动物营养学报2019，Vol.31Issue(6)：2693-2700,8.DOI:10.3969/j.issn.1006⁃267x.2019.06.030
氧化锌对新生犊牛生长性能、免疫功能及直肠微生物菌群的影响
Effects of Zinc Oxide on Growth Performance, Immune Function and Rectal Microflora of Neonatal Dairy Calves
摘要
Abstract
This experiment was conducted to study the effects of zinc oxide on growth performance, immune function and rectal microflora of neonatal dairy calves. Twenty?four neonatal Holstein dairy calves were ran?domly allotted to four groups with 6 calves per group ( 2 males and 4 females). Calves in the control group ( Zn?0 group) were fed only milk and starter diet; calves in experimental groups were fed milk and starter diet supplemented with 40 ( Zn?40 group) , 80 ( Zn?80 group) and 120 mg zinc oxide ( Zn?120 group) ( as zinc) everyday, respectively. The trial lasted for 14 days. The results showed that different levels of zinc oxide had no significant effect on the average daily gain, milk intake, starter intake, total feed intake and feed to gain ra?tio of calves ( P＞0.05). Compared with the control group, the diarrhea rate of experimental groups was re?duced, but the difference was not significant ( P＞0.05). With the dietary zinc oxide supplemental level in?creased, the contents of immunoglobulin G, immunoglobulin M and immunoglobulin A in serum of experimen?tal groups were linearly increased ( P＜0.05 ) , the rectal Lactobacillus content was linearly increased ( P＜0.05) , and the rectal Escherichia coli content was tended to decrease linearly ( 0.05≤P＜0.10). In conclu?sion, different levels of zinc oxide have no effects on the growth performance and the diarrhea rate of neonatal dairy calves. However, compared with the control group, the serum immunoglobulin contents and rectal Lacto?bacillus content of experimental groups are increased, and rectal Escherichia coli content is decreased.[ Chinese Journal of Animal Nutrition, 2019, 31(6) :2693?2700]关键词
犊牛/氧化锌/生长性能/腹泻/免疫功能/直肠微生物Key words
dairy calves/zinc oxide/growth performance/diarrhea/immune function/rectal microflora分类
农业科技引用本文复制引用
魏婧雅,马峰涛,单强,孙鹏..氧化锌对新生犊牛生长性能、免疫功能及直肠微生物菌群的影响[J].动物营养学报,2019,31(6):2693-2700,8.基金项目
国家重点研发计划(2018YFD0500703) （2018YFD0500703）
中国农业科学院科技创新工程( ASTIP⁃IAS07) （ ASTIP⁃IAS07）
国家高层次人才特殊支持计划 （）
