Takyr solonetz improvement method

An alkaline soil and amendment technology, applied in the fields of soil preparation, climate change adaptation, agricultural machinery and implements, etc., can solve the problems of difficult and fast rinsing of salt, soil water swelling, poor physical properties, etc., to provide ion exchange conditions, improve Soil physical structure, effect of improving soil structure

Inactive Publication Date: 2017-07-18
NINGXIA UNIVERSITY
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AI Technical Summary

Problems solved by technology

[0003] The present invention aims at "mainly clay, poor structure, poor physical properties, Na 2 SO 4 In the saline-alkali land where NaCl and NaCl are the main salinity, when the method of "excavating open ditches for irrigation and drainage of salinity" is used for land improvement, there will be problems such as "the dispersion of soil particles after irrigation will cause the soil to absorb water and swell, and the pores will be silted. Rapid leaching, the soil shrinks and hardens when it is dry, and the technical disadvantages of "slow soil salt migration speed under leaching conditions". In order to solve the above technical problems, the present invention proposes an improvement method for cracked alkaline soil, specifically The implementation steps and scheme are as follows:

Method used

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Experimental program
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Effect test

Embodiment 1

[0029] The specific implementation steps are as follows:

[0030] 1. Level the land first, the height difference is not more than 5cm, apply improver and fertilizer on the surface of the land, and deeply loosen and plow the land to fully mix the improver, fertilizer and soil. The composition and dosage of the improver are desulfurization Gypsum 28t / hm 2 , furfural slag 7.5t / hm 2 , organic fertilizer 35t / hm 2 , sheep dung or cow dung 50m 3 / hm 2 , yellow sand 100m 3 / hm 2 , wherein the depth of deep turning is 20cm;

[0031] 2. Set up a drainage ditch on one side of the entire land;

[0032] 3. Open multiple underground ditches with a depth of 100cm-120cm and a width of 30cm on the land perpendicular to the drainage ditch, and fill the underground ditches with gravel with a layer thickness of 30cm, straw with a layer thickness of 40cm, and soil until it is level with the land level flat, and the distance between the culverts is 4m;

[0033] 4. Build high ridges on the ...

Embodiment 2

[0038] Adjust the pitch of the dark ditch in step 3 of the first embodiment to 6m, and keep the other implementation content consistent with the first implementation.

Embodiment 3

[0040] Adjust the pitch of the dark ditch in step 3 of the first embodiment to 8m, and keep the other implementation content consistent with the first implementation.

[0041] Table 1 shows the improvement results of saline-alkali land in three examples using different culvert spacings.

[0042] Table 2 shows the improvement results of saline-alkali land at different distances from the culvert in the three examples.

[0043] Table 1

[0044]

[0045] Table 2

[0046]

[0047]The test results show that the soil pH, alkalinity, and total salt are all reduced under the conditions of water and salt control measures combined with gravel ditch salt drainage. The soil hydrodynamic conditions near the gravel culvert are stronger, the water movement is faster, and the salt washing effect is more obvious. It can be seen from the improvement effect and engineering investment that the effect of culvert spacing 6m is the best.

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Abstract

The invention provides a takyr solonetz improvement method. A physicochemical soil improvement method, a method of salt elimination by irrigation and a crop cultivation method are integrated, an improver and fertilizer are applied to soil to condition the physicochemical properties of the soil, the soil structure is improved, ion exchange conditions are effectively provided and migration of soil salt is accelerated in cooperation with a measure of salt elimination by irrigation, soil desalination is facilitated, the physicochemical soil properties and structure can be effectively improved in cooperation with planting of saline-alkali tolerant plants, the permeability is improved, and leaching of soil salt is facilitated; the technical problems that soil absorbs water and expands and pores are choked with silt due to soil granule dispersion after irrigation, mud is not permeable, salt is difficult to rapidly leach, soil shrinks and hardens when soil dries, and the migration speed of soil salt under the leaching condition is low are solved. The method is favorable to development and utilization of saline-alkali soil resources in China and has remarkable economic, social and ecological benefits.

Description

technical field [0001] The invention belongs to the improvement field of saline-alkali soil, in particular to a kind of cracked alkaline soil, and the main salt of the land is Na 2 SO 4 Improvement method of alkaline soil with NaCl. Background technique [0002] The improvement of cracked alkaline soil is a complex and long-term systematic project, which is difficult to control and seriously affects the sustainable development of local agriculture. The cracked alkaline soil in Yinbei area of ​​Ningxia has a large capacity, mainly clay, poor structure and poor physical properties. After irrigation, the dispersion of soil particles leads to silting of soil pores, poor water permeability, and it is difficult to quickly wash out the salt content. 2 SO 4 It is mainly composed of NaCl, and its notable feature is that the soil is compact, shrinks and hardens when dry, absorbs water and swells when wet, and is muddy and difficult to permeate. However, the terrain of this area is...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02
CPCA01B79/02Y02A40/10
Inventor 王旭孙兆军王正焦炳忠
Owner NINGXIA UNIVERSITY
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