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Saline land improvement method appropriate for arid and semi-arid region

A semi-arid, saline-alkali land technology, applied in the direction of soil preparation methods, applications, and soil lifting machinery, can solve the problems of waste of topsoil resources, unsustainable effects, temporary solutions, etc., and achieve high resource utilization, long-lasting effects, and improved The effect of soil texture

Active Publication Date: 2014-05-28
SHENZHEN WANXINDA ECOLOGICAL ENVIRONMENT CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods have certain defects, such as treating the symptoms but not the root cause, slow effect, not lasting effect, high cost, waste of topsoil resources, etc., especially not suitable for saline-alkali land improvement in arid and semi-arid areas with a particularly wide area

Method used

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  • Saline land improvement method appropriate for arid and semi-arid region
  • Saline land improvement method appropriate for arid and semi-arid region

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Experimental program
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Effect test

Embodiment 1

[0055] The saline-alkali land improvement method of the present invention is firstly tested on a landscaping land in the arid and semi-arid area of ​​Northwest China. The test site area is 5000m 2 , the phenomenon of salt accumulation and return to salt appears on the surface, which belongs to heavily salinized soil.

[0056] The following technical steps are adopted for improvement:

[0057] (1) According to the land use, strip the soil of 30-50 cm from the top layer and place it separately, and then roll the bottom layer (1) until it does not subside. 30cm; the place where the soil layer is deep and fertile, the stripped topsoil (5) is deeper, but not thicker than 50cm.

[0058] (2) Arrange drainage ditches for the treatment site on the ground floor (1) after rolling, and the bottom of the drainage ditch is 20cm lower than the plane of the ground floor (1).

[0059] (3) Pave and fill the clay layer (2), with a thickness of 15cm, remove hard objects therein, compact and fl...

Embodiment 2

[0071] The saline-alkali land improvement method of the present invention is firstly tested in a saline-alkali farmland in the arid and semi-arid area of ​​Northwest China. The area of ​​farmland for testing is 1500m 2 , the site is flat, the soil layer is deep, the soil condition is relatively uniform, and the surface layer occasionally has the phenomenon of salt accumulation and return to salt, which belongs to severely salinized farmland soil.

[0072] The following technical steps are adopted for improvement:

[0073] (1) According to the land use, peel off the top 20cm of soil and place it separately, and then roll the bottom layer (1) until it does not settle.

[0074] (2) Arrange drainage ditches for the treatment site on the ground floor (1) after rolling, and the bottom of the drainage ditch is 25cm lower than the plane of the ground floor.

[0075] (3) Pave and fill the clay layer (2), with a thickness of 12cm, remove hard objects therein, compact and flatten it, a...

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Abstract

The invention provides a saline land improvement method appropriate for an arid and semi-arid region. The technical steps of surface soil stripping, bottom layer rolling compaction, claypan pavement and filling, high density polyethylene (HDPE) film coverage, organic mixed material pavement and filling, salt elimination blind pipe distribution, surface soil refilling, plant planting and the like are adopted for improvement; the method has the advantages that salt and alkali ion isolation, guide and discharge effects are good, organic matters are fully utilized for improving the soil quality and reducing salt and alkali ions, the resource utilization degree of wastes is high, the principal and secondary problems are both treated, the flow is simple, the cost is low, the in-situ remediation is realized, the surface soil resources are saved and the like; the method has wide application precepts and promotional value in the fields of environment protection, ecological remediation, park and garden construction and agricultural production, and excellent economic benefits, social benefits and ecological benefits can be created.

Description

technical field [0001] The invention relates to a method for improving saline-alkali land, in particular to an improvement method for saline-alkali land in arid and semi-arid regions. Background technique [0002] Saline-alkali land refers to the land where the salt content in the soil is too high due to the accumulation of salt, which affects the normal growth of plants. According to incomplete statistics from UNESCO and FAO, the area of ​​saline-alkali land in the world is 954.38 million hectares, of which 99.13 million hectares are in my country. Due to the accumulation of a large amount of salt in the soil in saline-alkali land, a series of deterioration of soil physical properties are caused: sticky structure, poor aeration, reduced biological flora, high bulk density, slow rise in soil temperature, poor activity of aerobic microorganisms in the soil, and slow nutrient release. The low permeability coefficient and strong capillary action will lead to the aggravation of...

Claims

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Application Information

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IPC IPC(8): A01B77/00A01B79/00
Inventor 朱兆华曹华英董沁徐国钢孙吉雄陈晓蓉刘杰向海涛周庆
Owner SHENZHEN WANXINDA ECOLOGICAL ENVIRONMENT CO LTD
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