不同铜源及贮存温度对仔猪复合预混合饲料中VA稳定性的影响研究  

Effects of Different Copper Sources and Storage Temperature on VA Stability in Piglet Compound Premix Feed

作　　者：余敏 李芳 罗荣 罗雄 YU Min;LI Fang;LUO Rong;LUO Xiong(Chengdu Shuxing Feed,INC.,Chengdu 611633,China;Sichuan Weiaisheng Animal Nutrition,INC.,Chengdu 611633,China)

机构地区：[1]成都蜀星饲料有限公司,四川成都611633 [2]四川威艾盛动物营养有限公司,四川成都611633

出　　处：《畜牧与饲料科学》2019年第9期34-37,共4页Animal Husbandry and Feed Science

基　　金：四川省重点研发项目(2018NZ0094)

摘　　要：旨在研究超稳硫酸铜和碱式氯化铜作为铜源,对仔猪复合预混合饲料中VA稳定性的影响,并考查不同贮存温度对仔猪复合预混合饲料中VA稳定性的影响。采用单因子试验设计方法,设2个处理组,即超稳硫酸铜组和碱式氯化铜组。将各组配制好的试验样品平均分为9份,其中,3份置于常温环境,3份置于高温环境,3份置于低温环境。从第0天开始,每隔8 d检测1次所有样品中的VA含量,共检测32 d,计算不同贮存时间仔猪复合预混合饲料中的VA损失率。结果表明:在常温、高温和低温贮存环境中,随着贮存时间的延长,超稳硫酸铜组和碱式氯化铜组的VA损失率均呈升高趋势,并且在各检测时间点,超稳硫酸铜组的VA损失率均极显著低于碱式氯化铜组(P<0.01);在饲料中铜源相同的情况下,贮存环境温度越高,VA损失率越高;贮存温度对仔猪复合预混合饲料中VA损失率的影响高于铜源对其的影响。综上提示,超稳硫酸铜可降低仔猪复合预混合饲料中VA的损失率,其作用显著优于碱式氯化铜,并且温度对VA稳定性的影响远超铜源对其的影响。The aims of the present study were to assess the effects of ultra-stable copper sulfate and copper chloride hydroxide as copper sources on the stability of VA in piglet compound premix feed,and to evaluate the impacts of different storage temperatures on the stability of VA.This experiment was carried out with single factor test design method,and two treatment groups including ultra-stable copper sulfate group and copper chloride hydroxide group were set.The prepared samples in both groups were averagely divided into 9 parts and were placed at room temperature(n=3),high temperature(n=3)and low temperature(n=3)environment,respectively.The VA content of all samples was detected every 8 days in a 32-day-long period from the start of the experiment(0 day),and the loss rate of VA in compound premix feed of piglet at different storage time was calculated.The results showed that the loss rate of VA in ultra-stable copper sulfate group and copper chloride hydroxide group was increased with the extension of storage duration in normal temperature,high temperature and low temperature environment,and the loss rate of VA in ultra-stable copper sulfate group was significantly(P<0.01)lower than that in copper chloride hydroxide group at each detection time point;the loss rate of VA was elevated as the increase of storage environment temperature in both of the groups;the storage temperature had greater impacts on the loss rate of VA in piglet compound premix feed than copper sources did.In conclusion,ultra-stable copper sulfate had the effect of reducing the loss rate of VA in piglet compound premix feed,and it performed better than copper chloride hydroxide.Furthermore,the effect of temperature on the stability of VA was far greater than that of copper sources.

关 键 词：超稳硫酸铜 碱式氯化铜 温度 VA 复合预混合饲料 损失率 

分 类 号：S816[农业科学—饲料科学]