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Method for improving saline-alkali soil by using phosphogypsum, slow release binder and EDTA (ethylene diamine tetraacetic acid)

A slow-release binder and saline-alkali land technology, which is applied in the field of saline-alkali land treatment, can solve problems such as inability to be popularized in a large area, poor treatment effect, and complicated production process, and achieve the effects of increasing water permeability, reducing bulk density, and low solubility

Inactive Publication Date: 2015-12-02
GUIZHOU KAILIN GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are many soil amendments for chemical treatment of soil salinization, such as gypsum, calcium sulfate, superphosphate, industrial waste phosphogypsum, industrial waste acid, organic fertilizer, humic acid, fly ash, peat, fermented vinegar These have achieved certain effects on improving saline-alkali land. More commonly used are organic fertilizers and gypsum, of which gypsum is made of Ca 2+ Substitution of Na + And use acid to neutralize alkali to improve saline-alkali land; but limited by complex production process, poor treatment effect and other conditions, it cannot be popularized in a large area

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] 1. Raw material preparation

[0032] Phosphogypsum,

[0033] humic acid,

[0034] Slow-release binder, including 20 parts of macromolecular substances, 1 part of zinc sulfate, and 1 part of polyethylene glycol, wherein: the structural formula of macromolecular substances is: H-[OCH 2 NHCONHCH 2 ] n-OH, wherein 2≤n≤5, n=2 in this embodiment; and all the above-mentioned raw materials are stored separately and mixed when used;

[0035] EDTA,

[0036] 2. A method for improving saline-alkali land with phosphogypsum, slow-release binder, and EDTA, comprising the following steps:

[0037] (1) Sprinkle phosphogypsum and humic acid evenly on the surface of the saline-alkali land, and plow 20cm deep, so that the phosphogypsum and the soil layer are evenly mixed and kept for 5 days;

[0038] (2) Then the slow-release binder is evenly sprinkled on the surface of the saline-alkali soil, and deeply plowed for 20cm, so that the slow-release binder and the soil layer are evenly mi...

Embodiment 2

[0045] 1. Raw material preparation

[0046] Phosphogypsum,

[0047] humic acid,

[0048] Sustained-release binder, including 40 parts of macromolecular substance, 4 parts of zinc sulfate, 4 parts of polyethylene glycol, wherein: macromolecular substance structural formula is: H-[OCH 2 NHCONHCH 2] n-OH, wherein 2≤n≤5, n=5 is selected in this embodiment; and all the above-mentioned raw materials are stored separately and mixed when used;

[0049] EDTA,

[0050] 2. A method for improving saline-alkali land with phosphogypsum, slow-release binder, and EDTA, comprising the following steps:

[0051] (1) Sprinkle phosphogypsum and humic acid evenly on the surface of the saline-alkali land, and plow 20cm deep, so that the phosphogypsum and the soil layer are evenly mixed and kept for 30 days;

[0052] (2) Then the slow-release binder is evenly sprinkled on the surface of the saline-alkali soil, and deeply plowed for 20cm, so that the slow-release binder and the soil layer are eve...

Embodiment 3

[0059] 1. Raw material preparation

[0060] Phosphogypsum,

[0061] humic acid,

[0062] Slow-release binder, including 30 parts of macromolecular substances, 2 parts of zinc sulfate, and 3 parts of polyethylene glycol, wherein: the structural formula of macromolecular substances is: H-[OCH 2 NHCONHCH 2 ] n-OH, wherein 2≤n≤5, n=3 is selected in this embodiment, and all the above-mentioned raw materials are stored separately and mixed when used;

[0063] EDTA,

[0064] 2. A method for improving saline-alkali land with phosphogypsum, slow-release binder, and EDTA, comprising the following steps:

[0065] (1) Sprinkle phosphogypsum and humic acid evenly on the surface of the saline-alkali land, and plow 20cm deep, so that the phosphogypsum and the soil layer are evenly mixed and kept for 20 days;

[0066] (2) Then the slow-release binder is evenly sprinkled on the surface of the saline-alkali soil, and deeply plowed 20cm, so that the slow-release binder and the soil layer ar...

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PUM

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Abstract

The invention provides a method for improving saline-alkali soil by using phosphogypsum, a slow release binder and EDTA (ethylene diamine tetraacetic acid). The method comprises the steps of firstly treating the saline-alkali soil with phosphogypsum and humic acid, then treating the saline-alkali soil with the slow release binder and finally treating the saline-alkali soil with EDTA. The saline-alkali soil can be quickly improved by adopting the saline-alkali soil improvement method and is suitable for crop growth. The improvers have a wider range of application, are suitable for improving the soil salinized and alkalized due to different reasons in different regions and can achieve the effects of improving the soil structure, reducing the soil alkalinity, increasing the salt elimination rate of the soil, improving the soil fertility, promoting growth of crops and increasing the agricultural economy by being reasonably applied to the soil.

Description

technical field [0001] The invention relates to the technical field of saline-alkali land treatment, in particular to a method for improving saline-alkali land with phosphogypsum, a slow-release binder and EDTA. Background technique [0002] Saline-alkali land is a general term for saline soil, alkaline soil and various salinized and alkalized soils. Saline soil refers to the soil in which the soluble salt content in the soil reaches a certain level, which can cause obvious harm to the growth and development of plants. Alkaline soil refers to the soil that contains a large amount of exchangeable ions in the soil, and the amount reaches the level that can harm the growth and development of plants and change the soil properties. In actual conditions, saline soil and alkaline soil often coexist in a mixed form, collectively referred to as saline-alkali soil. [0003] Saline-alkali land is an important land resource, and it is a soil type widely distributed on the earth. The ...

Claims

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Application Information

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IPC IPC(8): C09K17/40B09C1/08C09K101/00C09K109/00
Inventor 杜绍伦陈彬蒋俊蕊赵先明魏发展廖吉星
Owner GUIZHOU KAILIN GRP CO LTD
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