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Soil conditioner and preparation method thereof

A soil improver, agricultural technology, applied in the direction of application, organic fertilizer, nitrogen fertilizer, etc., can solve the problems of changing soil physical and chemical structure, reducing visibility, etc., to achieve the effect of improving biological communities, improving water and fertilizer retention capacity, and improving properties

Inactive Publication Date: 2018-08-10
UNIV OF SCI & TECH OF CHINA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the burning of agricultural straw will cause a series of social and environmental problems, such as the production of a large amount of air pollutants (respirable particulate matter, NO x and SO 2 etc.), change soil physical and chemical structure, reduce visibility, etc.

Method used

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  • Soil conditioner and preparation method thereof
  • Soil conditioner and preparation method thereof
  • Soil conditioner and preparation method thereof

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preparation example Construction

[0029] The present invention also provides a preparation method of the soil conditioner, the specific preparation process is as follows: figure 1 shown, including the following steps:

[0030] A) pulverizing coal gangue, phosphate rock powder and quicklime with biochar, urea, ammonium sulfate and compound microbial bacterial agent according to the proportion and mixing to obtain the initial mixture;

[0031] B) The initial mixture is dried and pulverized to obtain a soil conditioner.

[0032]In the process of preparing the soil conditioner, coal gangue, phosphate rock powder and quicklime are first pulverized. In this application, the biochar is preferably prepared from agricultural straw, and the agricultural straw is pulverized at the same time. The particle size of the pulverized agricultural straw is less than 20 mm, and the coal gangue, phosphate rock powder and quicklime are crushed to a particle size of less than 2 mm. After the agricultural straw is crushed, it is py...

Embodiment 1

[0040] 1) Grinding coal gangue, soybean straw, phosphate rock powder and quicklime; crushing soybean straw into particles with a particle size of 2 : 55%; Al 2 o 3 : 28%; Fe 2 o 3 : 3.6%; CaO: 2.7%; MgO: 1.5%; moisture content 24%; soybean straw includes the following components by weight: SiO 2 : 12%; Al 2 o 3 : 3%; Fe 2 o 3 : 0.7%; CaO: 28%; MgO: 9%; Na 2 O: 4%; K 2 O: 17%, moisture content 12%;

[0041] 2) Prepare biochar by pyrolyzing soybean straw for 30 minutes under nitrogen atmosphere at 500°C;

[0042] 3) 60 parts by weight of coal gangue, 30 parts by weight of biochar, 1 part by weight of urea, 1 part by weight of ammonium sulfate, 1 part by weight of phosphate rock powder, 5 parts by weight of quicklime and 1 part by weight of composite microorganisms Bacteria mix;

[0043] 4) drying the mixed material under natural conditions until the water content is 15%;

[0044] 5) Crushing, sieving (passing through a 9-mesh sieve) and subpackaging the dried materia...

Embodiment 2

[0051] 1) Grinding coal gangue, corn stalks, phosphate rock powder and quicklime; crushing corn stalks into particles with a particle size of 2 : 62%; Al 2 o 3 : 24%; Fe 2 o 3 : 4.3%; CaO: 1.6%; MgO: 0.8%; moisture content 26%; corn stalks, the weight ratio of each component is as follows: SiO 2 : 31%; Al 2 o 3 : 2%; Fe 2 o 3 : 1%; CaO: 9%; MgO: 12%; Na 2 O: 5%; K 2 O: 26%; moisture content is 10%.

[0052] 2) Prepare biochar by pyrolyzing corn stalks at 400°C under nitrogen atmosphere for 40 minutes;

[0053] 3) the coal gangue of 70 parts by weight, the biochar of 20 parts by weight, the urea of ​​2 parts by weight, the ammonium sulfate of 1 part by weight, the phosphate rock powder of 3 parts by weight, the unslaked lime of 3 parts by weight and the composite microorganism of 1 part by weight Bacteria mix;

[0054] 4) drying the mixed material under natural conditions until the water content is 10%;

[0055] 5) Crushing, sieving (passing through a 9-mesh sieve) ...

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Abstract

The invention provides a multifunctional soil conditioner and a preparation method thereof. The soil conditioner is based on carrier of coal gangue and comprises, by weight, 55-80 parts of coal gangue, 15-40 parts of charcoal, 1-3 parts of urea, 1-3 parts of ammonium sulfate, 1-5 parts of ground phosphate rock, 3-10 parts of quick lime and 0.5-2 parts of composite microbial agent. The invention further discloses the preparation method of the soil conditioner. The soil conditioner has functions of holding water, saving fertilizer, improving fertility of soil and soil permeability, providing trace elements necessary for growth of plants, adsorbing and curing heavy metal of soil and the like. The soil conditioner and the preparation method thereof have the advantages that raw materials for preparing the soil conditioner are easy to obtain, the preparation process is simple, environmental friendly and safe, and the soil conditioner has good soil conditioning effect, and the like.

Description

technical field [0001] The invention relates to the technical field of soil improvement, in particular to a soil conditioner and a preparation method thereof. Background technique [0002] In recent years, with the extensive mode of agricultural activities and excessive application of pesticides and fertilizers in our country, the soil environment in our country has been greatly damaged, such as the decline of soil fertility, soil compaction, soil salinization and heavy metal pollution. In order to improve soil quality, improve the physical, chemical and biological characteristics of barren soil, and promote the sustainable development of cultivated soil, the application of soil amendments is currently a widely used approach. However, the existing soil improvers have many deficiencies, specifically: 1) the active ingredients of the existing soil improvers are relatively single, which cannot effectively improve the physical and chemical properties of the soil; 2) the existing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05G3/80
CPCC05B17/00C05G3/80C05C3/00C05C9/00C05D3/02C05D9/00C05F11/08
Inventor 周春财刘桂建魏勇
Owner UNIV OF SCI & TECH OF CHINA
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