Effects of Gender on Growth Performance, Nutrient Apparent Digestibility and Slaughter Performance of House-Feeding Yaks

ZENG Yu, PNEG Zhongli, GAO Yanhua, FU Yangyang, MIAO Jianjun, WANG Ding, GUO Chunhua

doi:10.3969/j.issn.1006-267x.2019.03.022

2019 , Vol. 31 >Issue 3: 1171 - 1178

DOI: https://doi.org/10.3969/j.issn.1006-267x.2019.03.022

Molecular Nutrition

Effects of Gender on Growth Performance, Nutrient Apparent Digestibility and Slaughter Performance of House-Feeding Yaks

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1. College of Life Science and Technology, Southwest Minzu University, Chengdu 610041, China;
2. Key Laboratory of Animal Science of State Ethnic Affairs Commission, Chengdu 610041, China;
3. Key Laboratory of Qinghai-Tibetan Plateau Animal Genetic Resource Conservation and Utilization, Chengdu 610041, China

Received date: 2018-08-21

Online published: 2019-03-18

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Abstract

The objective of this experiment was to investigate the effects of gender on growth performance, nutrient apparent digestibility and slaughter performance of house-feeding yaks. Twelve healthy Maiwa yaks with 2.5 years of age and an initial body weight of (150.30±9.27) kg were divided into 2 groups with 6 yaks per group based on gender. All yaks were reared and finished under an identical management condition. The pre-test period lasted for 14 days and the trial lasted for 168 days. The result showed as follows:1)during the whole period of house-feeding, the average daily feed intake of the male yaks group was higher than that of the female yaks group, the average daily feed intake of the male yaks group was significantly higher than that of the female yaks group in the 19th week (P<0.05), and other weeks were not found significant difference (P>0.05). The final body weight and average daily gain of the male yaks group were significantly higher than those of the female yaks group (P<0.05), and the feed/gain had a low tendency than the female yaks group (P=0.080). 2)Compared with the male yaks group,only a higher apparent digestibility of organic matter was found in the female yaks group (P<0.05), while the other nutrient apparent digestibility had no significant difference between groups (P>0.05). 3)Compared with the female yaks group, pre-slaughter live weight of male yaks group was significantly increased (P<0.05), the carcass weight and the net meat weight were tended to be higher than those of the female yaks group (P=0.078,P=0.058), but the net meat ratio and the slaughter ratio were significantly reduced (P<0.05), Other indicators were found no significant different between groups (P>0.05). In conclusion,under the same management conditions, the female yaks have better slaughter performance and higher apparent digestibility of organic matter, while the male yaks have better growth performance.

Key words： house-feeding yaks; gender; growth performance; apparent digestibility; slaughter performance

Cite this article

ZENG Yu, PNEG Zhongli, GAO Yanhua, FU Yangyang, MIAO Jianjun, WANG Ding, GUO Chunhua . Effects of Gender on Growth Performance, Nutrient Apparent Digestibility and Slaughter Performance of House-Feeding Yaks[J]. Chinese Journal of Animal Nutrition, 2019 , 31(3) : 1171 -1178 . DOI: 10.3969/j.issn.1006-267x.2019.03.022

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