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Method for modifying soda alkalized soil into paddy field by inorganic macromolecular soil modifier

A technology of soil improver and inorganic polymer, which is applied in the field of rapid improvement of soda alkalized soil into paddy field by inorganic polymer soil improver, which can solve the problems of slow improvement effect and so on

Inactive Publication Date: 2013-04-10
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a method that can quickly and effectively improve severe soda alkalized soil according to the problems such as slow improvement effect in the existing alkalized soil improvement technology. method for paddy field

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] The improved and repaired soil is the Da'an project area of ​​the "National Major Project of Land Development and Consolidation in Western Jilin" in Da'an City, Jilin Province. The surface soil is alkaline patchy land, with an alkalization degree (ESP) of 59.2% and a pH value of 10.62, which belongs to heavily alkalized soil. The purpose of improvement and restoration is to reduce the salinity content of the surface soil and make the soil suitable for rice growth. When preparing the soil, apply 18 tons of inorganic polymer modifier per hectare, and then soak the field, harrow and stir to dissolve the inorganic polymer modifier and mix it with the soil. The water consumption for soaking and washing is 500 cubic meters per hectare, and rice is transplanted after 2 to 3 days. According to local normal rice field management. After autumn harvest, the soil alkalinity was 23.6%, the pH value was 8.56, and the yield was 6051 kg / ha.

Embodiment 2

[0022] The improved and repaired soil is the Da'an project area of ​​the "National Major Project of Land Development and Consolidation in Western Jilin" in Da'an City, Jilin Province. The surface soil is alkaline patchy land, with an alkalization degree (ESP) of 49.6% and a pH value of 10.21, which belongs to heavily alkalized soil. The purpose of improvement and restoration is to reduce the salinity content of the surface soil and make the soil suitable for rice growth. When preparing the soil, apply 15 tons of inorganic polymer modifier per hectare, then soak the field, harrow and stir to dissolve the inorganic polymer modifier and mix it with the soil. The water consumption for soaking and washing is 450 cubic meters per hectare, and rice is transplanted after 2 to 3 days. According to local normal rice field management. After autumn harvest, the soil alkalinity was 18.7%, the pH value was 8.32, and the yield was 7423 kg / ha.

Embodiment 3

[0024] The improved and repaired soil is the Da'an project area of ​​the "National Major Project of Land Development and Consolidation in Western Jilin" in Da'an City, Jilin Province. The surface soil alkalization degree (ESP) is 46.7%, and the pH value is 9.8, which belongs to the heavily alkalized soil. The purpose of improvement and restoration is to reduce the salinity content of the surface soil and make the soil suitable for rice growth. When preparing the soil, apply 15 tons of inorganic polymer modifier per hectare, then soak the field, harrow and stir to dissolve the inorganic polymer modifier and mix it with the soil. The water consumption for soaking and washing is 410 cubic meters per hectare, and rice is transplanted after 2 to 3 days. According to local normal rice field management. After harvest in autumn, the soil alkalinity was 14.2%, the pH value was 7.92, and the yield was 8001 kg / ha.

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Abstract

The invention discloses a method for modifying the soda alkalized soil into the paddy field by an inorganic macromolecular soil modifier. The component of the inorganic macromolecular modifier is solid polymerized ferric sulfate. When the soda alkalized soil is modified into the paddy field by the inorganic macromolecular soil modifier, the modifier is soaked by water in the soda alkalized soil to be fast hydrolyzed, a mass of high-valence cations can be generated to replace exchangeable sodium ions in the soil so as to reduce the alkalization degree of the soil, the replaced sodium ions are discharged along with the drainage through elution, the polyhydroxy complex generated after hydrolysis can play a role of flocculation to the high-dispersion degree soil colloid such as absorbing, bridging, enmeshing and the like, the particulates of the soil colloid are promoted to be gathered into large particulates, the soil permeability is enhanced, and the PH value of the soil can be further reduced due to the hydrolysis acidity-induction effect of the modifier, so that a good soil environment for crops growth can be provided. After the method is used, the soda alkalized soil can be fast modified into the paddy field, so that the method is suitable for popularization and application in agricultural production.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a method for quickly improving soda alkalized soil into a paddy field with an inorganic polymer soil improver. Background technique [0002] For heavily soda alkalized soils, chemical improvement is one of the main approaches. The chemical modifiers currently reported mainly include calcium chloride, gypsum, phosphogypsum, flue gas desulfurization gypsum, sulfuric acid, hydrochloric acid, sulfur, pyrite, aluminum sulfate, etc. Among them, gypsum, phosphogypsum, and smoke Gas desulfurization gypsum and other gypsum modifiers. The main chemical component of this kind of amendment is calcium sulfate. The improvement principle is to use the dissolved calcium ions to replace the soil exchangeable sodium ions. Due to its slow dissolution rate, the improvement effect is slow, which cannot meet the improvement speed requirements of some major land consolidation and restoratio...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01B77/00C09K17/04C09K101/00
Inventor 李取生秦利鹏张乾坤
Owner JINAN UNIVERSITY
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