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Dry salt discharge method applicable to saline-alkali land in arid area

A saline-alkali land and saline-alkali technology, applied in the field of dry salt discharge in saline-alkali land, can solve problems such as being difficult to be widely used, and achieve the effect of reducing soil surface evaporation and weeds, reducing surface runoff, and good salt discharge effect.

Inactive Publication Date: 2018-03-23
CHINA AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] To sum up, the existing salt drainage technology is difficult to be widely used in arid areas due to its own defects.

Method used

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  • Dry salt discharge method applicable to saline-alkali land in arid area
  • Dry salt discharge method applicable to saline-alkali land in arid area

Examples

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Embodiment 1

[0029] In this example, cotton is planted on the heavily saline-alkali farmland in the Manas River Basin in Xinjiang, and dry drainage of salt is implemented.

[0030] The specific method is: during the cotton sowing period, lay the drip irrigation belt and the plastic film according to the requirements of the drip irrigation mode under the plastic film and sow the seeds, and then lay the hydrophilic non-woven fabric with a thickness of less than 0.2mm and a pore size of less than 0.1mm between two adjacent plastic films. Above the bare saline-alkali ground surface, and the edge of the non-woven fabric is superimposed on the mulch film, the overlapping part is 10cm wide, and the non-woven fabric is fixed with covering soil at a distance of 5m; when it is sunny for more than 5 consecutive days after picking cotton, put The non-woven fabric is recovered, washed, and dried for reuse.

[0031] Results of the embodiment: the salt content in the soil within 1m of the surface layer b...

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Abstract

The invention relates to a dry salt discharge method applicable to a saline-alkali land in an arid area. With the method provided by the invention, a mode of drip irrigation under a film is adopted; crops are planted on the saline-alkali land in the arid area; and a layer of a porous hydrophilic material is laid on the surface of the film-uncovered saline-alkali land exposed among films. The method provided by the invention does not need additional washing of salt by irrigation and can discharge the salt accumulated on land surface among the films on the basis of no loss and no damage to surface soil, wherein the key of the method is to lay a layer of the porous hydrophilic material on the ground surface among the films. According to the invention, under the driving of atmospheric evaporation force, a water flow carried with the salt migrates to the surface soil among the films from a root area, and continuously migrates upward into the porous hydrophilic material; and when water is evaporated into the atmosphere, the salt remains in the porous hydrophilic material, and the porous hydrophilic material adsorbed with the salt is finally removed, so the purpose of discharging the saltcan be reached. The method provided by the invention has the obvious advantages of conservation of water, high efficiency, convenience and rapidness, low cost, great large-scale popularization value,etc.

Description

technical field [0001] The invention relates to a dry salt discharge technology for saline-alkali land, in particular to an inter-film dry salt discharge technology that can be implemented in saline-alkali farmland under film drip irrigation in arid areas. Background technique [0002] In arid areas, water resources are very scarce but evaporation is strong, which can easily lead to secondary salinization of soil, and the rapid development of water-saving irrigation will further aggravate secondary salinization of soil. In recent years, drip irrigation under mulch has been favored due to its advantages of reducing soil surface evaporation, preventing deep seepage, maintaining soil structure, inhibiting weed growth, increasing temperature and increasing production, and has been widely used in arid areas in northern my country (especially for cotton , corn and other thinning crops). Under the condition of drip irrigation under the film, although the soil in the root zone of th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02
CPCA01B79/02
Inventor 石建初左强李保国戴秋明
Owner CHINA AGRI UNIV
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