维生素A及蛋氨酸锌水平对断奶仔猪生长性能及部分血清抗氧化指标的影响

doi:10.16431/j.cnki.1671-7236.2016.06.015

摘要/Abstract

摘要： 试验旨在研究添加不同水平维生素A (VA)与蛋氨酸锌(ZnMet)对断奶仔猪生长性能、部分血清抗氧化指标的影响。采用2因素3水平析因设计,选择81头28日龄断奶、体重为(7.94±0.62) kg的健康杜×长×大三元仔猪,按体重和性别随机分为9个处理组,每个处理3个重复,分别饲喂含不同剂量VA (0、3 000及6 000 IU/kg)和ZnMet (0、300及400 mg/kg)的日粮。试验预饲期7 d,试验期21 d。试验第0、7和14天逐头空腹称重,记录每日采食量并计算仔猪平均日增重(ADG)和料重比(F/G)。试验开始(35日龄)与结束(56日龄)时,每组随机抽取3头猪,早晨空腹采血,制备血清,测定血清抗氧化指标。结果显示:①与对照组相比,单独添加VA或ZnMet均能提高仔猪ADG (P < 0.05),但对F/G无显著影响 (P > 0.05);VA和ZnMet对仔猪ADG有互作效应,联合添加可以显著提高仔猪ADG (P < 0.05),但二者对F/G无互作效应。②与对照组相比,35日龄时,除单独添加300 mg/kg ZnMet组的GSH-Px活性无显著变化外,其他试验组的CuZn-SOD及GSH-Px活性水平均显著提高(P < 0.05);56日龄时,与对照组相比,单独添加ZnMet或VA均能显著提高仔猪血清CuZn-SOD活性水平(P < 0.05);同时添加VA与ZnMet能显著提高仔猪血清GSH-Px活性(P < 0.05),而单独添加VA或ZnMet虽能提高仔猪血清GSH-Px活性,但效果不显著(P > 0.05)。结果提示,日粮中单独添加VA、ZnMet或联合添加这两种营养素均能促进断奶仔猪生长,改善断奶仔猪抗氧化功能。

关键词: 维生素A; 蛋氨酸锌; 断奶仔猪; 生长性能; 血清抗氧化指标

Abstract: The study was conducted to investigate the effect of VA and ZnMet on growth performance and part of antioxidant indices of weaning piglets.A total of 81 28-day-old three way cross(Duroc×Landrace×Yorkshine) healthy weaning piglets with an initial average body weight of (7.94±0.62) kg were randomly assigned into 9 groups with 3 replicates per group and 3 piglets per replicate.Factorial design of two factors and three levels was used in this study,the three levels of VA were 0,3 000 and 6 000 IU/kg,and the three levels of ZnMet were 0,300 and 400 mg/kg.The pre-trial lasted for 7 d and the trial lasted for 21 d.Piglets were weighed with an empty belly one by one on the 0,7 and 14 d of the test.Daily intake was recorded everyday.At the same time,the ADG and F/G were calculated.Three piglets without eating were randomly selected in each group for collecting serum samples at the age of 35 and 56 days.The results showed that:① compared with control group,supplementation of VA or ZnMet increased ADG significantly (P < 0.05),while had no influence on F/G (P > 0.05).In addition,ADG was significantly affected by the combination of VA and ZnMet (P < 0.05).VA and ZnMet had interaction effect on ADG,while F/G was not influenced by the combination of VA and ZnMet (P > 0.05).②At 35 days,compared with control group,both the activity of serum CuZn-SOD and GSH-Px increased significantly in experimental groups except the activity of serum GSH-Px in the group added with 300 mg/kg ZnMet;At 56 days,compared with control group,supplementation of ZnMet or VA could significantly improve serum CuZn-SOD activity of piglets (P < 0.05).Supplementation of both VA and ZnMet could significantly increase serum GSH-Px activity (P < 0.05),while supplementation of VA alone or ZnMet alone had no effect on GSH-Px activity (P > 0.05).The results indicated that supplementation of VA or ZnMet alone or the combination of them could promote the growth performance and antioxidant function of weaning piglets.

Key words: vitamin A; ZnMet; weaning piglets; growth performance; serum antioxidant indices

中图分类号:

S828

彭秋媛, 黄大鹏. 维生素A及蛋氨酸锌水平对断奶仔猪生长性能及部分血清抗氧化指标的影响[J]. , 2016, 43(6): 1500-1505.

PENG Qiu-yuan, HUANG Da-peng. Effects of the Level of Vitamin A and ZnMet on Growth Performance and Partial Serum Antioxidant Index in Weaning Piglets[J]. , 2016, 43(6): 1500-1505.

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