南京农业大学学报2024，Vol.47Issue(1)：151-156,6.DOI:10.7685/jnau.202212002
发酵饲料对育肥湖羊生产性能、养分表观消化率、瘤胃发酵特性及肉品质的影响
Effects of fermented feed on production performance,nutrient apparent digestibility,rumen fermentation characteristics and meat quality of fattening Hu sheep
摘要
Abstract
[Objectives]This experiment was conducted to investigate the effects of different proportions of fermented feed in diets on rumen fermentation characteristics,nutrient apparent digestibility,performance and meat quality of fattening Hu sheep.[Methods]A total of 70 healthy Hu-sheep about 6 months old with similar body weight(30.86±4.50)kg were randomly divided into 5 groups(n= 14).The basal diet in each group was supplemented with 0%(control group),2%,4%,6%and 8%fermented feed(beneficial bacteria content≥1×108 CFU·g-1),respectively.Rumen fluid was collected at 45 d.During the trial period from 43 days to 45 days,dietary and fecal samples were collected to determine nutrient apparent digestibility.The growth performance indexes were measured according to the feed intake and initial and final weight during the test period.At the end of the experiment,3 fattening sheep were randomly selected from each group to be slaughtered for the determination of carcass traits and meat quality.[Results]The average daily gain(ADG)of 6%fermented feed supplemental level significantly increased(P<0.05),the ratio of feed to gain(F/G),average daily feed intake(ADFI)and dry matter intake(DMI)significantly decreased(P<0.01).When the fermented feed supplemental level was 8%,the slaughter percentage significantly increased compared with the control group(P<0.05).The nutrient apparent digestibility indexes significantly increased when 2%and 4%fermented feed were added(P<0.05).Different proportions of fermented feed had no significant effects on the contents of ammonia nitrogen(NH3-N),bacterial protein(BCP),acetic acid,butyric acid,ratio of ethylene to propylene total volatile fatty acid(TVFA)and meat quality of fattening sheep(P>0.05),but at 6%fermented feed supplemental level,pH value significantly decreased(P<0.05),and propionic acid significantly increased(P<0.05).[Conclusions]The supplementation of 6%fermented feed can improve nutrient apparent digestibility and performance of fattening Hu sheep,and has a positive effect on improving rumen fermentation characteristics.关键词
发酵饲料/育肥羊/生长性能/养分表观消化率/瘤胃发酵特性/肉品质Key words
fermented feed/fattening sheep/production performance/nutrient apparent digestibility/rumen fermentation characteristics/meat quality分类
农业科技引用本文复制引用
金宏,柏杨,邓孟云,张敏,马婷,华金玲..发酵饲料对育肥湖羊生产性能、养分表观消化率、瘤胃发酵特性及肉品质的影响[J].南京农业大学学报,2024,47(1):151-156,6.基金项目
安徽省科技重大专项项目(1703001060) （1703001060）
研究生科学研究项目(YK202116) （YK202116）
安徽省大学生创新创业训练计划项目(S202110879174) （S202110879174）
