This experiment was conducted to investigate the effects of different pepper stalk level diets on growth performance,nutrient apparent digestibility and serum indices of Dorper×Hu hybrid lambs.Using a sin-gle-factor completely randomized design,fifty F1 male lambs of Duper × Hu sheep with body weight of(29.58±2.06)kg aged 3 to 4 months were randomly divided into 5 groups with 10 replicates per group and 1 sheep per replicate.The sheep in each group were fed total mixed iso-energetic iso-nitrogenic granule diets con-taining 0(control group),5％,10％,15％and 20％pepper stalk(dry matter basis),respectively.The pre-trial period lasted for 7 days and the experimental period lasted for 66 days.The results showed as follows:1)compared with the control group,the body weight of Duper×Hu hybrid lambs in 20％pepper stalk group on day 57 was significantly decreased(P＜0.05);during days 1 to 28,the dry matter intake(DMI)in 10％pep-per stalk group was extremely significantly increased(P＜0.01),DMI in 15％pepper stalk group and 20％pepper stalk group was significantly or extremely significantly decreased(P＜0.05 or P＜0.01);during days 29 to 56,DMI in 10％pepper stalk group was extremely significantly increased(P＜0.01),and DMI in 20％pepper stalk group was extremely significantly decreased(P＜0.01).2)Compared with the control group,the apparent digestibilities of crude protein and gross energy in 10％pepper stalk group was significantly increased(P＜0.05).3)Compared with the control group,the serum glucose content in 15％pepper stalk group and 20％pepper stalk group was significantly decreased(P＜0.05);the serum total protein content in 10％pepper stalk group and 20％pepper stalk group was significantly increased(P＜0.05).4)Compared with the control group,the serum glutathione peroxidase activity in 5％pepper stalk group and 10％pepper stalk group was sig-nificantly or extremely significantly increased(P＜0.05 or P＜0.01),and the serum malondialdehyde content in 15％pepper stalk group and 20％pepper stalk group was significantly increased(P＜0.05).5)Compared with the control group,the serum interferon-γ content in 10％pepper stalk group and 20％pepper stalk group was significantly increased(P＜0.05).In conclusion,under the conditions of this experiment,feeding diets contai-ning 5％to 15％pepper stalk can improve the growth performance,nutrient apparent digestibility and serum in-dices of Duper×Hu hybrid lambs,and the effect of 10％pepper stalk is better.[Chinese Journal of Animal Nutrition,2024,36(7):4531-4543]
关键词
辣椒秸秆/杜湖杂交羔羊/生长性能/养分表观消化率/血清指标
Key words
pepper stalk/Duper×Hu hybrid lambs/growth performance/nutrient apparent digestibility/ser-um indices
维普
万方数据