Sandy soil conditioner and preparation method thereof

The technology of soil conditioner and compound microbial inoculant is applied in the field of sandy soil conditioner, which can solve the problems of unbalanced nutrient content of straw, reduce product cost, long composting cycle, etc., so as to improve water absorption and storage capacity, avoid pollution, Long lasting effect

Inactive Publication Date: 2016-04-13
四川蓉加川大环保工程咨询设计有限公司
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] At present, most of the sandy soil improvers in my country often simply use the physical method of mechanical crushing when using straw as an additive. Due to the simple pretreatment, the composting cycle is longer when composting, and the fertilizer efficiency is poor after returning to the field.
In addition, due to the unbalanced nutrient content of straw, it is necessary to add a certain proportion of inorganic fertilizers, organic nitrogen sources, rare metal compounds and water-retaining agents when it is used for desertification soil improvement, which has not fundamentally reduced product costs.

Method used

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  • Sandy soil conditioner and preparation method thereof
  • Sandy soil conditioner and preparation method thereof
  • Sandy soil conditioner and preparation method thereof

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preparation example Construction

[0027] The preparation method of sandy soil improver of the present invention comprises the following steps:

[0028] a, stalk pretreatment: according to the weight ratio, mix the crop stalks with a particle size≤1.2cm after crushing: 5~15wt% dilute sulfuric acid=1:1~3, mix them in a 0.1~0.3MPa autoclave for 120~ Heating at a constant temperature of 125°C for 1.5-2.5h, washing and sterilizing the stalks with water until the stalks become neutral, drying, and ready to use; wherein, drying is preferably at 60°C;

[0029] b. Preparation of single-strain seed liquid: prepare liquid culture medium for Bacillus subtilis, Candida, white-rot fungus, and Aspergillus niger respectively, take a ring of bacterial lawn from the solid slope of each strain at different times, and then insert them respectively Liquid culture medium, at 25-28°C, shake culture at a rate of 120r / min, to ensure that the logarithmic growth phase of the four bacteria is at the same time, that is, to obtain the seed...

Embodiment 1

[0057] 1) Preparation of straw raw materials

[0058] Crush the crop straw, mix it with 10% dilute sulfuric acid at a mass ratio of 1:2, heat it in an autoclave at a constant temperature of 121°C for 2 hours, then wash the straw with water until neutral, filter it, and dry the straw at 60°C for use.

[0059] 2) Solid-state fermentation of compound microbial agents

[0060] ① Preparation of single-strain seed solution

[0061] Prepare liquid medium for Bacillus subtilis, Candida, white rot fungus, and Aspergillus niger, take a ring of lawn from the solid slope of each fungus at different times, and insert them into the liquid medium respectively, at 25-28°C, 120r / m Shake culture for 1 min, so that Aspergillus niger and white rot fungus were cultured for 40 hours, Candida was cultured for 15 hours, and Bacillus subtilis was cultured for 11 hours to reach the same time, and the seed liquid of each bacterial species in the late logarithmic growth period was obtained.

[0062] ②P...

Embodiment 2

[0071] 1) Preparation of straw raw materials

[0072] Crush the crop straw, mix it with 10% dilute sulfuric acid at a mass ratio of 1:2, heat it in an autoclave at a constant temperature of 121°C for 2 hours, then wash the straw with water until neutral, filter it, and dry the straw at 60°C for use.

[0073] 2) Solid-state fermentation of compound microbial agents

[0074] ① Preparation of single-strain seed solution

[0075] Prepare liquid medium for Bacillus subtilis, Candida, white rot fungus, and Aspergillus niger, take a ring of lawn from the solid slope of each fungus at different times, and insert them into the liquid medium respectively, at 25-28°C, 120r / m Shake culture for 1 min, so that Aspergillus niger and white rot fungus were cultured for 40 hours, Candida was cultured for 15 hours, and Bacillus subtilis was cultured for 11 hours to reach the same time, and the seed liquid of each bacterial species in the late logarithmic growth period was obtained.

[0076] ②P...

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Abstract

The invention relates to a sandy soil conditioner and concretely relates to a sandy soil conditioner prepared from composite bacterium system solid state fermented straws and municipal sludge. A preparation method of the sandy soil conditioner comprises a, straw pretreatment, b, single bacterial strain seed liquid preparation, c, composite microbial agent preparation, d, composite flora solid state fermentation, e, straw-sludge mixture preparation and f, mixture composting. The sandy soil conditioner has a low cost, does not produce secondary pollution, has considerable economic and environmental benefits, can improve a soil structure and a water absorption and storage capability, solves the problem of difficulty of municipal sludge treatment, prevents straw burning-caused environmental pollution and changes wastes into valuables.

Description

technical field [0001] The invention relates to a sandy soil improver, in particular to a sandy soil improver prepared by solid-state fermentation of straw and urban sludge with compound bacteria. Background technique [0002] Land desertification is one of the most serious ecological problems in my country. The large area and wide distribution of desertification have threatened the survival and development space of human beings, leading to a serious decline in land productivity. It is of great practical significance to explore practical techniques and methods for improving sandy soil. [0003] Due to drought, water shortage and poor soil texture are the main driving forces of soil desertification. Therefore, the only way to improve the sandy land is to solve the problems of fast water seepage and evaporation in the sandy soil, lack of organic matter and fertility in the soil, and change the soil into a scattered structure without gathering. At present, various sandy soil...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C05G3/04C05F17/00C05G3/80
CPCC05F7/00C05F17/50C05G3/80C05F11/00C05F11/08Y02W30/40
Inventor 孙芬芬周丽蓉冯琳芝崔泽周
Owner 四川蓉加川大环保工程咨询设计有限公司
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