瘤胃保护型亮氨酸对滩羊母羊繁殖性能、消化性能及初乳品质的影响

本试验旨在探讨瘤胃保护型亮氨酸(RP-Leu)对滩羊母羊繁殖性能、消化性能及初乳品质的影响。选取体重为(42.18±2.62)kg的经产滩羊母羊48只,随机分为4组,每组3个重复,每个重复4只。对照组饲喂基础饲粮,试验组在对照组基础上分别添加0.10%、0.20%和0.30%的RP-Leu。试验期为妊娠后第35天始至分娩后第60天(断奶)结束。结果表明:与对照组相比,妊娠期母羊饲粮添加0.20%RP-Leu显著提高了羔羊初生重和断奶重(P0.05),显著提高了妊娠期母羊粗蛋白质的表观消化率(P0.05),显著提高了初乳中乳脂、乳蛋白和乳糖含量(P0.05),同时显著降低了母羊分娩后第15天血清尿素氮含量(P0.05)。综上所述,饲粮中添加0.20%RP-Leu能够改善妊娠滩羊氮沉积和初乳品质,同时实现促进羔羊生长发育的目的。

Effects of Rumen Protected Leucine on Reproductive Performance,Digestion Performance and Colostrums Quality of Ewes of Tan Sheep

The objective of the present experiment was to determine the effects of rumen protected leucine ( RP-Leu) on reproductive performance, digestion performance and colostrums quality of ewes of Tan sheep. Forty-eight multiparity ewes of Tan sheep with an average body weight of (42.18±2.62) kg were randomly as-signed into 4 groups ( 3 replicates per group, and 4 ewes per replicate) .Control group used a basal diet, and experimental groups were supplemented 0, 0.10% , 0.20% and 0.30% RP-Leu based on control group, respec-tively.The trial began at 35 d after conception and ended at 60 d ( weaning) after parturition.The results showed as follows:compared with control group, the supplementation of 0.20% RP-Leu in diet for pregnant e-wes significantly increased birth weight and weaner weight of their lambs (P<0.05), significantly increased the apparent digestibility of crude protein of pregnant ewes of Tan sheep ( P<0.05) , significantly increased the contents of milk fat, milk protein and lactose of colostrums ( P<0.05) , and significantly decreased the content of serum urea nitrogen of ewes at 15 d after parturition (P<0.05).In conclusion, dietary supplementation of RP-Leu can improve nitrogen deposition and colostrums quality of ewes of Tan sheep, and improve growth and development of their lambs.