摘要
为观察复合营养舔砖对奶牛血清中微量元素水平的影响,选择高、中、低产中国荷斯坦奶牛各8头,补饲复合营养舔砖,于第1、2、3、4月测定血清Cu、Mn、Fe、Zn的含量。结果表明,补饲后血清Cu的含量除第1月升高外,其余各月都有所降低;血清Mn的含量各组及各时间段均极显著高于补饲前(P<0.01);血清Fe的含量,高、中产奶牛补饲前后无显著性差异,低产奶牛第2、3月明显高于补饲前(P<0.01和P<0.05);血清Zn的含量有所提高,其中高产奶牛较为明显;Zn/Cu比值随着饲喂周期的增加而增大。说明复合营养舔砖对提高奶牛血清微量元素水平有促进作用。
The objective of this study was to evaluate the ability of Holstein dairy cows to regulate intake of multinutrient blocks with trace mineral contents.Holstein dairy cows were chosen at random,and divided into three groups,high yield dairy cows,middle yield dairy cows,and low yield dairy cows,respectively. After feeding for 1,2,3 and 4 months,the contents of Cu,Mn,Fe and Zn in serum were detected.The results showed that the content of serum Cu was reduced except the first month.The content of serum Mn in all groups was higher than that before feeding period （P 〈0.01）.The content of serum Fe in high and middle yield dairy cows had no significant difference compared with before feeding period,but higher than that before feeding period in low yield dairy cows on second and third month （P 〈0.01 and P 〈0.05）.The content of serum Zn was increased,especially in the high yield dairy cows.The ratio of Cu/Zn was in-creased with the feeding cycle extend.In conclusion,the results of this experiment showed that multinu-trient blocks have significant simulative effect on improving serum level of trace elements in dairy cows.
出处
《动物医学进展》
CSCD
北大核心
2014年第11期62-65,共4页
Progress In Veterinary Medicine
基金
农业科技成果转化资金项目(2010GB23260564)
中央级科研院所基本科研业务费(1610322013003)
关键词
复合营养舔砖
微量元素
奶牛
血清
multinutrient block
trace element
dairy cow
serum
