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Method for improving saline-alkali soil through ardealite, N'N-(methylenedi-4,1-phenylene)bis[N'-phenyl-Urea] and EDTA

A technology of methylene diurea and saline-alkali land, applied in the field of saline-alkali land treatment, can solve the problems that the treatment process cannot be popularized in a large area and the production process is complicated, and achieve the effects of increasing water permeability, reducing soil bulk density, and accelerating salt washing speed

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, complex treatment process 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

[0032] 1. Raw material preparation

[0033] Phosphogypsum,

[0034] fulvic acid,

[0035] Methylene diurea, its structural formula is:

[0036] Diethyl oxalate,

[0037] Hydroxymethyl Cellulose,

[0038] EDTA,

[0039] 2. A method for improving saline-alkali land with phosphogypsum+methylene diurea+EDTA, comprising the following steps:

[0040] (1) Sprinkle phosphogypsum and ammonium fulvic acid evenly on the surface of the saline-alkali soil, and plow 20cm deep, so that the phosphogypsum and the soil layer are evenly mixed and kept for 5-30 days;

[0041] (2) Mix methylenediurea, diethyl oxalate, and hydroxymethyl cellulose in a ratio of 50:1:1, and then evenly sprinkle it on the surface of the saline-alkali land, and plow 20cm deep to make the mixture even, and spray clean water, so that The 20cm deep saline-alkali soil can be moistened and kept for 5 days;

[0042] (3) Sprinkle EDTA evenly on the surface of the saline-alkali land, and plow 20cm deep, so that the ma...

Embodiment 2

[0048] 1. Raw material preparation

[0049] Phosphogypsum,

[0050] fulvic acid,

[0051] Methylene diurea, its structural formula is:

[0052] Diethyl oxalate,

[0053] Hydroxymethyl Cellulose,

[0054] EDTA,

[0055] 2. A method for improving saline-alkali land with phosphogypsum+methylene diurea+EDTA, comprising the following steps:

[0056] (1) Sprinkle phosphogypsum and ammonium fulvic 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;

[0057] (2) Mix methylene diurea, diethyl oxalate, and hydroxymethyl cellulose in a ratio of 50:5:5, and then evenly sprinkle it on the surface of the saline-alkali land, and plow 20cm deep to make the mixture even, and spray clean water so that The 20cm deep saline-alkali soil can be moistened and kept for 20 days;

[0058] (3) Sprinkle EDTA evenly on the surface of the saline-alkali land, and plow 20cm deep, so that the mater...

Embodiment 3

[0064] 1. Raw material preparation

[0065] Phosphogypsum,

[0066] fulvic acid,

[0067] Methylene diurea, its structural formula is:

[0068] Diethyl oxalate,

[0069] Hydroxymethyl Cellulose,

[0070] EDTA,

[0071] 2. A method for improving saline-alkali land with phosphogypsum+methylene diurea+EDTA, comprising the following steps:

[0072] (1) Sprinkle phosphogypsum and ammonium fulvic acid evenly on the surface of the saline-alkali soil, and plow 20cm deep, so that the phosphogypsum and the soil layer are evenly mixed and kept for 5-30 days;

[0073] (2) Mix methylenediurea, diethyl oxalate, and hydroxymethyl cellulose in a ratio of 50:3:2, and then evenly sprinkle it on the surface of the saline-alkali land, and plow 20cm deep to make the mixture even, and spray clean water to make The 20cm deep saline-alkali soil can be moistened and kept for 13 days;

[0074] (3) Sprinkle EDTA evenly on the surface of the saline-alkali land, and plow 20cm deep, so that the ma...

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Abstract

The invention provides a method for improving saline-alkali soil through ardealite, N'N-(methylenedi-4,1-phenylene)bis[N'-phenyl-Urea] and EDTA. The method includes the steps of firstly, processing the saline-alkali soil through ardealite and fulvic acid; secondly, processing the saline-alkali soil through N'N-(methylenedi-4,1-phenylene)bis[N'-phenyl-Urea], diethyl oxalate and hydroxymethyl cellulose; thirdly, processing the saline-alkali soil through EDTA. By means of the method, the saline-alkali soil can be rapidly improved to be suitable for growth of crops, the application range of a modifying agent is wide, and the modifying agent is suitable for improving saline-alkali soil generated due to different reasons in different regions; after the modifying agent is reasonably applied into the soil, the structure of the soil can be improved, the soil alkalinity can be lowered, the salt elimination rate of the soil can be improved, the fertility of the soil can be increased, growth of crops can be promoted, and agricultural economy can be improved.

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 by using phosphogypsum+methylene diurea+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 area o...

Claims

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Application Information

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IPC IPC(8): A01B79/00C09K17/40C09K101/00C09K109/00
Inventor 陈彬廖吉星朱飞武孙志梅张伟彭宝林
Owner GUIZHOU KAILIN GRP CO LTD
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