复合微量元素缓释丸对放牧反刍动物Cu、Co、Se营养价值的研究

从放牧生态环境大群的大别山黄牛和英山白山羊中选择年龄，体重相近的２０头牛和２０头羊，各随机分为两组，每组１０头，雌、雄均匀配，以复合微量元素缓释丸为试验材料，、每Ⅰ组投丸为试验组，每Ⅱ组不投丸为对照组，牛的两组每组以５头补料，５头不补料，试验期１３５ｄ。羊的两组均不补料，为全放牧方式，试验期６０ｄ，试验结束对羊Ⅰ、Ⅱ组各随机抽取３头屠宰，取样测定肝、肾、脾、肌肉、心、血和瘤胃内容物测定Ｃｕ、Ｃｏ和

Cu,Co and Se nutritive value of compound trace elements controlled-release boluses for grazing ruminants

Twenty cattle with the similar old and weight were randomly divided into two groups for 135d,while twenty white goats were randomly divided into two groups for 60d. Each group consisted of ten animals, and the ratio of male and female was same. Each of animals in one group was administered an initial bolus, used as treatment group. In the other group, animals were not administered the bolus, used as control group. In the cattle feeding experiment, five cattle of each group was supplemented feed, and the other five cattles were not supplemented feed. In the goat feeding experiment, all of goats were grazing, and not supplemented feed. At the end of goat feeding experiment, three goats of each group were randomly selected to slaughter. Liver, kidney, spleen, muscle, heart, blood and matter in the rumen were collected to assay for Cu, Co and Se. The results showed that the average daily gain of cattle supplemented and no supplemented feeds in the administered and no administered group was 483.00g, 302.83g, 445.84g and 282.23g, respectively. There had significantly difference between the administered group and no administered group(p<0.05). The average daily gain of goats in the administered and no administered groups was 68.83g and 50.67g,and significant difference between the two groups (p<0.01). Administering the boluses improved the contents of Cu, Co and Se in the tissues of goats, significantly.