隔栏补饲时间对杜湖杂交羔羊生长性能、羊毛品质和血清生化指标的影响

doi:10.16431/j.cnki.1671-7236.2021.10.015

Abstract

Abstract: In order to determine the best supplementary feeding time by fence for lambs, the growth performance, wool quality and serum biochemical indexs of Dorper×Hu sheep hybrid lambs with different supplementary feeding time were tested. 180 healthy male lambs with uniform body weight and similar body conditions were selected and divided into 3 groups with 60 lambs in each group. Each group started supplementary feeding by fence at 15-day-old and ended at 40-day-old. The time of supplementary feeding by fence was 6 h per day for lambs in group Ⅰ and the time of group Ⅱ was transitioned from 6 to 10 h and from 6 to 12 h in group Ⅲ. Lambs were weighed at the beginning and ending of the experiment to determine their growth performance, at the end of the experiment, wool and blood samples were collected to determine wool quality and serum biochemical indexes. The results showed that with the prolongation of supplementary feeding time by fence, the average daily gain of lambs increased gradually, the feed intake decreased, and the ratio of feed to gain decreased, but there was no significant difference between groups (P>0.05). There were significant differences in the proportion of medullated and non medullated wool in lamb lateral wool among different groups (P<0.05). For proportion of medullated hairs, group Ⅰ>group Ⅱ>group Ⅲ, while for percentage of unmyelinated hairs, group Ⅲ>group Ⅱ>group Ⅰ, and the proportion of unmyelinated hair increased with the prolongation of supplementary feeding time by fence. There was no significant difference in other wool indexes among groups (P>0.05). The content of serum triglyceride in groups Ⅱ and Ⅲ was significantly higher than that in group Ⅰ(P<0.05), the content of serum albumin in groups Ⅰ and Ⅱ was significantly higher than that in group Ⅲ (P<0.05), the content of creatinine in group Ⅱ was significantly higher than that in group Ⅲ (P<0.05), and the content of creatine kinase in group Ⅱ was significantly higher than that in groups Ⅰ and Ⅲ (P<0.05). In conclusion, when lambs were gradually isolated from their mothers from 15 to 40 days of age, The growth performance of lambs was improved with the extension of feeding time. The results showed that group Ⅲ, which had the longest feeding time, had the best performance in average daily gain, feed to weight ratio and wool quality.

Key words: supplementary feeding by fence; Dorper×Hu sheep hybrid lambs; growth performance; wool quality; serum biochemical index

CLC Number:

S815.4

YANG Jiangfeng, BAI Yuanyuan, ZHAO Xiaokun, YU Xiaojie, LI Zhanli, ZHANG Lei, WANG Jing. Effects of Supplementary Feeding Time by Fence on Growth Performance, Wool Quality and Serum Biochemical Indices of Dorper×Hu Sheep Hybrid Lambs[J]. China Animal Husbandry and Veterinary Medicine, 2021, 48(10): 3644-3651.

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Effects of Supplementary Feeding Time by Fence on Growth Performance, Wool Quality and Serum Biochemical Indices of Dorper×Hu Sheep Hybrid Lambs

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