Mixture biological carbon used for improving acidic soil and preparation method thereof

A technology of acidic soil and mixture, which is applied in the direction of fertilizer mixture, carbon preparation/purification, soil conditioning materials, etc., can solve the problems of carbon dioxide intensifying the greenhouse effect, polluting air quality, eutrophication pollution, etc., and achieve comprehensive and efficient improvement effects. Fertility-enhancing, highly targeted effects

Inactive Publication Date: 2017-10-17
ZHEJIANG UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

If the manure is directly applied to the field as an organic fertilizer, it will have some negative effects, for example, the pig manure smells bad and carries some pathogenic bacteria, and the N and P elements in the pig manure will cause eutrophication after leaching into the water body Pollution, and pig manure contains high heavy metal content...

Method used

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  • Mixture biological carbon used for improving acidic soil and preparation method thereof
  • Mixture biological carbon used for improving acidic soil and preparation method thereof
  • Mixture biological carbon used for improving acidic soil and preparation method thereof

Examples

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Embodiment 1

[0045] Embodiment 1, a kind of preparation method that is used to improve the mixture biochar of acidic soil, carries out following steps successively:

[0046] A), collecting manure and stalks as raw materials, respectively pig manure and rice straw, which are naturally air-dried at room temperature so that the water content is lower than 5%, and pulverized, and the pulverized particles≤5mm, thereby obtaining respectively Pig manure pellets, straw pellets;

[0047] B), the pig manure collected in step A) is mixed evenly with straw in different mass ratios, respectively 1:3, 1:1, and 3:1, placed in an anaerobic airtight container, and heated to 300 °C in a muffle furnace. , 400, 500, 600, 700 degrees Celsius, the heating rate is 20℃ / min, and the heating time is 2 hours. The obtained biochar is cooled to room temperature, and further pulverized into granules with a particle diameter of ≤3 mm; the mixture biochar for improving acidic soil is obtained.

[0048] C), characteri...

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PUM

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Abstract

The invention discloses a mixture biochar for improving acidic soil. The preparation method comprises the following steps: 1) Manure and straw are subjected to the following treatment respectively: first drying to a moisture content of ≤5%, and then pulverizing to a particle size of ≤ 5mm, so as to obtain manure granules and straw granules respectively; 2) Mix manure granules and straw granules according to the weight ratio of 3~1:1~3, and then put the mixture into an anaerobic airtight container and heat it to 300~700℃ Heat treatment for 2±0.25 hours; get a mixture of biochar for improving acidic soil. The invention uses manure and straw mixtures of different mass ratios as raw materials, and prepares novel high-efficiency biochar at different pyrolysis temperatures, which is used to improve the fertility of acidified soil, reduce soil acidity, and reduce the toxicity of heavy metals in soil.

Description

technical field [0001] The invention relates to the technical field of fertilizers, in particular to a method for preparing biochar with different ratios of manure and straw mixtures as raw materials and the characterization of its properties. Background technique [0002] In my country, soil acidification has become a very serious problem of soil degradation. Soil acidification will lead to the reduction of soil pH, the loss of nutrients and the activation of aluminum ions, thereby reducing soil fertility and reducing crop yields. At present, acidified soils are widely distributed in my country. Soil acidification occurs not only in the tropical and subtropical regions south of the Yangtze River, but also in the temperate regions of northern my country (which have a certain buffering capacity for acidification). tendency to exacerbate acidification. These current situations show that solving the problem of soil acidification, especially finding a new and efficient acidifyi...

Claims

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Application Information

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IPC IPC(8): C09K17/02C01B32/05C09K109/00
CPCC09K17/02C09K2109/00
Inventor 戴中民徐建明刘杏梅
Owner ZHEJIANG UNIV
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