摘要
试验旨在探究不同粗蛋白(CP)水平饲粮对泌乳期阿拉善双峰驼生产性能、养分表观消化率及血清生化指标的影响。试验选取健康、6~10岁、产奶量(1.62±0.41) kg的泌乳期阿拉善双峰驼20峰,随机分为5组,每组4个重复,每个重复1峰骆驼。P1组、P2组、P3组、P4组和P5组分别饲喂CP水平为12.26%、14.34%、17.99%、19.12%和21.94%的全价颗粒饲粮。预试期7 d,正式试验期7 d。结果显示:随着饲粮CP水平增加,干物质采食量显著提高(P<0.05);P5组阿拉善双峰驼产奶量和干物质(DM)表观消化率显著低于其他组(P<0.05)。随着饲粮CP水平提高,P1~P4组CP表观消化率呈上升趋势,P5组显著低于P4组(P<0.05);粗脂肪(EE)表观消化率呈先上升后下降趋势,P3组最高,显著高于P1组和P5组(P<0.05);P3组和P5组酸性洗涤纤维(ADF)表观消化率显著低于其他组(P<0.05),P5组总能表观消化率显著低于P2~P4组(P<0.05)。不同CP水平饲粮对阿拉善双峰驼奶品质和血清生化指标无显著影响(P>0.05)。研究表明,饲粮CP超过19.12%会降低泌乳期阿拉善双峰驼DM、CP、EE、ADF、总能的表观消化率和产奶量,饲粮CP在17.99%~19.12%之间短时间内利于阿拉善双峰驼对蛋白质的吸收利用。
The study aimed to investigate the effects of different dietary crude protein(CP)levels on the production performance,nutrient apparent digestibility,and serum biochemical indexes of lactating Alashan Bactrian camels.Twenty healthy,six to ten year old lactating Alashan Bactrian camels with similar milk yields(1.62±0.41)kg were randomly divided into five groups,with four replicates per group,and one camel per replicate.The camels in P1,P2,P3,P4 and P5 groups were fed the total mixed pellet feed with CP level of 12.26%,14.34%,17.99%,19.12%and 21.94%,respectively.The pre-test lasted for seven days and the formal experiment lasted for seven days.The results showed that dry matter intake significantly increased with increasing dietary CP(P<0.05).The milk yield and apparent digestibility of dry matter(DM)in the P5 group were significantly lower than in other groups(P<0.05).The apparent digestibility of CP in P1 to P4 groups increased with increasing dietary CP content,while the P5 group was significantly lower than the P4 group(P<0.05).The apparent digestibility of ether extract(EE)showed an upward trend initially and then declined,with the highest value in the P3 group,which was significantly higher than the P1 and P5 groups(P<0.05).The apparent digestibility of acid detergent fiber(ADF)in the P3 and P5 groups was significantly lower than in other groups(P<0.05).The apparent digestibility of total energy in the P5 group was significantly lower than that in P2 to P4 groups(P<0.05).Different dietary CP levels had no significant effect on milk quality or serum biochemical indexes of Alashan Bactrian camels(P>0.05).The study show that dietary CP levels exceed 19.12%reduce the apparent digestibility of DM,CP,EE,ADF,and total energy,as well as milk yield in lactating Alashan Bactrian camels.Dietary CP levels between 17.99%and 19.12%is optimal for protein absorption and utilization in the short term in Alashan Bactrian camels.
作者
焦兴刚
张辉
王雨昕
王筱珊
照日格图
吴芳
JIAO Xinggang;ZHANG Hui;WANG Yuxin;WANG Xiaoshan;ZHAO Rigetu;WU Fang
出处
《饲料研究》
北大核心
2025年第2期37-41,共5页
Feed Research
基金
内蒙古自治区科技计划(项目编号:2021GG0390)。
关键词
阿拉善双峰驼
驼奶
养分表观消化率
血清指标
Alashan Bactrian camels
camel milk
nutrient apparent digestibility
serum indexes
