饲粮添加蛋氨酸锌或氧化锌对新生犊牛锌代谢的影响  

Effects of Dietary Supplementation of Zinc Methionine or Zinc Oxide on Zinc Metabolism of Newborn Calves

作　　者：郝丽媛[1] 马峰涛 孙鹏[1] HAO Liyuan;MA Fengtao;SUN Peng(State Key Laboratory of Animal Nutrition,Institute of Animal Sciences,Chinese Academy of Agricultural Sciences,Beijing 100193,China)

机构地区：[1]中国农业科学院北京畜牧兽医研究所,动物营养学国家重点实验室,北京100193

出　　处：《动物营养学报》2020年第8期3725-3731,共7页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：中央级公益性科研院所基本科研业务费专项(Y2020GH11-2)资助;国家重点研发计划(2016YFD0500507);中国农业科学院科技创新工程(ASTIP-IAS07);国家高层次人才特殊支持计划。

摘　　要：本试验旨在研究饲粮添加蛋氨酸锌或氧化锌对新生犊牛锌代谢的影响。试验选取36头体重相近的新生荷斯坦母犊牛,随机分成3组,每组12头。对照组无添加,蛋氨酸锌组每日每头牛添加457 mg蛋氨酸锌(相当于80 mg锌),氧化锌组每日每头牛添加104 mg氧化锌(相当于80 mg锌)。试验期14 d。结果表明:1)饲粮添加氧化锌或蛋氨酸锌均可显著提高犊牛血清中锌含量(P<0.05)。饲粮添加氧化锌或蛋氨酸锌对犊牛血清中钙、铜、铁、镁和磷含量无显著影响(P>0.05)。2)饲粮添加氧化锌或蛋氨酸锌对犊牛血清中锌代谢相关指标均无显著影响(P>0.05)。3)饲粮添加氧化锌有提高犊牛粪便中锌含量的趋势(P=0.079)。综上所述,本试验条件下,饲粮中添加蛋氨酸锌或氧化锌形式的锌对犊牛铜、铁、钙、镁、磷等微量元素代谢无负面影响,对血清中锌代谢相关指标无显著影响。蛋氨酸锌组犊牛血清中锌含量高于氧化锌组,而粪便中锌含量低于氧化锌组,说明有机锌的生物利用率高于无机锌。The objective of this study was to investigate the effects of dietary supplementation of zinc methionine or zinc oxide on zinc metabolism of newborn calves.Thirty-six newborn Holstein dairy female calves were randomly assigned to 3 groups with 12 calves per group.Calves in the control group received no addition of zinc,calves in the zinc methionine group supplemented 457 mg zinc methionine per head per day(equivalent to 80 mg of zinc),and calves in the zinc oxide group supplemented 104 mg zinc oxide per head per day(equivalent to 80 mg of zinc).The experiment lasted for 14 days.The results showed as follow:1)dietary supplementation of zinc oxide or zinc methionine significantly increased the serum zinc content of calves(P<0.05).Dietary supplementation of zinc oxide or zinc methionine had no significant effects on contents of calcium,copper,iron,magnesium and phosphorus in serum of calves(P>0.05).2)Dietary supplementation of zinc oxide or zinc methionine had no significant effects on serum zinc metabolism related indices of calves(P<0.05).3)Dietary supplementation of zinc oxide had a tendency to increase the fecal zinc content of calves(P=0.079).In summary,under the condition of this experiment,dietary supplementation of zinc oxide or zinc methionine have not negatively influence the metabolism of trace elements such as copper,iron,calcium,magnesium and phosphorus of calves,and have no significant effects on serum zinc metabolism related indices.The serum zinc content of calves in zinc methionine group is higher than that in zinc oxide group,and the fecal zinc content is lower than that in zinc oxide group,which indicate that the bioavailability of organic zinc is higher than that of inorganic zinc.

关 键 词：氧化锌 蛋氨酸锌 新生犊牛 锌代谢 

分 类 号：S823[农业科学—畜牧学]