动物营养学报2018，Vol.30Issue(3)：1162-1171,10.DOI:10.3969/j.issn.1006-267x.2018.03.042
不同锌源及水平对生长育肥猪生长性能、血清抗氧化指标及微量元素利用的影响
Effects of Different Zinc Sources and Levels on Growth Performance,Serum Antioxidant Indices and Utilization of Trace Elements of Growing-Finishing Pigs
摘要
Abstract
This experiment aimed to evaluate the effects of low levels of zinc methionine (Zn-Met) or zinc sulfate (ZnSO4) on growth performance,serum antioxidant indices and utilization of trace elements to determine the appropriate level of zinc in diets for growing-finishing pigs,so that realize the high efficient utilization of resources,and reduce the environmental impact of zinc in ex.creta.Thirty-two growing-finishing pigs (Duroc× Landrace×Largewhite) with average weight of (33.70±2.76) kg were randomly divided into 4 groups with 8 replicates (1 pig per replicate).The control group was fed a basal diet,while experimental groups were fed the basal diets supplemented with 40 mg/kg Zn-Met,40 mg/kg ZnSO4 and 80 mg/kg ZnSO4 (calculate by zinc),respectively.There was a 72-day experimental period including 2 stages of a growing period and a finishing period after 7-day adaptation.The results showed as follows:1) compared with the control group,there were no significant differences on average daily gain weight,average daily feed intake and feed to gain ratio of growing-finishing pigs with different zinc sources and levels (P＞0.05).2) Compared with the control group,dietary zinc sources and levels could significantly increase the activity of total superoxide dismutase (T-SOD),glutathion peroxidase (GSH-Px) and copper and zinc superoxide dismutase (CuZn-SOD) (P＜0.05),whereas could remarkably decrease the malondialdehyde (MDA) content (P＜0.05) in serum of growing-finishing pigs.Besides,group with 40 mg/kg Zn-Met got the highest activity of T-SOD and GSH-Px and the lowest MDA content in serum,while the serum CuZn-SOD activity was increased with the addition of ZnSO4,which was the highest in 80 mg/kg ZnSO4 group.3) Compared with the control group,dietary Zn-Met significantly increased the apparent absorptivity of zine,copper and manganese (P＜0.05),while dietary ZnSO4 only significantly increased the apparent absorptivity of zinc (P＜0.05) which was decreased with the ZnSO4 addition.Meanwhile,the apparent absorptivity of zinc in the 40 mg/kg Zn-Met group was the highest.It is concluded that both zinc sources and levels can't significantly promote the growth performance,but can significantly improve the serum antioxidant indices and apparent absorptivity of trace elements of growing-finishing pigs.Under this experimental conditions,the suitable ZnSO4 supplementation level for growing-finishing pigs should be below 80 mg/kg,while 40 mg/kg Zn-Met gets a better effect.关键词
有机锌/生长育肥猪/抗氧化/表观吸收率Key words
organic zinc/growing-finishing pig/antioxidant/apparent absorptivity分类
农业科技引用本文复制引用
牛现琇,杨维仁,袁学军,张崇玉,薛峰,程振峰,张本盛..不同锌源及水平对生长育肥猪生长性能、血清抗氧化指标及微量元素利用的影响[J].动物营养学报,2018,30(3):1162-1171,10.基金项目
山东省现代农业产业技术体系生猪创新团队专项资金(SDAIT-08-05) （SDAIT-08-05）
“双一流”奖补资金资助 （）
