Effects of Supplementary Feeding on Growth Performance, Body Size Indexes and Serum Antioxidant, Biochemical Indexes of Grazing Cows during Growing Period

CHEN Hao; WANG Chunjie; Simujide; ZHANG Chen; CAO Jiaming; WU Sitong; XU Ping; LIU Feihong; Aorigele

doi:10.3969/j.issn.1006-267x.2020.11.031

2020 , Vol. 32 >Issue 11: 5267 - 5274

DOI: https://doi.org/10.3969/j.issn.1006-267x.2020.11.031

Effects of Supplementary Feeding on Growth Performance, Body Size Indexes and Serum Antioxidant, Biochemical Indexes of Grazing Cows during Growing Period

CHEN Hao ,
WANG Chunjie ,
Simujide ,
ZHANG Chen ,
CAO Jiaming ,
WU Sitong ,
XU Ping ,
LIU Feihong ,
Aorigele

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1. College of Animal Science, Inner Mongolia Agricultural University, Hohhot 010018, China;
2. College of Veterinary Medicine, Inner Mongolia Agricultural University, Hohhot 010018, China

Received date: 2020-04-05

Online published: 2020-11-16

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Abstract

The purpose of this experiment was to study the effects of supplementary feeding on growth performance, body size indexes and serum antioxidant, biochemical indexes of grazing cows during growing period. Twenty four 7-months-old healthy Simmental cows during growing period with an average body weight of (211.65±4.25) kg were randomly divided into two groups, each group contained 12 cows. Cows in grazing group were natural grazing in native pasture; cows in supplementary feeding group were natural grazing with concentrate supplementation, the concentrate supplementary amount was 1.2 kg/d per cow during days 1 to 30, and 1.6 kg/d per cow during days 31 to 60. The pre-experimental period lasted for 8 days, and the experimental period lasted for 60 days. The results showed as follows: 1) on day 60, the body weight, average daily gain and body height of supplementary feeding group were significantly higher than those of grazing group (P<0.05). 2) Compared with day 1, the serum superoxide dismutase (SOD) activity of grazing group on day 60 was significantly increased (P<0.05), and the malondialdehyde (MDA) content, total antioxidant capacity (T-AOC) and glutathione peroxidase (GSH-Px) activity in serum were no significant difference (P>0.05). Compared with day 1, the serum MDA content of supplementary feeding group on day 60 was significantly decreased (P<0.05), and the T-AOC and GSH-Px, SOD activities in serum were significantly increased (P<0.05). On day 60, the T-AOC and GSH-Px, SOD activities in serum of supplementary feeding group were significantly higher than those of grazing group (P<0.05), and the serum MDA content was significantly lower than that of grazing group (P<0.05). 3) Compared with day 1, the contents of thyroid hormone (T₄), glucose (GLU), growth hormone (GH), insulin-like growth factor-1 (IGF-1) and insulin (INS) in serum of supplementary feeding group on day 60 was significantly increased (P<0.05). On day 60, the contents of T₄, GLU, GH and IGF-1 in serum of supplementary feeding group were significantly higher than those of grazing group (P<0.05). In conclusion, the supplement of concentrate can enhance the antioxidant ability and immune function of breeding cattle under grazing condition, increase the contents of growth related hormones in serum, and effectively promote the growth and development of breeding cattle.

Key words： breeding cattle; supplementary feeding; antioxidant ability; body size; growth

Cite this article

CHEN Hao , WANG Chunjie , Simujide , ZHANG Chen , CAO Jiaming , WU Sitong , XU Ping , LIU Feihong , Aorigele . Effects of Supplementary Feeding on Growth Performance, Body Size Indexes and Serum Antioxidant, Biochemical Indexes of Grazing Cows during Growing Period[J]. Chinese Journal of Animal Nutrition, 2020 , 32(11) : 5267 -5274 . DOI: 10.3969/j.issn.1006-267x.2020.11.031

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