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Coastal saline-alkali soil matrix improvement method

A saline-alkali soil and matrix technology, applied in land preparation methods, chemical instruments and methods, agricultural machinery and implements, etc., can solve the problems of soil fertilizer loss, poor ventilation and water permeability, heavy soil texture, etc., to prevent secondary salinization Effect

Pending Publication Date: 2022-05-27
JIANGSU GEOLOGICAL SURVEY INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The study area is located in the coastal plain area, and the parent material of the soil is mostly derived from the alluvial deposits of the Huanghuai River. The parent material of the soil is fine and dense, the soil texture is heavy, and the ventilation and water permeability are poor, so that the leaching of soil salt is limited, and leaching will cause the loss of soil fertilizer. , therefore, it is very necessary to invent a saline-alkali land improvement method that promotes salt leaching while retaining water and fertilizer

Method used

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  • Coastal saline-alkali soil matrix improvement method
  • Coastal saline-alkali soil matrix improvement method
  • Coastal saline-alkali soil matrix improvement method

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A method for matrix improvement of coastal saline-alkali soil, comprising the following steps:

[0030] (1) The natural air-dried plant straws are crushed to a size of 1-2cm, and then evenly spread on the surface of the saline-alkali soil. 5200-10600kg;

[0031] (2) Use the rotary tiller to plough the soil deeply, the burial depth is 40cm, and the depth of ploughing and ploughing can meet the groundwater soil space required for the root growth of garden plants, so that the soil and plant straw particles are fully mixed;

[0032] (3) excavate the soil 1 after the improvement treatment after the mixing and mixing;

[0033] (4) A plurality of trenches 6 are arranged in the subsoil layer 2 after excavation, and the interval can be 2-4m, preferably 3m, and the trench 6 maintains a slope of 0.1%-0.3%, and a row is arranged in the center of the trench 6 The salt pipe 3, the salt discharge pipe 3 is wrapped with geotextile to prevent the sediment from blocking the seepage hol...

Embodiment 2

[0038] A method for matrix improvement of coastal saline-alkali soil, comprising the following steps:

[0039] (1) The natural air-dried plant straws are crushed to a size of 1-2cm, and then evenly spread on the surface of the saline-alkali soil. 10400-21300kg;

[0040] (2) Use the rotary tiller to deeply plough the soil, and the burial depth is 80cm, and the depth of the deep ploughing and ploughing meets the groundwater soil space required for the root growth of garden plants, so that the soil and the plant straw particles are fully mixed;

[0041] (3) excavate the soil 1 after the improvement treatment after the mixing and mixing;

[0042] (4) Dig trenches at an interval of 3m in the subsoil layer 2, which can be 2-4m, maintain a slope of 0.1%-0.3%, and set a salt drain pipe 3 in the center 6 of the trench, and the salt drain pipe 3 is wrapped with geotextile to prevent Sediment plugs the seepage hole, lays a gravel layer 4 around the salt discharge pipe 3, fills up the e...

Embodiment 3

[0047] A method for matrix improvement of coastal saline-alkali soil, comprising the following steps:

[0048] (1) If figure 1 As shown, the natural air-dried plant straws are crushed to a size of 1-2cm, and then evenly spread on the surface of the saline-alkali soil. 15600-32000kg;

[0049] (2) Use the rotary tiller to deeply plough the soil, and the burial depth is 120cm, so that the soil and the plant straw particles are fully mixed;

[0050] (3) excavate the soil 1 after the improvement treatment after the mixing and mixing;

[0051](4) Dig trenches 6 at an interval of 3m in the subsoil layer, which can be 2-4m, maintain a slope of 0.1%-0.3%, and lower the salt drain pipe 3 in the center of the trench 6. The salt drain pipe 3 is wrapped with geotextile to prevent Sediment plugs the seepage hole, lays a gravel layer 4 around the salt discharge pipe 3, fills up the entire groove 6, and the end of the salt discharge pipe 3 is connected with the sump 5; The salt discharge p...

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Abstract

The invention discloses a coastal saline-alkali soil matrix improvement method which comprises the following steps: (1) crushing air-dried plant straws, and spreading the crushed plant straws on the surface of saline-alkali soil; (2) performing deep ploughing and soil turning on the soil, and mixing the soil with the plant straw particles; (3) cleaning and digging soil; (4) a groove is formed in the subsoil layer, a salt discharging pipe is arranged in the center of the groove, and the tail end of the salt discharging pipe is connected with a water collecting pool; (5) backfilling the improved soil, and leveling the ground; (6) leaching, discharging leacheate from the salt discharging pipe to a water collecting tank, and taking away part of salt; and (7) the step (6) is repeated, and the salt content of the soil is reduced to 0.3% or below. According to the method, the water permeability of the saline-alkali soil is effectively improved, the salt leaching efficiency is improved, and the salt content in the soil is reduced; the straw improves the soil fertility; salt in the soil can be drained away along with water through concealed pipe salt drainage, the underground water level is controlled to be below the critical depth, and the purposes of soil desalination and secondary salinization prevention are achieved.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali land improvement, and in particular relates to a method for improving a coastal saline-alkali land matrix. Background technique [0002] The coastal area of ​​Jiangsu is an important economic growth area in eastern my country. However, the degree of soil salinization in the area is serious, especially in the Lianyungang area. , the soil permeability coefficient is low, the soil is not easy to reduce salt, and the high salinity soil brings great difficulties to the ecological environment and social and economic construction. Therefore, it is of great practical significance to take targeted prevention and improvement measures. [0003] Salt comes and goes with water, which is the basic principle of saline-alkali land treatment. The leaching and desalination play a crucial role in the improvement of saline-alkali soil. condition. The study area is located in the coastal plain area, and the par...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02A01B79/00C09K17/32C09K101/00
CPCA01B79/02A01B79/00C09K17/32C09K2101/00Y02A40/10
Inventor 苟富刚龚绪龙张岩王永琦吕航王高祥
Owner JIANGSU GEOLOGICAL SURVEY INST
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