Method for manufacturing biological sustained-release fertilizer by agricultural waste

Abstract

The invention relates to a method for manufacturing biological sustained-release fertilizer by agricultural waste. According to the method, waste vinasse, farm animal excrement and crop stalks and peach twig are mainly used as raw materials to be processed through a unique process of a continuous pool type aerobic fermentation technology. The materials are effectively compounded with functional microbial agents to be processed into fertilizer rich in various trace elements such as N, P and K; then, biomass materials such as the crop stalks and the peach twigs are used for obtaining solid products through pyrolysis under the environment conditions of oxygen limitation and isolation; charcoal is formed; then, other trace elements such as N, P and K in the fertilizer are reasonably adsorbed by using the adsorption performance of the charcoal; the charcoal-based fertilizer is manufactured through extrusion forming. The novel charcoal-based fertilizer has the advantages that the effective living bacteria count is greater than or equal to twenty million / g; the N, P and K content is 6 to 20 percent; the organic matter content is greater than or equal to 25 percent; the humic acid content is higher than or equal to 10 percent; rich medium and trace elements such as active Ca, Mg, B, Zn and Mn are contained; the soil environment can be improved under the condition of ensuring the fertilizer effect; the soil pollution is reduced.

Description

technical field [0001] The invention relates to the field of fertilizer production, in particular to a method for making biological slow-release fertilizer by using agricultural waste. Background technique [0002] At present, the average utilization rate of chemical fertilizers in my country is 30%. Taking nitrogen fertilizer as an example, the average utilization rate in the 1990s was about 35%, but now it has dropped to about 27%. In addition, excessive input of chemical fertilizers, blind application, and low utilization rate of crops will all cause pollution of soil, water, air, and agricultural products. Chemical fertilizers have been regarded as the second only pollution source after pesticides, and the harm they cause is also comparable to that of pesticides. Biological slow-release fertilizer is a good measure to solve this problem, and the slow-release technology of nitrogen fertilizer is being vigorously developed at home and abroad. There are many kinds of cont...

AI Technical Summary

Problems solved by technology

[0003] In today's rural production and life, a large amount of crop waste and animal manure are directly used as fertilizers, and some are even abandoned, which is very wasteful. These are excellent materials for making biological slow-release fertilizers. Therefore, a method that uses crop waste It is particularly necessary to make biological slow-release fertilizers