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Crust breaking agent and application thereof

A shell breaking agent and shell breaking technology, applied in the application, organic fertilizer, fertilizer mixture and other directions, can solve the problems of increased pollution, economic loss, reduction, etc., and achieve the effect of easy operation and control of environmental conditions.

Inactive Publication Date: 2016-11-23
SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Magnesium pollution reduces soil quality, reduces crop production, intensifies pollution, and gradually reduces plant species. Plants in severely polluted areas can hardly survive, and only a small number of shrubs and young pine trees survive, causing huge economic losses to agricultural production.

Method used

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  • Crust breaking agent and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] The experimental site is located in the Shenyang Ecological Station of the Chinese Academy of Sciences. The method of artificially filling the soil column is used for the infiltration experiment. The soil is collected from Bali Town, Haicheng City. Physical and chemical properties of the tested soil: pH 8.36, organic matter 6.7g / kg, total magnesium content 18.07g / kg, clay 39.2%, silt 41.6%, gravel 19.3%, water-soluble magnesium 33.53%, water-soluble calcium 25.86 %, exchanged magnesium 1.77%, exchanged calcium 1.29%. The collected soil was air-dried indoors, and after a week, it was ground with a mortar to make it pass through a 2mm sieve for later use.

[0030] Application of soil amendments:

[0031] Control group: weigh 505g of spare soil and put it into a plexiglass column with an inner diameter of 5cm as a control, and the filling height is about 25cm, so that the soil bulk density is about 1.15g cm -3 .

[0032] Test group: Weigh 400g of soil and place it in a ...

Embodiment 2

[0039] The physical and chemical properties of the tested soil and the filling of the soil column are the same as in Example 1, except that:

[0040] Test group: Weigh 400g of soil and put it in the soil column, sprinkle 100g of soil, 5g of magnesium oxide powder, and 4g of calcium dihydrogen phosphate on the surface of the soil column, mix evenly, and sprinkle on the surface of the soil in the soil column. The conditions of the infiltration experiment and the method of alternating wet and dry are the same as in Example 1. The initial penetration rate at the first rinse is 0.61mmmin -1 , although the initial permeation velocity in the second rinse is 1.11mm min -1, after two wet and dry cycles, the initial penetration rate of the third rinse is 1.09mm min -1 . By comparing the results, the penetration rate is slightly increased. Along with carrying out alternately between wet and dry, calcium dihydrogen phosphate accelerates and decomposes the effect of crust to show gradu...

Embodiment 3

[0042] The physical and chemical properties of the tested soil and the filling of the soil column are the same as in Example 1, except that:

[0043] Test group: Weigh 400g of soil and put it in the soil column, sprinkle 100g of soil, 5g of magnesium oxide powder, and 5g of calcium dihydrogen phosphate on the surface of the soil column, mix evenly, and sprinkle on the surface of the soil in the soil column. The conditions of the infiltration experiment and the method of alternating wet and dry are the same as in Example 1. By washing three times and alternating wet and dry twice, the permeation rate increases by 22% compared to Example 1 ( Figure 5 ).

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Abstract

The invention relates to the technical field of improvement and restoration of polluted soil, in particular to a shell breaking agent and its application. The shell breaking agent is calcium dihydrogen phosphate (Ca(H 2 PO 4 ) 2 ). The results of soil column infiltration experiments show that calcium dihydrogen phosphate has a potential improvement effect, and the soil infiltration rate increases with the increase of drying and wetting times. Soil surface Ca(H 2 PO 4 ) 2 The continuous dissolution of the soil reduces the pH of the soil solution, and at the same time provides more calcium ions and dihydrogen phosphate ions to the soil solution, which can promote the dissolution of the soil crust and increase the soil infiltration rate.

Description

technical field [0001] The invention relates to the technical field of improvement and restoration of polluted soil, in particular to a shell breaking agent and its application. Background technique [0002] The reserves and output of magnesite in Liaoning rank first in China and in the world. The development and utilization of mineral resources provides human beings with various materials and energy, but also brings many environmental problems. Soil pollution is a prominent problem in mining activities. According to data, magnesium smelting by Pidgeon method will produce a large amount of waste residue. It is estimated that 10,000 tons of waste residue covers an area of ​​about 1 mu. In 2001, China produced 216,000 tons of magnesium, occupying 140 mu of land. Hard and compact crusts are often seen on the soil surface around the magnesite mine area, and the thickest crusts can reach 10cm in severe areas. Magnesium pollution degrades soil quality, reduces crop production, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K17/06C09K101/00
Inventor 贾春云李晓军方钥蒙台培东
Owner SHENYANG INST OF APPL ECOLOGY CHINESE ACAD OF SCI
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