Effects of Different Chemical Forms of Trace Element on Milk Performance and Serum Parameters in Heat Stressed Cows

LI Yudan; YANG Baokui; YANG Zhen; SUN Anquan; CAO Dongmei; HAN Zhaoyu

doi:10.3969/j.issn.1006-267x.2015.11.029

Chinese Journal of Animal Nutrition >

2015 , Vol. 27 >Issue 11: 3558 - 3566

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.11.029

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Effects of Different Chemical Forms of Trace Element on Milk Performance and Serum Parameters in Heat Stressed Cows

LI Yudan ,
YANG Baokui ,
YANG Zhen ,
SUN Anquan ,
CAO Dongmei ,
HAN Zhaoyu

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1. College of Animal Science and Technology, Nanjing Agricultural University, Nanjing 210095, China;
2. Omega Biotech Co., Ltd., Shanghai 200120, China

Received date: 2015-06-01

Online published: 2015-11-21

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Abstract

This experiment was conducted to study the effects of different chemical forms of trace element on milk performance and serum parameters of cows. Thirty two healthy Holstein cows with similar age, parity, lactation days and milk yield were randomly divided into four groups with 8 cows per group. Added 120 g/d distiller dried grains (DDGS) to control group, added 120 g/d inorganic trace element to test group Ⅰ, added 15 g/d organic trace element and 105 g/d DDGS to test group Ⅱ, and added 10 g/d organic trace element and 110 g/d DDGS to test group Ⅲ. The test lasted for 90 days. The results showed as follows:1) compared with control group, milk yield of test group Ⅰ had a trend to decline, while that of test group Ⅱ and test group Ⅲ had trends to increase; the differences of milk composition, dry matter intake, breathing rate were not significant among test groups (P>0.05); 2) on the 30th day, serum glutathione peroxidase (GSH-Px) activity of test group Ⅲ was significantly higher than that of the other groups(P<0.05); 3) on the 30th day, the content of serum copper was significantly higher than that of control group and test group Ⅰ (P<0.05), and serum selenium content was significantly higher than that of test group Ⅱ (P<0.05); on the 60th day, serum calcium content of test group Ⅲ was significantly higher than that of test group Ⅰ(P<0.05); 4) serum hormone and immunoglobulin G (IgG) contents had no significant differences among groups(P>0.05). Thus it can be seen that, under conditions of the present study, adding organic trace element in diet for heat stressed cows can make milk performance improved, serum antioxidant capacity and the contents of zinc, selenium and IgG increased, and the effects are dose dependent.

Key words： organic trace element; heat stress antisagent; milk yield; milk composition; cow

Cite this article

LI Yudan , YANG Baokui , YANG Zhen , SUN Anquan , CAO Dongmei , HAN Zhaoyu . Effects of Different Chemical Forms of Trace Element on Milk Performance and Serum Parameters in Heat Stressed Cows[J]. Chinese Journal of Animal Nutrition, 2015 , 27(11) : 3558 -3566 . DOI: 10.3969/j.issn.1006-267x.2015.11.029

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