摘要
本试验旨在研究不同营养水平对黔北麻羊泌乳性能和养分消化率的影响,为科学制定泌乳期黔北麻羊营养标准提供理论参考。选取体重(37.8±0.79)kg、产羔(7±1)d、1~2胎次、体况良好的泌乳母羊27只,随机分成3组,试验期56 d,预试期为14 d,正试期为42 d。母羊分别采食80%、100%和120%营养需要的日粮,研究不同营养水平对母羊失重、羔羊增重、泌乳量、养分采食和养分消化利用的影响。结果显示:随着营养水平的增加,泌乳羊母体失重减少(P<0.05),羔羊增重增加(P<0.05);母羊泌乳量随营养水平增加而提高(P<0.05),乳脂率、乳蛋白和乳糖含量亦随之增加(P<0.05);日粮中干物质、有机物、总能、粗蛋白、中性洗涤纤维、钙和磷采食量和消化率均随营养水平的增加而提高(P<0.05)。综上,提高营养水平,可促进母羊泌乳,减少母羊失重,增加养分摄入,提高养分消化吸收和促进羔羊生长。黔北麻羊泌乳母羊的适宜营养水平为《中国肉羊饲养标准》中山羊营养需要的120%。
This study was conducted to examine the effects of the feeding of different nutrient levels on the nutrient digestibility and lactation performance of Qianbei Brown goats to provide a theoretical reference for formulating nutritional requirements and supplementary feeding plans of these goats during lactation.Twenty-seven lactating female sheep with a body weight of(37.8±0.79)kg,that would lamb in(7±1)days,and with one to two parities were randomly divided into three groups.The experiment duration was 56 days,the pretest duration was 14 days,and the trial period duration was 42 days.Ewes were fed diets meeting 80%,100%,or 120%of their nutritional requirements.The effects of these different nutrient levels on ewe weight loss,lamb weight gain,milk yield,nutrient intake,and nutrient digestion and use were determined.The results showed that with the increase in nutrition level,the weight loss of the lactating ewe decreased(P<0.05)and the lamb weight gain increased(P<0.05);the milk yield of the ewes increased with the increase in nutrient level(P<0.05),and the milk fat percentage,milk protein,and lactose contents increased(P<0.05).Dietary dry matter,organic matter,gross energy,crude protein,neutral detergent fiber,calcium,and phosphorus intake and digestibility increased with the increase in nutrient level(P<0.05).In conclusion,improving nutrition level can increase ewe lactation,reduce ewe weight loss,increase nutrient intake,improve nutrient digestion and absorption,and promote the lamb growth.The optimum nutritional level for lactating Qianbei Brown ewes is 120%of the nutritional requirements of“Feeding Standard of Meat-producing Sheep and Goats”.
作者
翁吉梅
孙澄慧
许天政
艾锦新
蔡惠芬
施晓丽
WENG Jimei;SUN Chenghui;XU Tianzheng;AI Jinxin;CAI Huifen;SHI Xiaoli(College of Animal Science,Guizhou University,Guiyang 550000,Guizhou,China;Guizhou Station of Livestock and Poultry Genetic Resources Management,Guiyang 550001,Guizhou,China;Agriculture and Rural Bureau of Shui Autonomous County,Sandu,Sandu 558100,Guizhou,China)
出处
《草业科学》
CAS
CSCD
北大核心
2023年第10期2693-2701,共9页
Pratacultural Science
基金
贵州省科技支撑资助项目(黔科合支撑[2014]3046)
无公害饲料添加剂研制与产业化示范项目(黔科合NY[2007]3006)
放牧山羊的补饲技术研究项目(Z073150)
贵州省肉羊技术体系项目(2022年)。
关键词
泌乳期
营养需要
母羊失重
羔羊增重
消化率
lactation period
nutritional requirement
ewe weight loss
lamb weight gain
digestibility
