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Modifying agent for soda-alkalized paddy field soil

A soil conditioner and paddy field technology, which is applied in the direction of soil conditioning materials, chemical instruments and methods, organic fertilizers, etc., and can solve problems such as inapplicability of conditioners and large quantities of conditioners

Inactive Publication Date: 2012-06-27
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the high salinity and alkalization degree of heavily soda-alkaline soil, the number of amendments required per unit area of ​​soil is large, and major land consolidation projects require rapid improvement, so the above-mentioned amendments are not suitable

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The soil to be improved and rehabilitated is heavily alkalized soda soil in Da'an City, Jilin Province, with an alkalinity (ESP) of 45.3% and a pH of 9.5. The purpose of improvement and restoration is to reduce the salt-alkali content of the surface soil so that the soil can be suitable for the growth of rice. The weight ratio of solid polyferric sulfate and solid polyaluminum sulfate of the present invention is 1:0.6 during soil preparation, and 5.6 tons per hectare is applied. According to local normal rice field management. The content of active aluminum in the improved soil was 11.1mg / kg, and the rice grew normally after transplanting. The unit cost is 9.4% lower than that of solid polyferric sulfate. After autumn harvest, the soil alkalinity is 18.6%, the pH value is 8.22, and the yield is 5751 kg / ha, which is equivalent to the improvement of solid polyferric sulfate.

Embodiment 2

[0020] The soil to be improved and rehabilitated is heavily alkalized soda soil in Da'an City, Jilin Province, with an alkalinity (ESP) of 51.3% and a pH of 10.25. The purpose of improvement and restoration is to reduce the salt-alkali content of the surface soil so that the soil can be suitable for the growth of rice. During soil preparation, the weight ratio of solid polyferric sulfate and solid polyaluminum sulfate of the present invention is 1:1, and 12 tons per hectare is applied. According to local normal rice field management. The water-soluble aluminum content of the improved soil is 24.2mg / kg, and the rice has been growing normally after transplanting. The unit cost is 12% lower than that of solid polyferric sulfate. After autumn harvest, the soil alkalinity is 25.7%, the pH value is 8.50, and the yield is 5,553 kg / ha, which is equivalent to the improvement of solid polyferric sulfate.

Embodiment 3

[0022] The improved and rehabilitated soil is a heavily alkalized soda soil in Da'an City, Jilin Province, with an alkalinity (ESP) of 59.4% and a pH of 10.7. The purpose of improvement and restoration is to reduce the salt-alkali content of the surface soil so that the soil can be suitable for the growth of rice. The weight ratio of solid polyferric sulfate and solid polyaluminum sulfate of the present invention is 1:1.4 in soil preparation, and 18 tons per hectare is used. According to local normal rice field management. The water-soluble aluminum content of the improved soil is 45.5mg / kg, and the rice has been growing normally after transplanting. The unit cost is 15% lower than that of solid polyferric sulfate. After autumn harvest, the soil alkalinity is 21.9%, the pH value is 8.30, and the yield is 5788 kg / ha, which is equivalent to the improvement of solid polyferric sulfate.

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PUM

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Abstract

The invention discloses a modifying agent for soda-alkalized paddy field soil. The modifying agent is prepared by mixing polyferric sulfate with polyaluminum sulfate according to the weight ratio of 1:(0.6-1.4) and is suitable for modifying severe soda-alkalized soil into a paddy field; and the modifying method comprises the following steps of: applying the modifying agent to the paddy field soil of the field prior to soil preparation, wherein the application rate is 5.6-18 tons per hectare of soil; carrying out normal soil preparation; and soaking and leaching the soil after the modifying agent is sufficiently mixed with the soil. Compared with the polyferric sulfate, the unit cost of the modifying agent for the soda-alkalized paddy field soil disclosed by the invention is reduced by 9.4-15% under the condition that the same effect is maintained; and compared with the aluminum sulfate soil modifying agent, the macromolecular polymer of the modifying agent has a better flocculation effect and higher modifying efficiency, and meanwhile, the concentration of activated aluminum of soil is controlled to be in a low-concentration level, which is harmless to crops.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a soda alkalized paddy field soil improver. Background technique [0002] my country is one of the countries with the largest distribution of soda alkalized soil in the world. Salt composition of soda alkalized soil with NaHCO 3 Mainly, the characteristics of alkalization are obvious. Soda alkalized soil, as inferior soil, is an important reserve land resource. In areas with relatively abundant water resources, it is of great significance to reclaim and improve heavily soda-alkaline soils into paddy fields to increase the area of ​​cultivated land. [0003] Patent application No. 01140293.8 discloses a saline-alkali soil conditioner, the main component of which is polymaleic anhydride; Humic acid, humic acid, malic acid, humic acid, propionic acid, salicylic acid; Patent No. ZL00105747.2 discloses a saline-alkali soil conditioner, mainly polymaleic acid and alkylbenz...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/08A01B79/02C09K101/00
Inventor 李取生王玥张乾坤秦利鹏
Owner JINAN UNIVERSITY
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