Effects of Dietary Methionine Level on Reproductive Performance of Blue Foxes (Alopex lagopus) in Reproductive Period

GUO Jungang; ZHANG Tietao; WU Xuezhuang; LIU Zhi; GAO Xiuhua; YANG Fuhe; XING Xiumei; YUE Zhigang

doi:10.3969/j.issn.1006-267x.2015.01.020

Chinese Journal of Animal Nutrition >

2015 , Vol. 27 >Issue 1: 165 - 170

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.01.020

Special Economic Animal Nutrition

Effects of Dietary Methionine Level on Reproductive Performance of Blue Foxes (Alopex lagopus) in Reproductive Period

GUO Jungang ,
ZHANG Tietao ,
WU Xuezhuang ,
LIU Zhi ,
GAO Xiuhua ,
YANG Fuhe ,
XING Xiumei ,
YUE Zhigang

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1. Institute of Feed Research, Chinese Academy of Agriculture Sciences, Beijing 100081, China;
2. Stake Key Laboratory of Special Animal Molecular Biology, Institute of Economic Animal and Plant Science, Chinese Academy of Agriculture Sciences, Changchun 130112, China

Received date: 2014-08-22

Online published: 2015-01-10

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Abstract

This experiment was conducted to study the effects of dietary methionine level on reproductive performance of blue foxes (Alopex lagopus) in reproductive period. One hundred and fifty healthy female blue foxes were randomly assigned into 5 groups with 30 replicates per group and 1 fox per replicate. The blue foxes in groups Ⅰ, Ⅱ, Ⅲ, Ⅳ and Ⅴ were fed a basal diet supplemented with 0.20%, 0.45%, 0.70%, 0.95% and 1.20% methionine, respectively. The formal test lasted from February 10th 2014 to May 25th 2014. The results showed as follows: the beginning of oestrus time of blue foxes in the groups Ⅱ, Ⅲ and Ⅳ was advanced, and ended earlier. The beginning of oestrus time in the groups Ⅰ and Ⅴ was later. The highest values of breeding rate and conception rate were all found in the group Ⅱ, and the breeding rate in the group Ⅱ was 17%, 3%, 10% and 14% higher than that in the groups Ⅰ, Ⅲ, Ⅳ and Ⅴ, respectively. The differences in little size and birth weight among groups were not significant (P>0.05). The litter weight at birth showed a trend of decrease after the first increase as the dietary methionine level increasing, and the litter weight at birth in the groups Ⅰ and Ⅱ was significantly higher than that in the group Ⅴ (P<0.05). The survival rate in the group Ⅱ was significantly higher than that in the group Ⅴ (P<0.01). In conclusion, when the diet supplemented with 0.45% methionine, which the methionine level in the diet is 0.98%, can meet the need of blue foxes in reproductive period.

Key words： methionine; reproductive period; blue fox; oestrus time; reproductive performance

Cite this article

GUO Jungang , ZHANG Tietao , WU Xuezhuang , LIU Zhi , GAO Xiuhua , YANG Fuhe , XING Xiumei , YUE Zhigang . Effects of Dietary Methionine Level on Reproductive Performance of Blue Foxes (Alopex lagopus) in Reproductive Period[J]. Chinese Journal of Animal Nutrition, 2015 , 27(1) : 165 -170 . DOI: 10.3969/j.issn.1006-267x.2015.01.020

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