Method for producing acid soil modifier by using agricultural waste

Abstract

The invention relates to a method for producing an acid soil modifier by using agricultural waste. The method comprises: crushing agricultural waste, and heating one part of the crushed agricultural waste in the absence of air to obtain biomass carbon powder; and mixing the biomass carbon powder, the other part of the crushed material, and limestone powder, and uniformly stirring to obtain the finished product. With application of 50-500 kg of the soil modifier on per mu of soil, soil acidity can be effectively reduced, physical and chemical properties of soil can be improved, and economic values of crops can be increased. In addition, the acid soil modifier has characteristics of wide raw material source, low product cost, simple production process, no toxicity and no harm, is a green soil modifier, and has good ecological and social benefits.

Description

technical field [0001] The invention relates to a method for producing an acidic soil conditioner by using agricultural waste, and belongs to the field of agricultural technology or the technical field of agricultural waste utilization. Background technique [0002] Soil acidification is a process in which the concentration of protons in the soil gradually increases. Soil acidification can be caused by natural or human factors. Natural factors such as soil parent material itself is acidic, high temperature and rainy environmental conditions, acidic substances produced by plant roots or soil microbial metabolic activities; human factors such as large-scale application of chemical fertilizers, acid rain, etc. my country has about 200,000 km 2 The pH of the soil is less than 5.0, showing serious acidification. Soil acidification has a great impact on the planted crops, which will inhibit the development of crop roots, resulting in the obstruction of calcium, magnesium, potas...

AI Technical Summary

Problems solved by technology

[0004] People are accustomed to using lime to improve acidic soil. Applying lime is a more effective and classic method to improve acidic soil and eliminate aluminum toxicity, but there are many shortcomings: one is that it will make the soil harden and the soil quality will deteriorate; the other is that it is effective Nutrients are prone to calcification, resulting in waste of fertilizers; the third is to destroy the aggregate structure of the soil

Therefore, there are many potential hazards in the method of ameliorating acidic soils with heavy lime application

In addition, people also try to use other alkaline substances, such as fly ash, slag, steel slag and other industrial solid waste to improve the soil, but these substances contain harmful substances such as heavy metals, and long-term application will also have adverse effects on the soil

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