动物营养学报2025，Vol.37Issue(3)：1893-1903,11.DOI:10.12418/CJAN2025.160
棉籽壳饲粮对卡拉库尔羊与湖羊生长性能、营养物质表观消化率、氮代谢以及反刍行为的影响
Effects of Cottonseed Hull Diet on Growth Performance,Nutrient Apparent Digestibility,Nitrogen Metabolism and Ruminant Behavior of Karakul Sheep and Hu Sheep
摘要
Abstract
This experiment aimed to investigate the differences in growth performance,nutrient apparent di-gestibility,nitrogen metabolism and ruminant behavior between Karakul sheep and Hu sheep under the same feeding conditions,so as to provide basic data for the accurate feeding and management of lambs of the two breeds.Eighteen weaned lambs of Karakul sheep and Hu sheep,each with close weight at 15 days of age,were fed with cottonseed hull diet instead of basal diet until 30 days of age,with the replacement amount in-creased by 6%of the previous day's feeding amount,and then completely fed with cottonseed hull diet at 45 days of age.Six lambs were selected from each group at 30,90 and 150 days of age for a 5-day digestion and metabolism experiment.The results showed as follows:1)the retention nitrogen,the utilization rate of nitro-gen and the biological value of nitrogen of Karakul sheep at 30 days of age were significantly higher than those of Hu sheep(P＜0.05),whereas the urinary nitrogen and total excreted nitrogen were significantly lower than those of Hu sheep(P＜0.05).2)The average daily gain and net gain of Karakul sheep at 31 to 90 days of age were significantly higher than those of Hu sheep(P＜0.05),and dry matter intake were extremely significantly higher than that of Hu sheep(P＜0.01);whereas,the apparent digestibility of dry matter and neutral detergent fiber was significantly higher than that of Hu sheep at 90 days of age(P＜0.05);moreover,the total rumina-tion number,total rumination time and rumination time at night of Karakul sheep at 90 days of age were ex-tremely significantly higher than those of Hu sheep(P＜0.01).The body weight of Karakul sheep at 150 days of age was extremely significantly higher than that of Hu sheep(P＜0.01),while the intake nitrogen was ex-tremely significantly lower than that of Hu sheep(P＜0.01).In summary,Karakul sheep can adapt more rapid-ly to changes in diet composition and structure than Hu sheep,and this adaptation is reflected in the fact that feeding cottonseed hulls diet shows better growth performance in the short term and presents higher apparent di-gestibility of neutral detergent fiber as well as more rumination number and longer rumination time.[Chinese Journal of Animal Nutrition,2025,37(3):1893-1903]关键词
棉籽壳/卡拉库尔羊/湖羊/生长性能/营养物质表观消化率/氮代谢/反刍行为Key words
cottonseed hulls/Karakul sheep/Hu sheep/growth performance/nutrient apparent digestibility/nitrogen metabolism/rumination behavior分类
农业科技引用本文复制引用
俄广旭,王继姝,黄丹,顾皓斐,张延龙,白天天,普宣宣,杨风萍,郭雪峰..棉籽壳饲粮对卡拉库尔羊与湖羊生长性能、营养物质表观消化率、氮代谢以及反刍行为的影响[J].动物营养学报,2025,37(3):1893-1903,11.基金项目
国家自然科学基金项目(32260845) （32260845）
