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Method for leaching saline-alkali soil

A soil leaching and salinization technology, applied in the field of saline-alkali soil leaching, can solve the problems of long alkali improvement period, poor effect of alkali improvement, and inconspicuous effect, and achieve low cost, long fertilizer effect time, and improved ecology conditional effect

Inactive Publication Date: 2017-02-15
SHANDONG SUNWAY LANDSCAPE TECH
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AI Technical Summary

Problems solved by technology

Through long-term observation by the inventors, it is found that methods 1 and 3 have the disadvantages of poor effect of alkali modification, method 2 has the disadvantages of large investment and serious loss of fertility, and method 4 has the disadvantages of large investment and ineffective effect
Above-mentioned three kinds of methods all highlight the problem that there is a long period of alkali modification

Method used

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Examples

Experimental program
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Effect test

Embodiment 1

[0021] 1) Leveling the land, excavating deep ditches with a depth of 26-60 cm at an interval of 0.4-8 meters. Fill a layer of sand with a thickness of 3-37 cm to form an underground alkali drainage ditch; dig an alkali drainage ditch connected with the underground alkali isolation layer, and divert water for irrigation and alkali drainage. The alkali isolation layer is located below the sand, and the alkali drainage pipelines are distributed separately an alkali layer and a sand tank for accommodating the alkali discharge pipeline,

[0022] 2) The soil is mixed with the improver, and the components of the improver are humic acid 40%, zeolite 30%, acid conditioner 20%, fly ash 5%, furfural slag 5% by weight; the components of the organic fertilizer are by weight The ratio is 45% of fermented chicken manure, 50% of crushed straw, and 5% of wood vinegar; the weight ratio of the modifier to the organic fertilizer is 1:1; the acid conditioner is sulfuric acid, hydrochloric acid, ni...

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Abstract

A method for leaching saline-alkali soil comprises following steps: 1) land leveling, deep ditches which are 26 to 60 cm deep are dug with intervals of 0.4 to 8 meters; the deep ditches are one-way parallel ditches, or parallel ditches which are crossed in length and breadth with different density vertically and horizontally, a layer of sand which is 3 to 37 cm thick is laid at the bottom of the deep ditches to form underground alkali discharge sand ditches; 2) underground salt discharge pipes laying; 3) underground irrigation pipes laying; 4) deep scarification and knot breaking; 5) fresh water flooding irrigation; 6) salt water enhanced drainage: while fresh water flooding irrigation is being carried out, one ends of the underground salt discharge pipes are sealed with sealing plugs and the other ends are connected with water pumps to perform enhanced drainage on salt water leached to the underground salt discharge pipes; the leached salt water is drained to salt discharge ditches; 7) continuous irrigation and drainage: the fresh water flooding irrigation and the salt water enhanced drainage are repeated carrying out to quickly leach the salinity in the soil; when the salinity in the soil decreases to an expected target, irrigation and drainage are stopped.

Description

technical field [0001] The invention relates to an alkali discharge system, in particular to a method for washing salinized soil. Background technique [0002] Saline-alkali land is a huge potential resource, and the development and utilization of saline-alkali land is one of the important measures to expand the area of ​​cultivated land and further develop agricultural production. There are about 1.5 billion mu of various saline soils in my country, accounting for 26.3% of the world's saline soil area. The area of ​​saline-alkali land in coastal and inland areas is relatively large, and most of the saline-alkali land has been waiting for development. In particular, heavy saline-alkali coastal areas have high groundwater levels, high soil salinity, soil compaction, low soil fertility, and poor air permeability, making it difficult to produce various economic crops. How to quickly desalinate saline-alkali land is the technical bottleneck of saline-alkali land improvement. I...

Claims

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Application Information

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IPC IPC(8): A01B79/02
CPCA01B79/02
Inventor 王胜
Owner SHANDONG SUNWAY LANDSCAPE TECH
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