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Method for improving saline and alkaline land through ardealite, dimethylolurea and EDTA

A bishydroxymethyl urea and phosphogypsum technology, applied in the field of saline-alkali land treatment, can solve the problems of inability to be popularized in a large area, complex production process, and difficult treatment, so as to increase water permeability, reduce soil bulk density, and promote salt washing speed effect

Inactive Publication Date: 2015-12-16
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, difficult treatment and other conditions, it cannot be popularized in a large area

Method used

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  • Method for improving saline and alkaline land through ardealite, dimethylolurea and EDTA
  • Method for improving saline and alkaline land through ardealite, dimethylolurea and EDTA
  • Method for improving saline and alkaline land through ardealite, dimethylolurea and EDTA

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for improving saline-alkali land with phosphogypsum+1'3-bishydroxymethylurea+EDTA provided in this embodiment is as follows:

[0033] 1. Raw material preparation

[0034] Phosphogypsum;

[0035] humic acid;

[0036] 1'3-bismethylolurea;

[0037] The curing agent can be selected as at least one of zinc sulfate, trimethyl phosphate, diethyl oxalate, oxalic acid, phthalic acid, benzoic acid, and monochloroacetic acid. In this embodiment, zinc sulfate is selected;

[0038] EDTA;

[0039] The above-mentioned raw materials are stored separately until use.

[0040] 2. The method of improving saline-alkali land with phosphogypsum + 1'3-bishydroxymethylurea + EDTA

[0041] Specific steps are as follows:

[0042] (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 1 day;

[0043] (2) Then spread the mixture of 1'3-bismethylolurea an...

Embodiment 2

[0049] A method for improving saline-alkali land with phosphogypsum+1'3-bishydroxymethylurea+EDTA provided in this embodiment is as follows:

[0050] 1. Raw material preparation

[0051] Phosphogypsum;

[0052] humic acid;

[0053] 1'3-bismethylolurea;

[0054] The curing agent can be selected as at least one of zinc sulfate, trimethyl phosphate, diethyl oxalate, oxalic acid, phthalic acid, benzoic acid, and monochloroacetic acid, and trimethyl phosphate is selected in this embodiment;

[0055] EDTA;

[0056] The above-mentioned raw materials are stored separately until use.

[0057] 2. The method of improving saline-alkali land with phosphogypsum + 1'3-bishydroxymethylurea + EDTA

[0058] Specific steps are as follows:

[0059] (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;

[0060] (2) Then spread the mixture of 1'3-bismet...

Embodiment 3

[0066] A method for improving saline-alkali land with phosphogypsum+1'3-bishydroxymethylurea+EDTA provided in this embodiment is as follows:

[0067] 1. Raw material preparation

[0068] Phosphogypsum;

[0069] humic acid;

[0070] 1'3-bismethylolurea;

[0071] The curing agent can be selected as at least one of zinc sulfate, trimethyl phosphate, diethyl oxalate, oxalic acid, phthalic acid, benzoic acid, and monochloroacetic acid, and benzoic acid is selected in this embodiment;

[0072] EDTA;

[0073] The above-mentioned raw materials are stored separately until use.

[0074] 2. The method of improving saline-alkali land with phosphogypsum + 1'3-bishydroxymethylurea + EDTA

[0075] Specific steps are as follows:

[0076] (1) Sprinkle phosphogypsum and humic 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 10 days;

[0077] (2) Then spread the mixture of 1'3-bismethylolur...

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Abstract

The invention provides a method for improving saline and alkaline land through ardealite, dimethylolurea and EDTA. The method includes the steps of ardealite and humic acid treatment, dimethylolurea treatment and EDTA treatment. By the adoption of the method for improving the saline and alkaline land, saline and alkaline soil can be rapidly improved to be suitable for crop growth; besides, an improver is wide in application range and suitable for soil improvement on soil salinization and alkalinization caused by different reasons in different areas and can improve the soil structure, lower soil alkalinity, increase the soil salt rejection ratio, improve soil fertility, promote crop growth and improve agricultural economy when reasonably applied into 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 by using phosphogypsum+1'3-bismethylolurea+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 are...

Claims

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Application Information

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IPC IPC(8): A01B79/02C09K17/40C09K101/00C09K109/00
Inventor 王国维张志梅孙志梅廖吉星魏发展
Owner GUIZHOU KAILIN GRP CO LTD
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