Molecular Nutrition

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

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  • 1. Departments of Animal Science, Ningxia University, Yinchuan 750021, China;
    2. Hongsipu District Tianyuan Well-Bred Sheep Breeding Co., Ltd., Wuzhong 751900, China;
    3. Ningxia Hui Autonomous Region Husbandry Workstation, Yinchuan 750001, China

Received date: 2017-08-07

  Online published: 2017-12-04

Abstract

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 assigned 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, respectively. 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 ewes 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.

Cite this article

ZHANG Guijie, KOU Qifang, NIU Wenzhi, CAO Siyi . Effects of Rumen Protected Leucine on Reproductive Performance, Digestion Performance and Colostrums Quality of Ewes of Tan Sheep[J]. Chinese Journal of Animal Nutrition, 2017 , 29(12) : 4349 -4354 . DOI: 10.3969/j.issn.1006-267x.2017.12.015

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