Effects of &beta;-Carotene on Performance, Antioxidant Function, Blood Physiological Indices and Meat Quality of Beef Cattle

BI Yulin; WAN Fachun; JIANG Shuzhen; LIU Xiaomu; YANG Zaibin

doi:10.3969/j.issn.1006-267x.2014.05.011

Chinese Journal of Animal Nutrition >

2014 , Vol. 26 >Issue 5: 1214 - 1220

DOI: https://doi.org/10.3969/j.issn.1006-267x.2014.05.011

Ruminant Nutrition

Effects of β-Carotene on Performance, Antioxidant Function, Blood Physiological Indices and Meat Quality of Beef Cattle

BI Yulin ,
WAN Fachun ,
JIANG Shuzhen ,
LIU Xiaomu ,
YANG Zaibin

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1. College of Animal Science and Technology, Shandong Agricultural University, Tai'an 271018 China;
2. Shandong Key Lab of Animal Disease Control and Breeding, Ji'nan 250100, China;
3. Institute of Animal Science and Veterinary Medicine, Shandong Academy of Agricultural Sciences, Ji'nan 250100, China

Received date: 2013-11-11

Online published: 2014-05-05

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Abstract

This experiment was conducted to investigate the effects of dietary supplementation of different levels of β-carotene on performance, antioxidant function, blood physiological indices and meat quality of beef cattle. One hundred and twenty healthy Simmental crossbred bullocks with similar weight of (381.00±26.01) kg were randomly divided into four groups with 30 bullocks in each group. Beef cattle in control group were fed a basal diet, and those in experimental groups were fed the basal diet supplemented with 600, 1 200 and 1 800 mg/d β-carotene, respectively, during 10 days of pre-experiment and 90 days of formal experiment. The results showed as follows: 1) no significant differences in final weight, average daily gain and dry matter intake were found in beef cattle received different dietary supplemental levels of β-carotene (P>0.05). 2) Compared with control group, serum glutathione (GSH) content and total superoxide dismutase (T-SOD) activity in 1 200 mg/d β-carotene experimental group were significantly increased (P<0.05), however, serum malondialdehyde (MDA) content was significantly decreased (P<0.05); serum total antioxidant capacity (T-AOC) in 1 800 mg/d β-carotene experimental group was significantly increased (P<0.05). Significant linear and quadratic changes were found in serum T-AOC, GSH content, T-SOD activity and MDA content with the increase of dietary β-carotene supplemental level (P<0.05). 3) Compared with control group, blood middle cell (MID) count and percentage in 600 mg/d β-carotene experimental group were significantly decreased (P<0.05), while blood neutrophile granulocyte (GRAN) percentage was significantly increased in 1 800 mg/d β-carotene experimental group (P<0.05); with the increase of dietary β-carotene supplemental level, significant linear and quadratic changes were found in blood MID count and percentage (P<0.05), and significant linear changes were found in blood GRAN percentage, white blood cell (WBC) count and lymphocyte (LYM) count (P<0.05). 4) Compared with control group, b^* value of meat colour in 1 200 mg/d β-carotene experimental group was significantly decreased (P<0.05); with the increase of dietary β-carotene supplemental level, L^* value of meat colour tended to be linearly decreased (P=0.079); no significant differences were found in crude protein, ether extract, moisture and ash contents in beef and meat color in beef cattle received different dietary supplemental levels of β-carotene (P>0.05). In conclusion, dietary supplementation of β-carotene can significantly affect antioxidant function, blood physiological indices and meat quality of beef cattle, and the optimal supplemental level is 1 200 mg/d under conditions in the present study.

Key words： β-carotene; performance; antioxidant function; blood physiological indices; meat quality

Cite this article

BI Yulin , WAN Fachun , JIANG Shuzhen , LIU Xiaomu , YANG Zaibin . Effects of β-Carotene on Performance, Antioxidant Function, Blood Physiological Indices and Meat Quality of Beef Cattle[J]. Chinese Journal of Animal Nutrition, 2014 , 26(5) : 1214 -1220 . DOI: 10.3969/j.issn.1006-267x.2014.05.011

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