动物营养学报2015，Vol.27Issue(11)：3558-3566,9.DOI:10.3969/j.issn.1006-267x.2015.11.029
不同化学形式微量元素对热应激奶牛生产性能和血清指标的影响
Effects of Different Chemical Forms of Trace Element on Milk Performance and Serum Parameters in Heat Stressed Cows
摘要
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 groupⅠ, added 15 g/d organic trace element and 105 g/d DDGS to test groupⅡ, and added 10 g/d organic trace element and 110 g/d DDGS to test groupⅢ. The test lasted for 90 days. The results showed as follows:1) compared with control group, milk yield of test groupⅠ had a trend to decline, while that of test groupⅡ and test groupⅢhad trends to increase; the differences of milk composition, dry matter intake, breathing rate were not signifi-cant among test groups ( P>0.05);2) on the 30th day, serum glutathione peroxidase ( GSH-Px) activity of test groupⅢ 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 groupⅠ( P<0.05) , and serum se-lenium 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 in-creased, and the effects are dose dependent.关键词
有机微量元素/抗热应激剂/产奶量/乳成分/奶牛Key words
organic trace element/heat stress antisagent/milk yield/milk composition/cow分类
农业科技引用本文复制引用
李玉丹,杨保奎,杨榛,孙安权,曹冬梅,韩兆玉..不同化学形式微量元素对热应激奶牛生产性能和血清指标的影响[J].动物营养学报,2015,27(11):3558-3566,9.基金项目
科技部十二五奶业专项(2012BAD12B10) （2012BAD12B10）
奥格生物技术有限公司委托课题 （）
