Effects Of Fermented Chinese Herbal Medicine On Performance,nutrient Digestion And Blood Indexes Of Beef Cattle

The aim of this thesis was to study the effects of adding fermented compound Chinese medicine to the diet on the growth performance,nutrient digestibility,microorganisms in manure and blood indexes of beef cattle.Twenty beef cattle of similar weight(383.67±34.06 kg)and healthy body condition were selected for the experiment and randomly divided into four groups of five cattle each according to the principle of nonsignificant difference in weight.The test group I,test group II,test group III and test group IV were fed with fermented(compound Chinese medicine + substrate),unfermented(compound Chinese medicine + substrate),fermented substrate and unfermented substrate in the basal diet,respectively.The test period was 75 d,including 10 d for the pretest period and 65 d for the main test period,and the test results showed that.(1)Effects of fermented compound Chinese medicine on growth performance of beef cattle: total weight gain(TWG)and average daily gain(ADG)of group Ⅰ were significantly higher than those of group Ⅳ(P<0.05),and the average daily feed intake(P<0.01)and feed weight(P<0.01)were highly significantly increased and reduced(P<0.01).(2)The effect of fermented compound Chinese medicine on the digestibility of nutrients in beef cattle: the digestibility of dry matter was significantly higher in group Ⅰthan in groups Ⅱ,Ⅲ and Ⅳ(P < 0.05),while the difference between the other three groups was not significant(P>0.05);in the digestibility of neutral detergent fiber and acid detergent fiber,group Ⅰ was significantly higher than in groups Ⅱ and Ⅳ(P<0.05),but the difference was not significant compared with group Ⅲ(P>0.05),thus,compared with the unfermented group,the fermented compound Chinese medicine group had more advantages in the digestibility of neutral detergent fiber and acid detergent fiber;the digestibility of crude protein in all four experimental groups was not significantly different(P>0.05).(3)Effect of fermented compound Chinese medicine on fecal microorganisms of beef cattle: at 60 days of the test period,the number of Lactobacillus in feces was significantly higher in groups I and II than in group IV(P<0.05);for the number of E.coli in feces,at30 days of the test period,group I was significantly or highly significantly lower than groups III and IV(P<0.05 or P<0.01);at 30 days of the test period,the number of S.aureus in feces was significantly higher in group III than in the other three groups(P<0.01),and in group IV than in groups I and II(P<0.01),and at 60 days of the test period,the number of S.aureus in feces was significantly higher in group IV than in the other three groups(P<0.01),while the differences among the other three groups were not significant(P>0.01).The difference between the other three groups was not significant(P>0.05);Salmonella was not detected in the fecal samples of all four groups.(4)The effect of fermented Chinese medicine on the biochemical indexes of beef cattle blood: the contents of ALT,AST and TCHO of beef cattle blood in group I were significantly lower than those in groups III and IV(P<0.05),and the contents of CRE in beef cattle blood in groups I and II were extremely significantly lower than those in groups III and IV(P<0.05),while the contents of GLU,UREA,ALB,LDH,TG,Ca2+ and P-in beef cattle blood were not significantly different among the four experimental groups(P<0.05).were not significantly different among the four experimental groups(P>0.05).(5)Effects of fermented Chinese medicine on the blood immune indexes of crossbred beef cattle: the contents of Ig A and Ig G in blood were significantly higher in group I than in groups III and IV(P<0.01),while those in group II were significantly higher than in group IV(P<0.05),and the contents of Ig M,CD4+ and the ratio of CD4+/CD8+ were significantly or highly significantly higher in group I than in group IV(P<0.05 or P<0.01),and the differences in the contents of CD8+ in blood of all groups were not significant(P>0.05).The difference of CD8+ content in the blood of each group was not significant(P>0.05).In conclusion,the addition of fermented Chinese medicine to the diets of Simmental crossbred beef cattle can promote the growth of beef cattle,improve the apparent digestibility of nutrients,improve the blood biochemical status of the organism,enhance its immunity,and have a positive effect on maintaining the health of the beef cattle organism.