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

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...

AI Technical Summary

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, there is a risk in long-term application

In addition, the annual output of rice straw in my country is about 6*10 8 tons, the quantity is very large, most of the rice stalks are lost through incineration, the incineration process will not only pollute the air quality, but also release a large amount of carbon dioxide to exacerbate the greenhouse effect

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