Effects of Dietary Energy Level on Reproductive Performance, Body Weight Change and Serum Biochemical Indices of Rex Rabbits Used 42-Day Reproduction System

SUN Liangzhan, LI Jinglin, SUN Chaoran, LI Fuchang

doi:10.3969/j.issn.1006-267x.2014.09.026

2014 , Vol. 26 >Issue 9: 2645 - 2651

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.09.026

Ruminants and Herbivorous Animal Nutrition

Effects of Dietary Energy Level on Reproductive Performance, Body Weight Change and Serum Biochemical Indices of Rex Rabbits Used 42-Day Reproduction System

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College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018, China

Received date: 2014-04-14

Online published: 2014-09-10

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Abstract

This experiment was conducted to investigate the effects of dietary energy level on reproductive performance, body weight change and serum biochemical indices of Rex rabbits used 42-day reproduction system. A total of 150 multiparous Rex rabbits with an average body weight of (3.56±0.17) kg were randomly divided into 3 groups with 40 replicates per group and 1 rabbit per replicate. A 42-day production system was used and Rex rabbits in the 3 groups were fed experimental diets containing 9.2, 9.7 and 10.2 MJ/kg digestible energy, respectively. Three gestations were recorded in this study. The results showed as follows: 1) the lactation capability (P=0.006 2), body weight of postpartum after the first gestation (P=0.002 1) and weaning litter weight (P=0.000 6) were significantly affected by dietary energy level. Body weight of 21st-d of gestation of the first(P=0.047 5) and third (P=0.030 2) gestation were significantly affected by dietary energy level. The body weight at the 21st day of lactation period after the first and third gestation were significantly affected by dietary energy level (P=0.047 5 and P=0.030 2). 2) The creatine kinase activity (P=0.001 5) and triglyceride(P=0.001 3) content in serum were significantly affected by dietary energy level. The contents of high density lipoprotein cholesterol (P=0.036 8), total cholesterol (P=0.047 6) and insulin (P=0.015 9) in serum were significantly affected by dietary energy level, while the other serum biochemical indices were not affected by dietary energy level (P>0.05). In conclusion, the suitable digestible energy level is 10.2 MJ/kg for Rex rabbits used 42-day production system.

Key words： energy level; Rex rabbit; reproductive performance; body weight; serum biochemical indices

Cite this article

SUN Liangzhan, LI Jinglin, SUN Chaoran, LI Fuchang . Effects of Dietary Energy Level on Reproductive Performance, Body Weight Change and Serum Biochemical Indices of Rex Rabbits Used 42-Day Reproduction System[J]. Chinese Journal of Animal Nutrition, 2014 , 26(9) : 2645 -2651 . DOI: 10.3969/j.issn.1006-267x.2014.09.026

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