文献类型：期刊文献

中文题名：Influence of Different Ratios of Cobalt and Copper Supplementation on Vitamin B_(12) Status and Nutrient Utilization in Sheep

英文题名：Influence of Different Ratios of Cobalt and Copper Supplementation on Vitamin B_(12) Status and Nutrient Utilization in Sheep

作者：WANG Run-lian[1,2];ZHANG Wei[1];ZHU Xiao-ping[1];JIA Zhi-hai[1]

机构：[1]College of Animal Science and Technology, China Agricultural University, Beijing 100193, P,R.China;[2]Department of Animal Science, Guangdong Ocean University, Zhanjiang 524088, P.R.China

年份：2010

卷号：9

期号：12

起止页码：1829

中文期刊名：Agricultural Sciences in China

外文期刊名：中国农业科学（英文版）

收录：Scopus、CSCD2011_2012、CSCD

基金：This work was supported in part by a grant from the National Key Technology R&D Program of China (2006-BAD14B07)

语种：英文

中文关键词：cobalt;vitamin B12;sheep;nutrient utilization

外文关键词：cobalt, vitamin B12, sheep, nutrient utilization

中文摘要：The present study is aimed to investigate the effects of different ratios of cobalt （Co） and copper （Cu） supplementation on vitamin B12 status and nutrient utilization in sheep. Twenty wether lambs with an average weight （22.9 ± 0.8） kg were randomly divided into five groups and fed with the control diet which was supplied with 0.3 mg kg^-1 DM （dry matter） of Co to the basal diet, and four supplemental diets which were supplied either 0.3 or 0.6 mg kg^-1 DM of Co and 10 or 20 mg kg^-1 DM of Cu to the basal diet, respectively for 8 wk. The supplementation of Co and Cu with different levels improved plasma vitamin B12 concentration which was increased with feeding time, but stable after 6 wk. Vitamin B12 status was accounted for Co intake with no combined effects by supplementation of different levels of Co and Cu. The plasma concentrations of methylmalonic acid, homocysteine, folic acid, and glucose did not show the consistent results with plasma vitamin B12, which was considered to be resulted from Cu action. Addition of Co and Cu with different levels had no influence on digestibility of dry matter （DM）, organic matter （OM）, crude protein （CP） and nitrogen free （NFE）, and N metabolism （P〉 0.05）, but the digestibility of fat and fibre （P〈0.01） was enhanced by supplementation of 0.3 mg kg^-1 DM of Co and 20 mg kg^-1 DM of Cu. In conclusion, the supplementation of Co and Cu with different levels has no influence on vitamin B12 status. The optimum ratio of Co and Cu in diet could enhance the nutrient utilization.

外文摘要：The present study is aimed to investigate the effects of different ratios of cobalt （Co） and copper （Cu） supplementation on vitamin B12 status and nutrient utilization in sheep. Twenty wether lambs with an average weight （22.9 ± 0.8） kg were randomly divided into five groups and fed with the control diet which was supplied with 0.3 mg kg^-1 DM （dry matter） of Co to the basal diet, and four supplemental diets which were supplied either 0.3 or 0.6 mg kg^-1 DM of Co and 10 or 20 mg kg^-1 DM of Cu to the basal diet, respectively for 8 wk. The supplementation of Co and Cu with different levels improved plasma vitamin B12 concentration which was increased with feeding time, but stable after 6 wk. Vitamin B12 status was accounted for Co intake with no combined effects by supplementation of different levels of Co and Cu. The plasma concentrations of methylmalonic acid, homocysteine, folic acid, and glucose did not show the consistent results with plasma vitamin B12, which was considered to be resulted from Cu action. Addition of Co and Cu with different levels had no influence on digestibility of dry matter （DM）, organic matter （OM）, crude protein （CP） and nitrogen free （NFE）, and N metabolism （P〉 0.05）, but the digestibility of fat and fibre （P〈0.01） was enhanced by supplementation of 0.3 mg kg^-1 DM of Co and 20 mg kg^-1 DM of Cu. In conclusion, the supplementation of Co and Cu with different levels has no influence on vitamin B12 status. The optimum ratio of Co and Cu in diet could enhance the nutrient utilization.