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Method for improving soil quality

A technology for improving soil and quality, applied in the field of improving soil quality

Inactive Publication Date: 2016-10-12
CHINA SHENHUA ENERGY CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, there are no reports on large-scale soil texture improvement methods in land reclamation in mining areas such as Shanxi, Shaanxi, and Inner Mongolia.

Method used

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  • Method for improving soil quality

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Spread the pulverized arsenic sand on the land to be improved according to the ratio of arsenic sandstone: soil = 1:2, and then use a rotary tiller for deep rotary tillage, and the number of rotary tillage is controlled at 3 times. According to the improved soil depth range is 20cm, the original soil bulk density is 1.35g / cm 3 According to calculation, 1350t of arsenic sandstone is needed per hectare of land. After the improvement, the test results of the neutron moisture meter show that compared with the comparison phase, the water storage capacity of the 0-50cm soil layer under the present embodiment has increased by 22.3%.

Embodiment 2

[0028] Use a pulverizer to pulverize the arsenic sandstone, and the particle size should be controlled below 20mm.

[0029] Spread the pulverized arsenic sand on the land to be improved according to the ratio of arsenic sandstone: soil = 1:4, and then use a rotary tiller to carry out deep and repeated rotary tillage, and the number of rotary tillage is controlled at 3 times. According to the improved soil depth range is 20cm, the original soil bulk density is 1.35g / cm 3 According to calculation, 675t of arsenic sandstone is needed per hectare of land. After the improvement, the test result of the neutron moisture meter shows that compared with the comparison phase, the water storage capacity of the 0-50cm soil layer under the present embodiment has increased by 19.8%.

Embodiment 3

[0031] Use a pulverizer to pulverize the arsenic sandstone, and the particle size should be controlled below 20mm.

[0032] Spread the pulverized arsenic sand on the land to be improved according to the ratio of arsenic sandstone: soil = 1:6, and then use a rotary tiller to carry out deep and repeated rotary tillage, and the number of rotary tillage is controlled at 3 times. According to the improved soil depth range is 20cm, the original soil bulk density is 1.35g / cm 3 According to calculation, 450t of arsenic sandstone is needed per hectare of land. After the improvement, the test results of the neutron moisture meter show that compared with the comparison phase, the water storage capacity of the 0-50cm soil layer under the present embodiment has increased by 9.6%.

[0033] Although the addition ratio of the arsenic sandstone in Example 1 (the arsenic sandstone: soil = 1:2) is greater than that in Example 2 (the arsenic sandstone: soil = 1:4), the evaporation effect under t...

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Abstract

The invention relates to a method for improving soil quality. The method is characterized in comprising a step of mixing sandstone with soil needing improvement, wherein the ratio of sandstone to soil is (1: 2)-(1: 6), and preferably 1:4. In the method, before sandstone is mixed with the soil needing improvement, there is a step of crushing sandstone. The particle size of the crushed sandstone is lower than 20mm. Further, the method provided by the invention is characterized in that the content of the mixing step is that the sandstone is flatly laid on the soil needing improvement, and is well mixed with soil manually or with a mechanical device. The mechanical device is a rotary tiller. With the rotary tiller, a rotary tillage amount is 2-3 times. The invention also relates to an application of the sandstone in improving soil quality.

Description

technical field [0001] The invention relates to a method for improving soil quality, in particular to a method for improving soil quality by using arsenic sandstone. Background technique [0002] The large-scale open-pit mining of coal resources in my country has caused extremely serious damage to the surface land and ecosystems. Land reclamation and ecosystem restoration after mining are extremely important ecological tasks in this area. According to the national technical standards for land reclamation, the thickness of the soil layer of the reclaimed land should not be less than 50 cm. However, in some areas, especially in Shanxi, Shaanxi and Mongolia, the main soil types are sandy loess and aeolian sandy soil with relatively coarse texture, which have poor water and fertilizer retention capacity. These areas are located in semi-arid areas, the rainfall is only about 400mm, and the rainfall time distribution is extremely uneven, mainly from July to September, resulting in...

Claims

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Application Information

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IPC IPC(8): A01B79/00
CPCA01B79/00
Inventor 郭洋楠郑纪勇何瑞敏
Owner CHINA SHENHUA ENERGY CO LTD
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