摘要
本试验旨在研究发酵精料对安格斯阉牛生长性能、血清生化指标和养分表观消化率的影响。选取体况良好、体重[(637.75±50.99)kg]相近的安格斯阉牛45头,随机分为3组,每组15头。对照组(CON组)饲喂基础饲粮,试验组分别用发酵精料替代基础饲粮中15%(F15组)和30%精料(F30组)。预试期14 d,正试期60 d。结果表明:1)与基础精料相比,发酵精料粗灰分(Ash)含量显著提高(P<0.05),中性洗涤纤维(NDF)含量有降低趋势(P=0.06)。发酵精料酸性蛋白酶和纤维素酶活性较发酵前明显提高,淀粉酶活性无明显变化。2)第1~30天,与CON组和F15组相比,F30组阉牛平均日增重(ADG)显著提高(P<0.05),干物质采食量(DMI)有提高趋势(P=0.09),料重比(F/G)显著降低(P<0.05)。3)与CON组和F15组相比,F30组阉牛血清谷草转氨酶(AST)活性显著降低(P<0.05),血清尿素(UREA)含量有降低趋势(P=0.05)。4)与CON组和F15组相比,F30组阉牛粗蛋白质(CP)表观消化率有提高趋势(P=0.06)。综上所述,发酵精料按30%的比例替代基础精料能够在育肥前期改善安格斯阉牛生长性能,并有提高其蛋白质消化吸收的潜力。
This experiment was conducted to investigate the effects of fermented concentrate on growth performance,serum biochemical indices and nutrient apparent digestibility of Angus steers.Forty-five healthy Angus steers with similar body weight of(637.75±50.99)kg were randomly divided into 3 groups with 15 steers in each group.Cattle in the control group(CON group)were fed a basal diet,and those in the experimental groups were fed 15%(F15 group)and 30%(F30 group)fermented concentrate instead of the concentrate in the basal diet,respectively.The pre-trial period lasted for 14 days,and the experimental period lasted for 60 days.The results showed as follows:1)compared with the basal concentrate,the crude ash(Ash)content in fermented concentrate was significantly increased(P<0.05),and the neutral detergent fiber(NDF)content had a tendency to be decreased(P=0.06).The activities of acid protease and cellulase in fermented concentrate were significantly higher than those before fermentation,but the amylase activity had no significant change.2)From days 1 to 30,compared with CON group and F15 group,the average daily gain(ADG)of steers in F30 group was significantly increased(P<0.05),the dry matter intake(DMI)showed an increasing trend(P=0.09),and the ratio of feed to gain(F/G)was significantly decreased(P<0.05).3)Compared with CON group and F15 group,the serum aspartate transaminase(AST)activity of steers in F30 group was significantly decreased(P<0.05),and the serum urea content had a decreasing trend(P=0.05).4)Compared with CON group and F15 group,the crude protein(CP)apparent digestibility of steers in F30 group tended to be increased(P=0.06).In conclusion,the replacement of basal concentrate with fermented concentrate at 30%can improve the growth performance of Angus steers in the early fattening stage,and has the potential to improve their protein digestion and absorption.
作者
任凌煜
崔晓婧
吴浩
孟庆翔
吴连方
周振明
REN Lingyu;CUI Xiaojing;WU Hao;MENG Qingxiang;WU Lianfang;ZHOU Zhenming(State Key Laboratory of Animal Nutrition and Feeding,College of Animal Science and Technology,China Agricultural University,Beijing 100193,China;Beijing Doudian Hengsheng Animal Husbandry Technology Co.,Ltd.,Beijing 102400,China)
出处
《动物营养学报》
北大核心
2025年第4期2431-2440,共10页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家重点研发计划项目(2023YFD1301302)。
关键词
发酵精料
肉牛
生长性能
血清生化指标
养分表观消化率
fermented concentrate
beef cattle
growth performance
serum biochemical indices
nutrient apparent digestibility
