Study On Biochemical Treatment Technique For Crop Foddor And Application Of Systematic Nutrient Manipulation In Formulating Total Mixed Rations Of Mutton Sheep

The biochemical processing methods were applied in the first experiment to improve nutrient value of crop fodder and its degradation rate in situiand based on in viro, other experiments were conducted to study the effects of various concentration/roughage of mutton sheep total mixed ration and rumen manipulation doses on crude fiber degradation and fermenting synthesized production of the tested rations.1. Study on biochemical treatment methods to improve nutrient value of crop fodderThe Orthogonal Experiment Design [L18 (61X3) ] of seven factors was applied in this experiment and through biochemical treatment methods the maize stover, wheat straw and rice straw were processed, then by nutrient ingredients detection of the treated fodder to screen the optimum method of improving their nutrient value in this test. Meanwhile, the in situ degradation rate of the treated and untreated fodder were determined with 4 Tan-Han crossbreed castrated sheep fitted with permanent cannulas in the rumen. The results show that the crude protein percentage content of maize stover be improved from 3.65% to 14.44%, and its DM.NDF, ADF in situ degradation rate is higher than untreated maize stover(p<0.05) ;the NDF and ADF percentage content of treated wheat straw decreased by 25.91% and 24.38% respectively compared with untreated wheat straw by using optimum methods in this study.2. Associative effects of different feeds on in vitro crude fiber degradation and fermentation effects of various fattening lamb total mixed rationsThree Tan-Han crossbreed castrated lamb fitted with permanent cannulas were used as donated animals for collecting rumen fluid. Applying the method of in vitro gas production and comprehensive judgment of multiple factors, with the multiple factors of gas production, microorganism protein production, degradation rate of crude fiber, VFA production and concentration of NHa-N, to evaluate the fermentation effects of 15 kinds of various feed and nutrient compose of fattening lamb total mixed rations. The results show that the associative effects of ration on its in vitro fermentation results is significantly(p<0.05),and the comprehensive fermentation character of the ration, which roughage and concentration rate is 45:55and the biochemical treatment corn straw and alfalfa powder substitute rate in ration are 35% and 20% respectively, is the best. 3. Different rumen manipulation doses on in vitro crude fiber degradation and the fermentation effect of various fattening lamb total mixed rationsThree Tan-Han crossbreed castrated lamb fitted with permanent cannulas were used as donated animals for collecting rumen fluid. Based on in vitro, the experiment was conducted to study on the effects of different rumen manipulation doses on the fermentation effect of various fating lamb total mixed ration . The results showed that when the tested ration added monesin and fermented in vitro, the yield of bacterial-N and the crude fiber(CF) degradation were increased with the increase of monesin concentration at first and reached maximum value as the monesin concentration were 0.0287mg/ml and 0.0323mg/ml respectively;The effect of monesin concentration on the yield of bacterial-N was significantly(p<0.05);The gas production was restrained after monesin was added in the tested ration; The acetone yield was decreased with the increase of monesin concentration ; The yield of bacterial-N in fermenting solution was increased when YC was added in the ration but the difference was not significant compared with the control group(p>0.05);However, YC effect the crude fiber degradation significantly after fermenting 24h in vitro(p<0. 05), and the concentration of NHrN was higher than control group(p<0.05),but on the acetic acid/acetone , the YC effect was not significantly(p>0.05). Meanwhile, the experiment results showed that monesin, YC and rare earth have distinct interaction on the fermentation results of test ration.