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Improvement method of heavy loamy alkaline paddy soil

A paddy soil and soil technology, which is applied in the improvement field of heavy loamy alkaline paddy soil, can solve the problem of less research on texture structure improvement of heavy loamy alkalized paddy soil, and achieves elimination of pulping phenomenon, low production cost and high price. low cost effect

Inactive Publication Date: 2020-08-28
ANSTEEL GRP MINING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to provide a method for improving heavy loamy alkalized paddy soil in order to solve the problem of less research on the improvement of heavy loamy alkalized paddy soil texture in the prior art

Method used

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  • Improvement method of heavy loamy alkaline paddy soil
  • Improvement method of heavy loamy alkaline paddy soil
  • Improvement method of heavy loamy alkaline paddy soil

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] Take soil samples from the plow layer (0-20cm) in the heavy loamy alkalized paddy soil area to be improved, and analyze the mechanical composition after air-drying (see Table 1), and the soil bulk density is 1.31g / cm 3 . Screen the iron tailings to retain physical sand particles (0.01mm≤particle size<1mm). Mix the physical sand particles of iron tailings with sulfuric acid solution with a mass concentration of 30% at a soil-water mass ratio of 1:5, let it stand for 48 hours, and air-dry it for later use. At this time, the pH of the acidified iron tailing mineral sand particles is measured to be 2.32 . Analyze the mechanical composition of iron tailing mineral rational sand before and after acidification, and determine the specific content of silt (0.01mm≤particle size<0.05mm) and sand (0.05mm≤particle size<1mm) in physical sand. For specific results, see Table 2 and Table 3.

[0031] Table 1 Mechanical composition of heavy loam alkalized paddy soil

[0032] ...

Embodiment 2

[0045] Take soil samples from the plow layer (0-20cm) in the heavy loam alkalized paddy soil area to be improved, the mechanical composition is shown in Table 6, and the soil bulk density is 1.31g / cm 3 . Screen the iron tailings to retain physical sand particles (0.01mm≤particle size<1mm). Mix the physical sand of the iron tailings with the sulfuric acid solution with a mass concentration of 30% according to the mass soil-water ratio of 1:5, let it stand for 48 hours, and air-dry it for later use. At this time, the pH of the acidified iron tailing mineral sand is 2.28 . See Table 2 and Table 7 for the mechanical composition of iron tail mineral rational sand grains before and after acidification.

[0046] Table 6 Mechanical composition of heavy loam alkalized paddy soil

[0047] Particle size classification 0.01≤~ 0.05≤~ content(%) 31.1 40.5 28.4

[0048] Table 7 Mechanical composition of acidified iron tail mineral rational sand grains

[0049...

Embodiment 3

[0057] Take soil samples from the plow layer (0-20cm) in the heavy loam alkalized paddy soil area to be improved, the mechanical composition is shown in Table 10, and the soil bulk density is 1.31g / cm 3 . Screen the iron tailings to retain physical sand particles (0.01mm≤particle size<1mm). Mix the physical sand particles of iron tailings with the hydrolyzed polymaleic anhydride solution with a solid content of 48% at a soil-water mass ratio of 1:5, let it stand for 48 hours, and air-dry it for later use. At this time, the mineral physical sand particles of acidified iron tailings The pH is 2.23. The mechanical composition of iron tail mineral rational sand grains before and after acidification is the same as Table 2 and Table 11.

[0058] Table 10 Mechanical composition of heavy loam alkalized paddy soil

[0059] Particle size classification 0.01≤~ 0.05≤~ content(%) 31.0 40.6 28.4

[0060] Table 11 Mechanical composition of acidified iron tail ...

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Abstract

The invention provides an improvement method of heavy loamy alkaline paddy soil to solve the problems in the prior art that less research on improving the texture structure of the heavy loamy alkalinepaddy soil is done. The method takes physical sand in iron tailings as the principal thing to perform texture modification on the heavy loamy alkaline paddy soil, reasonably adjusts the silt and sandcontent in physical clay and physical sand in the heavy loamy alkaline paddy soil, and modifies the physical sand into alkalized and strongly alkalized medium loamy soil in the Kachinsky texture standard, so that soil bulk density can be reduced, non-capillary void content can be increased, and therefore, the effects of salt washing and salt discharging can be enhanced. Acidification modificationis performed on the iron tailings; an acidified heavy medium system is constructed; the acidified iron tailings are utilized to control the pH of alkaline paddy soil and neutralize the electronegativity of colloidal particles; and through the effects of collision, surface adsorption, Van der Waals force and coordinated settlement, the particles can be rapidly destabilized, the water immersed bulkdensity of the alkaline paddy soil can be increased, and pulping phenomenon of the alkaline paddy soil can be eliminated.

Description

technical field [0001] The invention belongs to the technical field of saline-alkali soil improvement, in particular to a method for improving heavy loam alkalized paddy soil. Background technique [0002] Saline-alkali soil is a general term for saline soil, alkaline soil and various salinized and alkalized soils formed after the soluble salt in soil or groundwater accumulates on the soil surface. Among them, saline soil refers to the soil that contains a large amount of soluble salts and makes most plants unable to grow, and its salt content is generally more than 0.6%; alkaline soil refers to the soil whose substitution rate (ESP) of sodium ion cation substitution exceeds 20%. strong alkaline soil. In agricultural production, too high soil salinity will cause plant cells to lose water, resulting in "physiological drought", while too high alkalinity can cause soil dispersion, reduce the number of water-stable aggregates, and cause damage to plant cells Toxic, causing phy...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01B79/02G16C60/00C09K17/40C09K101/00C09K109/00
CPCA01B79/02G16C60/00C09K17/40C09K2101/00C09K2109/00
Inventor 邵安林许灏高江潘大伟
Owner ANSTEEL GRP MINING CO LTD
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