Evaluation of Feeding Effect of Pepper Straw and Its Silage with Different Treatments on Lambs
In this experiment,the effects of pepper straw and silage pepper straw treated with different addi-tives instead of alfalfa hay on growth performance,digestion and metabolism,rumen fermentation and serum biochemical indexes of lambs were studied to evaluate their nutritional value and feeding effect.Twenty-four 4-month-old Suffolk male lambs with the body weight of(31.13±1.63)kg were randomly divided into 4 groups with 6 lambs in each group.Lambs in control group(CK group)were fed a diet containing 15％alfalfa hay,lambs in experimental groups were fed diets with air-dried pepper straw(PS group),Lactobacillusplan-tarum+Bacillus subtilis pepper straw silage(LP+BS group)and Lactobacillus plantarum+molasses pepper straw silage(LP+M group)instead of all alfalfa hay,respectively.The pre-test period was 10 days and the test period was 50 days.The results show as follows:1)the average daily dry matter intake in the PS group was significantly lower than that in the CK,LP+BS and LP+M groups(P＜0.05),the average daily gain was significantly lower than that in the CK and LP+BS groups(P＜0.05),and the feed/gain ratio was significantly higher than that in the CK and LP+BS groups(P＜0.05),while there were no significant differences in the av-erage daily dry matter intake,average daily gain and feed/gain ratio among the CK,LP+BS and LP+M groups(P＞0.05).2)The apparent digestibility of dry matter(DM),neutral detergent fiber(NDF)and ether extract(EE)in the PS group was significantly lower than that in the CK,LP+BS and LP+M groups(P＜0.05),the apparent digestibility of crude protein(CP)was significantly lower than that in the LP+BS group(P＜0.05),and the apparent digestibility of acid detergent fiber(ADF)was significantly lower than that in the CK and LP+BS groups(P＜0.05),while there was no significant difference in the apparent digestibility of DM,CP,NDF,ADF and EE among the CK,LP+BS and LP+M groups(P＞0.05).3)The pH of rumen fluid in the PS group were significantly higher than that in the LP+BS and LP+M groups(P＜0.05),the ammonia nitro-gen concentration was significantly higher than that in the CK,LP+BS and LP+M groups(P＜0.05),the total volatile fatty acids and butyric acid concentrations were significantly lower than those in the CK,LP+BS and LP+M groups(P＜0.05),and the acetic acid concentration was significantly lower than that in the CK and LP+BS groups(P＜0.05).There were no significant differences in the propionic acid concentration among the four groups(P＞0.05).4)Serum urea nitrogen content in the LP+BS group was significantly lower than that in the CK,PS and LP+M groups(P＜0.05),while there were no significant differences in other serum bio-chemical indexes among the 4 groups(P＞0.05).In conclusion,pepper straw silage prepared by adding Lacto-bacillus plantarum+Bacillus subtilis or Lactobacillus plantarum+molasses,can replace all alfalfa hay in the diet for feeding lambs,and the feeding effect of Lactobacillus plantarum+Bacillus subtilis pepper straw silage is better.[Chinese Journal of Animal Nutrition,2024,36(1):387-396]
万方数据
维普
