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Treatment method for reclamation soil fertility improvement of coal mining subsidence area

A treatment method and technology for subsidence areas, applied in land preparation methods, nitrogen fertilizers, potash fertilizers, etc., can solve problems such as unoptimistic improvement effects, increase the use of chemical fertilizers, and increase costs, so as to solve the problems of reclaiming soil fertility and crop yield, improving Effects of reclaiming soil fertility and crop yield, increasing wheat crop yield

Inactive Publication Date: 2018-09-28
HUAIBEI NORMAL UNIVERSITY
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Problems solved by technology

At present, the main reclamation method in the subsidence area is mainly to dig on the ground and increase the use of chemical fertilizers. The improvement effect is not optimistic. On the contrary, the large-scale application of chemical fertilizers not only increases the cost, but also causes soil acidification, soil compaction, soil pollution and water pollution. Eutrophication and other issues; at the same time, the excessive use of chemical fertilizers significantly increased the greenhouse gas CO 2 、CH 4 and N 2 O emissions

Method used

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  • Treatment method for reclamation soil fertility improvement of coal mining subsidence area
  • Treatment method for reclamation soil fertility improvement of coal mining subsidence area

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Embodiment 1

[0018] 1. Pot experiment: The soil for the test was collected from the coal mining subsidence area of ​​Xincai Town, Huaibei City, Anhui Province. In this reclamation area, the land is leveled by digging deep and shallow pads to reclaim unused farmland soil. In October 2016, the surface soil of 0-20cm in the reclamation area was collected, and the soil was air-dried, ground, and passed through a 2mm sieve for later use.

[0019] 2. The potted culture experiment was carried out in the form of open-air potted plants from March 2017 to June 2017.

[0020] (1) There are 4 treatments in the pot experiment: no inorganic fertilizer and biochar treatment are used as the control treatment (CK); 3 treatments are set for biochar, which are 0%, 1% and 2% of inorganic fertilizer respectively. Biochar treatment, 0% biochar treatment with inorganic fertilizer (NPK); 1% biochar treatment with inorganic fertilizer (NPKB1); 2% biochar treatment with inorganic fertilizer (NPKB2). Add the prepa...

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Abstract

The invention discloses a treatment method for reclamation soil fertility improvement of a coal mining subsidence area. The treatment method comprises the following steps: processing biomass charcoalgenerated by thermal cracking carbonization of straw in a certain degree, according to 1%-2% of an application amount, uniformly spreading on the surface of soil with an inorganic fertilizer mixture,and adequately mixing with the soil. The treatment method has the effects of improving a reclamation area soil structure, increasing soil fertility and remarkably increasing the yield of wheat crops.Through the combined application of the inorganic fertilizer and the biomass charcoal, organic carbon, total nitrogen, available phosphorus and available potassium ingredients of the soil can be remarkably improved, the recycling utilization of farmland crop straw can be realized, technical problems of improving the reclamation soil fertility and the crop yield can be solved, and the treatment method is provided for the soil fertility improvement of the coal mining subsidence area in China.

Description

technical field [0001] The invention belongs to the technical field of soil improvement, and in particular relates to a treatment method for improving soil fertility and reclamation in coal mining subsidence areas. Background technique [0002] Coal is an important energy source in our country, and a large amount of coal mining has caused large-scale subsidence of the earth's surface. After the coal mining subsidence, the ground surface was destroyed, and the original cultivated land gradually formed slope dry land and perennial water accumulation area. Compared with before the coal mining subsidence, the cultivated land quality has declined, and the soil structure has been severely damaged. In addition, the coal gangue and fly ash produced in the coal mining process will also affect the growth and quality of crops after soil reclamation after entering the soil. [0003] Due to the low content of organic matter and soil fertility in the coal mining subsidence area, the rec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04A01B79/02C05G3/80
CPCA01B79/02C05B7/00C05G3/80C05C3/00C05D1/02C05D9/00
Inventor 刘远李峰王广利张辉熊明华徐大勇曾昕
Owner HUAIBEI NORMAL UNIVERSITY
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