不同比例有机锌与无机锌对断奶仔猪生长性能的影响

试验旨在研究不同配合比例的锌氨基酸螯合物(Zn-AAC)与硫酸锌(ZnSO4)对断奶仔猪生长性能的影响。选用45头28日龄断奶三元杂交仔猪,随机分为5组,每组3个重复,每个重复3头仔猪,基础日粮相同,分别接受锌添加量相同(100mg/kg)但有机锌和无机锌配合比例不同的处理日粮,对照组锌100%由ZnSO4提供,其余4组分别用Zn-AAC取代对照组锌添加量的40%、60%、80%和100%。试验期28 d,包括前期(1~14 d)和后期(15~28 d)2个阶段。结果表明,与对照组(无机锌100%)相比,有机锌分别取代无机锌的40%、60%、80%和100%,试验前期平均日增重(ADG)分别提高22.0%(P0.05)、38.5%(P0.01)、32.6%(P0.05)、26.2%(P0.05),平均日采食量(ADFI)分别增加24.6%(P0.05)、25.3%(P0.05)、23.5%(P0.05)、23.8%(P0.05);试验后期所有含有机锌组的ADFI增加(P0.05);整个试验期,含有机锌60%组的ADG高于对照组(P0.01),各组间饲料转换效率(FCR)差异不显著(P0.05)。因此,断奶仔猪日粮补充常规剂量的锌,有机锌与无机锌比较,能够提高仔猪ADG和ADFI;有机锌与无机锌合用的饲喂效果优于单一使用,其最佳配合比例为60%有机锌加40%无机锌。

The Effect of Different Proportions of Organic Zinc and Inorganic Zincon Growth Performance of Weaning Pigs

This study explored the effect of different proportions of zinc amino acid chelates(Zn-AAC) and zinc sulphate(ZnSO4) on the growth performance of weaning pigs.Forty five hybrid pigs of 28 days old were selected and randomly allotted to one of five dietary treatments.There were three replicates per treatment and three pigs in each replicate.All animals were fed with the same basic diet supplied 100 mg/kg of zinc but with different proportions of organic zinc(Zn-AAC) and inorganic zinc(ZnSO4).Pigs in the cont...