Straw feed fermented by white rot fungus and preparation method thereof

Abstract

The invention relates to a straw feed fermented by white rot fungus and a preparation method thereof, and strain is the combination of white rot fungus Tf1 (pleurotus sajor-caju) and JG1 (pleurotus cornucopiae) which are screened in an oriented way, so that solid fermentation fungicide is cultured and prepared by three-stage propagation. Straw is pretreated by quicklime instead of being processed by high temperature sterilization without being washed by water or neutralized by acid. The obtained straw is accessed with white rot fungus composite fungicide to be fermented for 15-20 days, thus being taken as a first step of fermentation for degrading lignin in the straw and improving the straw digestion utilization rate of ruminant. After that, the fermented straw is accessed with yeast to be fermented for 3-4 days, thus being taken as a second step of fermentation for improving the crude protein content of the straw and further enhancing the nutritional value of the straw feed. After the two steps of fermentation, the crude fiber content of the straw is reduced by over 25%, the dry matter rumen (nylon bag technique) digestion rate is improved by over 20%, the crude protein content is increased by more than 50%, and the straw feed has no safety risk when being fed for animals. The invention has the characteristics of no energy consumption, no pollution, low cost, easy operation, high feeding value of the straw, and being suitable for local production of villages in China.

Description

1. Technical field: [0001] The invention belongs to the application field of microbial resources, and relates to a method for utilizing crop stalks as feed. 2. Background technology: [0002] At present, the mature technology of straw feed in my country is mainly silage and ammoniation, but the silage technology only prolongs the usable period of green fodder and improves the palatability, but does not make much contribution to the improvement of the nutritional value and animal digestibility of straw. Species and season restrictions. The cost of ammonification treatment is high, which not only competes with agriculture for fertilizer, but also easily causes environmental pollution and ammonia poisoning of animals. The existence of these problems restricts the further improvement of straw feed utilization. In recent years, the micro-storage (microbial storage) technology tested and applied in some areas of my country has solved the limitations of silage and ammonification t...