Method for preparing organic slow-release fertilizer from cattle manure and fertilizer prepared by method

Abstract

The invention provides a method for preparing an organic slow-release fertilizer from cattle manure, relating to the field of planting/culture waste treatment and organic fertilizer processing. The method comprises the following steps: A. preparing granular straws; B. adding water into EM (effective microorganism) slurry, and spraying the water-added solution on straw granules; C. carrying out sealed fermentation on the straw granules; D. fermenting fresh cattle manure to a decomposed state; E. uniformly mixing the semifinished products in the step C and step D; F. carrying out secondary fermentation; and G. drying, preparing the granular fertilizer, and packaging. The straws are fermented by the EM slurry, so that the cattle manure fertilizer is released in the first time when the fertility is released. The straw granules are subjected to tertiary fermentation underground and are continuously rotten to form the slow-release fertility part. Besides, the fertilizer keeps the soil loose to some extent, thereby being beneficial to quick growth of the root systems of perennial high-cash crops. When being used for growing annual plants, the fertilizer can be applied every other year, thereby reducing the fertilizer application frequency and lowering the cost in the planting process on the premise of ensuring the fertilizer efficiency.

Description

technical field [0001] The invention relates to the fields of planting and breeding waste treatment and organic fertilizer processing, in particular to a method for preparing organic slow-release fertilizer from cow dung and the prepared organic slow-release fertilizer for perennial high-economic crops or annual fertilization every other year Fat. Background technique [0002] Cow dung will pollute the environment if it is not handled properly, but it is necessary for cattle breeding enterprises. Traditionally, cow dung is directly fermented as fertilizer, and some even add straw to cow dung for co-fermentation. However, the above-mentioned fertilizer Fertility is basically maintained for one year, and when it is not applied properly, crops will die due to excessive fertilizer efficiency. Cow dung fertilizers are mostly mixed directly into the soil in the form of granules. After being absorbed, the residue is deposited, forming soil compaction, which is also not conducive t...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of cow dung fertilizers compacting the soil in the prior art, the fertility is strong in the early stage and cannot meet the requirements of perennial high-economic crops to provide fertility for at least 2 years in the later stage. Due to the problem that cow dung fertilizer compacts the soil and slows root growth, at the same time, the method of preparing organic slow-release fertilizer from cow dung that can significantly prolong the duration of fertility and the obtained fertilizer