Biochar fertilizer and preparation method thereof

Abstract

The invention discloses a biochar fertilizer which is prepared from the following raw materials in parts by weight: 60-80 parts of biochar, 20-50 parts of compound fertilizers and 15-25 parts of additives. According to the biochar fertilizer disclosed by the invention, crop straws serve as raw material components, the adopted raw straws are low in cost and highly available in source, are subjected to dehydration and deoxygenation treatment and ground into biochar powder in a high temperature carbonization manner, the carbonization effect is good, the char content is 25% or higher, the carbonization rate of the straws is effectively improved, and the char fertilizer is high in yield, good in fertilization effect and capable of passivating heavy metals in soil and improving the activity of microbes in the soil. Moreover, the fertilizer has large specific surface area, and the content of organic matters in the soil is improved. As a low-cost non-chemical fertilizer, the product disclosed by the invention can provide a yield guarantee for organic agriculture and green agriculture, and the preparation method is simple, controllable and easy to implement.

Description

technical field

[0001] The invention relates to the fields of high-value comprehensive utilization of biomass resources and environmental pollution control, in particular to a biochar fertilizer and a preparation method thereof. Background technique

[0002] No matter in the fields of food crops or commercial crops, fertilization has been used for a long time to improve crop yield and quality. From the earliest application of farm organic fertilizers to the application of inorganic fertilizers, and then to the application of organic-inorganic compound fertilizers. Fertilizer type, fertilization amount and ratio have a great impact on the yield and quality of food crops or economic crops. Although traditional fertilizers, especially organic-inorganic compound fertilizers, have played a good role in increasing crop yields. However, traditional fertilizers have an unreasonable ratio of ingredients and nutrients, which can hardly restore soil fertility, improve soil structure,...