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A long-term improvement method for original soil of salt spots in arid area farmland

A technology for arid areas and salt spots, which is applied in the field of long-term improvement of original soil in arid areas of farmland salt spots, can solve the problems of lack of optimization and integration measures, and achieve the effects of easy operation for farmers, blocking capillary action, and not easy to return to salt

Active Publication Date: 2016-08-24
XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

There is a lack of an integrated method of optimization and integration under water-saving conditions, which is simple, easy to implement, low in cost, and long-term

Method used

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  • A long-term improvement method for original soil of salt spots in arid area farmland

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The implementation period is October 25, 2009. The implementation plot is the salt spot at the intersection of Lantian 4th Road and Baiyun 3rd Road in Karamay Agricultural Development Zone. %, the specific operation is as follows:

[0023] a. Landfill gravel layer:

[0024] Choose autumn construction, use an excavator to dig out the salt patch 60cm deep soil, fill 3 layers of gravel with a thickness of 20cm. flat;

[0025] b. Ditching and filling filter material:

[0026] On the salt patch land after step a is flattened, use ditching machine every 5 meters to ditch along the sowing direction, ditch depth 40cm, wide 40cm, in the ditch, fill successively from bottom to top with deep gravel 3 of 10cm and deep crushed straw 2 of 30cm, The length of the crushed straw 2 is 6cm, and the 3 layers of buried gravel are connected with the 3 layers of gravel in step a. The same method is adopted for land preparation, and the salt spot area is marked, and then the planting method...

Embodiment 2

[0030] The implementation period is November 10, 2010. The land for implementation is the newly reclaimed wasteland in Xiaoguai Township, Karamay. The salt spot is roughly within 50m×40m, and the total salt content of the 0-30cm soil layer is 1.26%. The specific operation is carried out according to the following steps:

[0031] a. Filling gravel layer

[0032] Choose autumn construction, use an excavator to dig out the 60cm deep soil in the salt patch, fill 3 layers of gravel with a thickness of 20cm. soil, leveling;

[0033] b. Ditching and filling filter material

[0034] On the salt patch land after step a is flattened, use ditching machine every 10 meters along sowing to ditch, ditch deep 40cm, wide 40cm, in the ditch fill successively from bottom to top the deep gravel 3 of 10cm and the deep pulverized straw 2 of 30cm, The 3rd layer of gravel is connected with the 3rd layer of gravel in step a, the length of crushed straw 2 is 10cm, mark the flat land and salt spot are...

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Abstract

The invention relates to a long-acting improvement method for improving original slat stain soil of a farmland in a draughty region. The method comprises the following steps: under a condition of drip irrigation under a plastic film, integrating measures of engineering water permeation and soil enriching by a bio-fertilizer; digging topsoil salt stain by mechanical measures, filling gravels, covering the soil by water-permeating geotechnical cloth, back-filling original soil and flattening; ditching along a seeding direction, sequentially filling the gravels and crushed straws from bottom to top, flattening the land and marking salt stain areas; drip-irrigating under the plastic film and planting sweet clovers. The gravel layers are filled and buried to provide conditions for stopping salt contents from moving upwards and washing salt of the original soil for a long time; the ditching in the seeding direction and the filling of a filter material can break a clay layer, prevent the salt content from moving upwards along capillaries and also form a downwards-moving passage for salt washing water, so that the salt washing water is concentrated in the gravel layer and sprayed downwards for washing; due to the drip irrigation under the plastic film and the planting of salt resisting green manure-sweet clovers, water is saved, salt is washed, coverage is enhanced, and improvement effects of engineering measures can be fastened and strengthened. The soil can be suitable for growth of crops in two years, and accumulation of salt in the surface soil is hard to cause.

Description

technical field [0001] The invention relates to a method for long-term improvement of original soil of farmland salt spots in arid areas. Background technique [0002] Formation of salt spots: Salt spots, also known as salt caves, have three sources: ⑴ Under the condition of deep groundwater (> 4 meters), plant salt accumulation (Tamarix bag) is the main reason for the formation of salt spots. (2) The unevenness of the land is the reason for the formation of salt patches. The redistribution of salt is affected by the difference in heat in micro-topography, and "salt climbs to a higher place" is an image of the formation of salt spots. The ground elevation difference is only 4-5cm, and the salt content on the surface of the salt spot is 3-6 times higher than that of the surrounding area. (3) The clay layer in the soil profile is the reason for the formation of salt patches. The clay layer in the soil profile is a horizontally distributed alluvial layer with a dense text...

Claims

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Application Information

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IPC IPC(8): A01G1/00A01B79/02
CPCA01B79/02A01G22/00Y02A40/10
Inventor 张科涂锦娜李艳红赵振勇田长彦王培胡明芳
Owner XINJIANG INST OF ECOLOGY & GEOGRAPHY CHINESE ACAD OF SCI
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