At present, the relatively good organic fertilizers developed by agricultural scientists and technicians are as follows:
1. Solid fertilizers are fully decomposed cake fertilizers: the number of effective living bacteria is .2 billion units, organic NPK is 8.5%, organic matter (carbon C) is 85%, and others contain all effective nutrients such as trace elements, vitamins, amino acids and humic acid.
2. As a liquid or paste organic fertilizer, it is biochemical potassium fulvate: organic NPK15%, organic C5%, humic acid Ha46.3%, amino acid A8%, others contain 16 kinds of trace elements and vitamins, especially organic sensitizer active substances (plant endogenous hormones). And is an important organic fertilizer material of patented organic chelated concave-convex granular fertilizer with high fertilizer utilization rate and wide adaptability. This product can be sprayed with 1kg per mu, and the comprehensive effect is very obvious.
3. In addition, some valuable new organic materials are being used to produce fertilizers, such as high-protein fish, soybeans, protein powder, amino acids and feed-grade fish meal. Practice has proved that it is not advisable to make organic fertilizer directly, such as nutrient utilization rate and input-output ratio. It is more scientific if most nutrient energy is converted by animals first, and then fertilizer is made.
Of course, cow's head powder with high available phosphorus, as well as plant straw, seaweed, guano, natural phosphogypsum, humic acid, diatomite minerals, etc. are really some good raw materials for organic fertilizer, which are worth comprehensive development and utilization. In the future process of modernization of green, ecological and organic agricultural industries in the world, these quite good natural organic fertilizers will play a great role in ecological protection, low carbon and energy saving.
Reference: Baidu Encyclopedia Baidu knows the selenium-enriched industrial park of modern agriculture, and the selenium-enriched agricultural internet bar in China.