RESEARCH PAPER

Effects of β-Carotene on Growth Performance, Antioxidant Capacity, Reproductive Hormone Indices and Follicle Development of Female Rabbits

  • SUN Lei ,
  • WEI Yuchao ,
  • LIU Fuxin ,
  • CHEN Baojiang ,
  • WANG Zhigang
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  • 1. College of Animal Science and Technology, Hebei Agricultural University, Baoding 071000, China;
    2. Cattle and Sheep Embryo Technology Innovation Center of Hebei Province, Baoding 071000, China

Received date: 2021-08-21

  Online published: 2022-03-14

Abstract

This experiment was conducted to investigate the effects of dietary different supplemental levels of β-carotene on growth performance, antioxidant capacity, reproductive hormone indices and follicle development of female rabbits. A total of 160 healthy 55 to 60-day-old female rabbits with similar body weight[(1.679±0.114) kg] were randomly divided into 4 groups with 20 replicates per group and 2 rabbits per replicate. Broilers in the control group were fed a basal diet, and broilers in experimental groups were fed the basal diets supplemented with 15, 30 and 45 mg/kg β-carotene, respectively. The pretrial period lasted for 7 days, and the formal period lasted for 84 days. The results showed as follows:1) dietary different supplemental levels of β-carotene had no significant effects on final body weight, total weight gain, average daily gain, average daily feed intake and feed to gain ratio of female rabbits (P>0.05). 2) Compared with the control group, dietary supplemented with 45 mg/kg β-carotene significantly decreased the serum superoxide dismutase (SOD) activity (P<0.05). 3) Compared with the control group, dietary supplemented with 30 mg/kg β-carotene significantly decreased the contents of follicle stimulating hormone (FSH) and progesterone (PROG) in serum at 70 days (P<0.05). Compared with the control group, dietary supplemented with 30 mg/kg β-carotene significantly increased the content of estradiol (E2) in ovarian (P<0.05), dietary supplemented with 15 mg/kg β-carotene significantly decreased the content of PROG in ovarian (P<0.05). 4) Compared with the control group, dietary supplemented with 45 mg/kg β-carotene significantly increased the proportion of primary follicles of female rabbits (P<0.05). In conclusion, dietary β-carotene supplementation can improve the antioxidant capacity of female rabbits, promote the follicular development and reproductive hormone secretion, however, high dose will reduce the antioxidant capacity of female rabbits. Under this experimental conditions, the dietary optimal supplemental level of β-carotene is 30 mg/kg.

Cite this article

SUN Lei , WEI Yuchao , LIU Fuxin , CHEN Baojiang , WANG Zhigang . Effects of β-Carotene on Growth Performance, Antioxidant Capacity, Reproductive Hormone Indices and Follicle Development of Female Rabbits[J]. Chinese Journal of Animal Nutrition, 2022 , 34(3) : 1885 -1894 . DOI: 10.3969/j.issn.1006-267x.2022.03.048

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