Hidden pipe is 0.8 ° to inclination angle, delivery port direction, the ponding in hidden pipe can be discharged smoothly.
Spacing buried underground by hidden pipe is 12m, and hidden pipe place is guided in the irrigation infiltration in saline-alkali soil soil layer to be improved and underground water.
The saline and alkaline subsoiling thickness to be improved by subsoiler subsoiling is 50cm, the loosing soil that plow layer can be hardened, also can break the closely knit flour sand mud of soil, so that desulfurated plaster can arrive soil smoothly and salt affected soil carries out chemical ion displacement reaction simultaneously.
Carry out laser land leveling after subsoiling, in each plot, soil depth displacement is no more than 5cm.
Through soil sampling analytical test, the basicity of soil is 15% ~ 20%, and the amount of application of desulfurated plaster is 35t/hm
2.After being evenly sprinkled into desulfurated plaster, described desulfurated plaster is the desulfuration waste that coal-burning power plant's wet process of FGD produces, main component in desulfurated plaster is calcium sulphate (mass percent is 80%), the effect mainly chemical ion displacement reaction of desulfurated plaster, calcium ion in desulfurated plaster can replace the sodium ion on soil colloid, the granular structure of soil is made to become loose, effectively improve soil pore space situation, improve Infiltration Characteristics in Field Soils, thus the soil body salinity of irrigation and drainage and rain infiltration drip washing is drained by hidden pipe smoothly, reach and reduce saline-alkali soil pH value, the object of basicity and total alkalinity.
With rotovator, desulfurated plaster and salt affected soil to be improved are mixed, then washing salinity by irrigation, irrigation quantity 150 cubic metres/mu, fill with row 2 times.
After implementing above-mentioned comprehensive improvement measure, in 1 year, the average basicity of soil is reduced to 6% ~ 10%, and the salt content of soil also obviously reduces, soil condition be improved significantly.
In addition, other formation of the beach saline land improvement method of the embodiment of the present invention and effect are all known for a person skilled in the art, in order to reduce redundancy, do not repeat.
In the description of this specification, specific features, structure, material or feature that the description of reference term " embodiment ", " some embodiments ", " example ", " concrete example " or " some examples " etc. means to describe in conjunction with this embodiment or example are contained at least one embodiment of the present invention or example.In this manual, identical embodiment or example are not necessarily referred to the schematic representation of above-mentioned term.And the specific features of description, structure, material or feature can combine in an appropriate manner in any one or more embodiment or example.
Although illustrate and describe embodiments of the invention, those having ordinary skill in the art will appreciate that: can carry out multiple change, amendment, replacement and modification to these embodiments when not departing from principle of the present invention and aim, scope of the present invention is by claim and equivalency thereof.
Claims (8)
1. a beach saline land improvement method, is characterized in that, comprises the following steps:
A: at soil layer underground, saline land to be improved trench digging, bury hidden pipe underground, form closed drainage layer;
B: the described saline land soil layer be positioned on the upside of described closed drainage layer is carried out subsoiling;
C: laser land leveling is carried out to described saline land soil layer after subsoiling;
D: desulfurated plaster is applied to the soil after laser land leveling;
E: desulfurated plaster is mixed with described soil;
F: desalinization of soil by flooding or leaching row alkali of irrigating the fields of pouring water.
2. the beach saline land improvement method according to claim 1, is characterized in that, in step, the hidden pipe depth of burying of described closed drainage layer is 70 ~ 90cm.
3. the beach saline land improvement method according to claim 1 or 2, is characterized in that, the spacing of burying underground of described hidden pipe is 8 ~ 18m, and hidden pipe tilts to delivery port direction.
4. the beach saline land improvement method according to claim 1, is characterized in that, in stepb, the thickness of described Subsoiling is 40 ~ 60cm.
5. the beach saline land improvement method according to claim 1 or 4, is characterized in that, in step C, the soil difference in height after subsoiling is no more than 5cm.
6. the beach saline land improvement method according to claim 1, is characterized in that, the amount of application of described desulfurated plaster is 25 ~ 35t/hm
2.
7. beach saline land improvement method according to claim 1, is characterized in that, in step e, desulfurated plaster and salt affected soil top layer 0-20cm soil to be improved is mixed with rotovator.
8. the beach saline land improvement method according to claim 1 or 7, is characterized in that, in step F, irrigation quantity 100 cubic metres/mu ~ 150 cubic metres/mu, lavation number of times is 1 to 3 time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510237744.XA CN104838753A (en) | 2015-05-12 | 2015-05-12 | Improvement method of coastal saline land |
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| CN201510237744.XA CN104838753A (en) | 2015-05-12 | 2015-05-12 | Improvement method of coastal saline land |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105359663A (en) * | 2015-11-30 | 2016-03-02 | 天津吉天环境科技发展有限公司 | Improvement method for soil of saline and alkaline land |
| CN105940806A (en) * | 2016-05-13 | 2016-09-21 | 福建农林大学 | Salinized soil composite restoration method effectively inhibiting salinization |
| CN105960877A (en) * | 2016-05-13 | 2016-09-28 | 福建农林大学 | Coast salinized soil improvement method improving plough layer soil nitrogen immobilization capability |
| CN106171428A (en) * | 2016-07-15 | 2016-12-07 | 山东胜伟园林科技有限公司 | A kind of method of desulfurated plaster improvement alkali-affected soil plantation Helianthi |
| CN107409522A (en) * | 2017-07-18 | 2017-12-01 | 天津港(集团)有限公司 | A kind of method that soil structure of coastal dredger fills is improved using mushroom bran base composite high-water-absorptivresin resin |
| CN108076719A (en) * | 2018-01-04 | 2018-05-29 | 中国科学院南京土壤研究所 | A kind of engineering improvement on heavy salinized ground of haftplatte and ecological planting and establishing method |
| CN108184358A (en) * | 2018-01-12 | 2018-06-22 | 郑晓华 | A kind of physics and the effective ways in bioconjugation improvement salt-soda soil |
| CN112205111A (en) * | 2020-07-21 | 2021-01-12 | 中国矿业大学(北京) | Method for improving soil of open pit coal mine dump by desulfurized gypsum |
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| CN103329658A (en) * | 2013-06-21 | 2013-10-02 | 河海大学 | Sectional three-dimensional structure for fast desalting and soil improvement of saline-alkali soil of new tidal marsh reclamation area |
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| US6381899B1 (en) * | 2000-03-30 | 2002-05-07 | Vastar Resources, Inc. | Well drill cuttings disposal |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105359663A (en) * | 2015-11-30 | 2016-03-02 | 天津吉天环境科技发展有限公司 | Improvement method for soil of saline and alkaline land |
| CN105359663B (en) * | 2015-11-30 | 2017-10-31 | 天津吉天环境科技发展有限公司 | Saline-alkali soil improvement method |
| CN105940806A (en) * | 2016-05-13 | 2016-09-21 | 福建农林大学 | Salinized soil composite restoration method effectively inhibiting salinization |
| CN105960877A (en) * | 2016-05-13 | 2016-09-28 | 福建农林大学 | Coast salinized soil improvement method improving plough layer soil nitrogen immobilization capability |
| CN106171428A (en) * | 2016-07-15 | 2016-12-07 | 山东胜伟园林科技有限公司 | A kind of method of desulfurated plaster improvement alkali-affected soil plantation Helianthi |
| CN107409522A (en) * | 2017-07-18 | 2017-12-01 | 天津港(集团)有限公司 | A kind of method that soil structure of coastal dredger fills is improved using mushroom bran base composite high-water-absorptivresin resin |
| CN108076719A (en) * | 2018-01-04 | 2018-05-29 | 中国科学院南京土壤研究所 | A kind of engineering improvement on heavy salinized ground of haftplatte and ecological planting and establishing method |
| CN108076719B (en) * | 2018-01-04 | 2020-03-24 | 中国科学院南京土壤研究所 | Engineering improvement and ecological planting method for sticky plate severe saline-alkali soil |
| CN108184358A (en) * | 2018-01-12 | 2018-06-22 | 郑晓华 | A kind of physics and the effective ways in bioconjugation improvement salt-soda soil |
| CN112205111A (en) * | 2020-07-21 | 2021-01-12 | 中国矿业大学(北京) | Method for improving soil of open pit coal mine dump by desulfurized gypsum |
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Application publication date: 20150819 |
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