Method for improving saline-alkali land by partitioning salt with interlayer

A saline-alkali land and salt isolation technology, which is applied in the direction of soil preparation methods, applications, agricultural machinery and implements, etc., can solve the problems of small applicable space, etc., and achieve the effects of reducing salt return, good economic benefits, and moderate investment

Inactive Publication Date: 2010-11-17
VEGETABELE INST AGRI SCI ACAD SHANXI PROV
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Problems solved by technology

This method is mainly suitable for afforestation, and its appl...

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  • Method for improving saline-alkali land by partitioning salt with interlayer

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Embodiment 1

[0029] A certain saline-alkali land is 200 mu, and the mass ratio of salt content is 0.92%. According to the classification standard of saline-alkali soil, it is severe saline-alkali soil. The way to improve it is: use an excavator to dig out and remove the 350-400mm thick soil layer from the surface to the surface, then level the ground, and lay sand about 60-70mm thick and 1-3mm in particle size After leveling, backfill 350-400mm of non-saline-alkali soil and mix 1,000kg of humic acid soil. Before sowing, add 3,000kg / mu of manure and use 50kg / mu of ferrous sulfate soil improver. Plant corn in that year, and the yield per mu is 600kg. .

Embodiment 2

[0031] The salt content of a certain saline-alkali land is 0.41%, which is moderate saline-alkali soil according to the classification standard of saline-alkali soil. The way to improve it is: use an excavator to dig out and remove the 150-200mm soil layer from the surface to the surface, then level the ground, lay 20-30mm thick, 5-10mm diameter gravel, and backfill after leveling 300-350mm of non-saline-alkali soil, enough organic fertilizer should be applied before sowing, and 45kg / mu ferrous sulfate soil amendment should be used, and agricultural production can be carried out in that year.

Embodiment 3

[0033] A saline-alkali land has a salinity mass ratio of 0.19%, which is classified as light saline-alkali soil according to the classification standard of saline-alkali soil. The way to improve it is: use an excavator to dig out and remove the 50-80mm soil layer from the surface to the surface, then level the ground, first lay gravel with a thickness of 10-20mm and a diameter of 3-10mm, and then Lay 10-20mm thick sand on the gravel, and then backfill 300-350mm of non-saline-alkali soil, apply enough organic fertilizer before sowing, and use 30kg / mu ferrous sulfate soil improver, and agricultural production can be carried out in that year.

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Abstract

The invention discloses a method for improving saline-alkali land by partitioning salt with an interlayer, comprising the following steps of: (1) removing soil of the surface layer of the saline-alkali land by 50-400mm according to different salt content concentration of the soil of the saline-alkali land; (2) paving a layer of salt partition interlayer materials on the soil-removed surface; (3) backfilling non-saline-alkali soil which is 300-400mm thick to the salt partition interlayer materials; and (4) increasing the application quantity of organic fertilizers on the backfilled new soil and using an improver. The invention has the characteristics of high improvement speed, good improvement effect, moderate investment and good economic benefit. The method can reduce or block salt return caused by capillary water rise, and the salt partition interlayer can not be broken by the cultivation management of plants. The agricultural production can be carried out in the current year, and the production economic benefit is generated in the current year when the saline-alkali land is improved in the current year, and people benefit from the saline-alkali land for many years after the saline-alkali land is invested at a time. The invention is especially suitable for saline-alkali areas with less rainfall and poorer irrigation conditions and is particularly suitable for constructing vegetable tents on the saline-alkali land or assisting in constructing the vegetable tents.

Description

technical field [0001] The invention relates to the technical field of saline-alkali land improvement, in particular to a method for improving saline-alkali land with interlayer salt separation. Background technique [0002] Our country has a vast territory, and there are large areas of saline-alkali land, especially in the northern part of our country. Relevant experts at home and abroad have done a lot of research on the soil improvement methods of saline-alkali land, and the research measures involve engineering, biology, chemistry and physics. In terms of methods applied to production, there are three main methods for improving saline-alkali land: salt discharge method, salt pressing method and salt blocking method. The salt discharge method is to flush the saline-alkali land with a large amount of water for a long time, so as to reduce the salt content of the surface layer of the saline-alkali land; The salt in the soil is brought to the bottom layer with the water, s...

Claims

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Application Information

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IPC IPC(8): A01B79/02
Inventor 巫东堂兰创业赵军良王秀英李改珍
Owner VEGETABELE INST AGRI SCI ACAD SHANXI PROV
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