Method for preparing organic fertilizer from cotton stalks

Abstract

The invention belongs to the field of preparation of organic fertilizers, in particularly to a method for preparing an organic fertilizer from cotton stalks. The method comprises the steps of (1)crushing: performing skin-core separation on the cotton stalk raw material, removing cotton bolls, leaves and twigs, then crushing the core material, or directly performing crushing without skin-core separation; (2) blending: uniformly mixing the material obtained in the step (1) with excrements of livestock and poultry, wherein the amount of the material obtained in the step (1) accounts for 30-70% the total weight of a formed mixture; (3) detonating processing: putting the formed mixture in a sealed pressure container, introducing high-pressure steam for heating and pressurizing, keeping the air pressure at 0.8-2.5 MPa for 5-15 min, and releasing the processed material and releasing steam pressure to atmosphere pressure within 60-75 ms, so as to enable the processed material to be blasted out; (4) fermenting: mixing the material processed in the step (3) with a biological agent, controlling the water content at 45-60%, and performing full fermentation and decomposition; and (5) baking: baking the material processed in the step (4) to the water content less than 20%. The method solves the long-standing problems of low fermentation efficiency and low stalk utilization rate during preparation of organic fertilizers from cotton stalks, and the organic fertilizer prepared according to the disclosed method has the nutrients with a level higher than the national standard.

Description

technical field [0001] The invention belongs to the field of organic fertilizers, in particular to a method for preparing organic fertilizers from cotton stalks. Background technique [0002] Chemical fertilizers are the most basic and one of the most important material inputs for agricultural production. Long-term application causes soil compaction, nutritional imbalance, accelerates soil acidification, reduces the activity of microorganisms in the soil, and makes it difficult for substances to be transformed and degraded. Soil compaction refers to the lack of organic matter on the soil surface, poor structure, structural damage and soil material dispersion under the action of external factors such as irrigation or rainfall, and the soil surface is hardened by cohesive force after drying. [0003] Bio-organic fertilizer is a new type of fertilizer recommended by the Ministry of Agriculture and the General Administration of Quality Supervision, Inspection and Quarantine of t...

AI Technical Summary

Problems solved by technology

[0007] However, when the existing technology of using waste crop stalks to produce organic fertilizers is used to prepare organic fertilizers from cotton stalks, there are long-term problems of insufficient precipitation of organic matter, low fermentation efficiency, and low utilization rate of straws, mainly because Cotton straw has higher lignocellulose, glue-like substances and protein content than ordinary straw.