摘要
本试验旨在研究冷应激对羔羊生长性能、营养物质表观消化率和血液指标的影响。选择健康、体重相近的5月龄羔羊(澳洲白羊×小尾寒羊)18只,随机分为3组,即对照组、冷应激组和采食配对组(人为控制该组采食量与对照组一致),每组6只羊,试验期28 d。结果表明:1)与对照组相比,冷应激显著降低羔羊直肠温度和呼吸频率(P<0.05)。2)冷应激组的平均日采食量(ADFI)极显著高于对照组(P<0.01);试验第26~28天采食配对组的粗蛋白质(CP)表观消化率显著低于冷应激组(P<0.05),粗脂肪(EE)表观消化率显著低于对照组和冷应激组(P<0.05);冷应激组和采食配对组的中性洗涤纤维(NDF)表观消化率都显著低于对照组(P<0.05);冷应激下控制采食量有降低羔羊干物质(DM)表观消化率的趋势(P=0.091)。3)采食配对组的血红蛋白含量极显著高于对照组和冷应激组(P<0.01);冷应激组血清白蛋白(ALB)含量极显著高于对照组(P<0.01);采食配对组血清葡萄糖(GLU)含量极显著低于对照组(P<0.01);冷应激组和采食配对组血清非酯化脂肪酸(NEFA)含量极显著高于对照组(P<0.01)。由此可见,冷应激能够提高绵羊的采食量,降低其营养物质的表观消化率、呼吸频率和直肠温度,并对血细胞及血清生化指标产生调节作用;此外,采食量的变化也会对营养物质的表观消化率、血细胞以及血清生化指标产生影响。
This present study was conducted to investigate the effects of cold stress on growth performance,nutrient apparent digestibility and blood indices in lambs.Eighteen 5-month-old lambs(Australian white×small tail Han sheep)with similar body weights were selected and randomly divided into three groups(control group,cold stress group,and feeding-paired group,where the feeding-paired group was controlled to be the same as the control group)using a completely randomized design.Each group consisted of 6 lambs,and the experiment lasted for 28 days.The results showed as follows:1)compared with the control group,cold stress significantly reduced the rectal temperature and respiratory rate of lambs(P<0.05).2)The average daily feed intake(ADFI)of the cold stress group was significantly higher than that of the control group(P<0.01);the apparent digestibility of crude protein in the feeding-paired group was significantly lower than that in cold stress group at days 26 to 28(P<0.05);the apparent digestibility of ether extract in the feeding-paired group was significantly lower than that in both the control and cold stress groups(P<0.05);the apparent digestibility of neutral detergent fiber(NDF)in the cold stress and feeding-paired groups was significantly lower than that in the control group(P<0.05);controlling feed intake under cold stress tended to reduce the apparent digestibility of dry matter in lambs(P=0.091).3)The hemoglobin content in the feeding-paired group was significantly higher than that in the control and cold stress groups(P<0.01);the serum albumin content was significantly higher than that in the control group(P<0.01);the serum glucose content in the feeding-paired group was significantly lower than that in control group(P<0.01);the serum non-esterified fatty acid content in both the cold stress and feeding-paired groups was significantly higher than that in control group(P<0.01).In conclusion,cold stress increases the feed intake of sheep,while reducing the apparent digestibility of nutrients,respiratory rate,and rectal temperature,as well as regulating blood cells and serum biochemical indices.Additionally,changes in feed intake also affect the apparent digestibility of nutrients,blood cells,and serum biochemical indices.[Chinese Journal of Animal Nutrition,2025,37(6):3945-3956]
作者
姜敏
张学凯
陈纪薇
金晓
徐元庆
王哲奇
JIANG Min;ZHANG Xuekai;CHEN Jiwei;JIN Xiao;XU Yuanqing;WANG Zheqi(College of Animal Science,Inner Mongolia Agricultural University,Hohhot 010018,China;Institute of Grassland Research of Chinese Academy of Agricultural Sciences,Hohhot 010010,China)
出处
《动物营养学报》
北大核心
2025年第6期3945-3956,共12页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
内蒙古自治区自然科学基金(2022QN03005)
内蒙古自治区直属高校基本科研业务费项目(BR220135)
中国农业科学院草原研究所基本科研业务费专项(1610332022008)
内蒙古自治区一流学科科研专项(YLXKZX-NND-043)
内蒙古农业大学动物科学学院高水平成果培育专项(QT202214)。
关键词
羔羊
冷应激
血细胞
血清生化指标
表观消化率
lambs
cold stress
blood cells
serum biochemical indices
apparent digestibility
作者简介
姜敏(2000-),女,四川内江人,硕士研究生,从事动物环境与营养研究。E-mail:jiangmin080808@163.com;通信作者:徐元庆,副教授,硕士生导师,E-mail:xuyuanqing@imau.edu.cn;通信作者:王哲奇,副研究员,E-mail:wangzheqi@caas.cn。
