Study On Prouduction And Application Of Protein Feed For Dairy Cattle From Cheat Waste Byproduct Through Solid Fermentation

With the development of agriculture, the waste byproduct from agriculture has been increased. Comprehensive find scientific utilization of the waste material not only influences duration development of agriculture but also brings economic and social benefits. We choose straw, wheat bran rice bran and beer dreg as test material, and Aspergillus niger B181, Bacillus subtilist as fermenting fungi, then we study the protein content variation after single fungi fermentation and mixed fungi co-fermentation. By single factor test and perpendicular test, different nitrogen source is studied to show the impaction on protein of fermenting products, meantime, optimum inoculation temperature and cultivate time are fixed. The influence of milk producing ability and health condition of the dairy cattle fed by fermented product was testified by feeding experiment.Results show that when the fermentation strain ratio of Aspergillus niger B181 Bacillus is 2:2:1, and the inoculation is about 1%, the content of raw protein in the product increases to 26.2%. By single factor test and perpendicular test, we confirm that optimum condition is that nitrogen source ureal .addition 1.0%,temperature 28 ℃,water proportion 50%,pH natural, cultivate time 48h.Through feeding experiment we find that the fresh fermented product can make each dairy cattle produce more milk by 2.2kg/day and slow down descent of the milk product, meanwhile compensate the descent tendency of milk fat and milk protein.This experiment not only utilize the waste material adequately, which solves the problem of environmental pollution, but also omit drying pelleting store and transport process, which economizes the production cost and bring more profits.