饲料锌在生长猪粪尿中的排泄规律研究  

Study on Excretion of Feed Zinc in Feces and Urine of Growing Pigs

作　　者：邓卉 郭春华[1] 杨加豹[2] 邹成义[2] 陈瑾[2] 董瑷榕[1] 毕小兵 王亚东 DENG Hui;GUO Chun-hua;YANG Jia-bao;ZOU Cheng-yi;CHEN Jin;DONG Ai-rong;BI Xiao-bing;WANG Ya-dong(College of Life Science and Technology,Southwest University for Nationalities,Sichuan Chengdu 610041,China;Sichuan Animal Science Academy,Animal Breeding and Genetics Key Laboratory of Sichuan Province,Sichuan Chengdu 610066,China)

机构地区：[1]西南民族大学生命科学与技术学院,四川成都610041 [2]四川省畜牧科学研究院,动物遗传育种四川省重点实验室,四川成都610066

出　　处：《西南农业学报》2020年第1期180-185,共6页Southwest China Journal of Agricultural Sciences

基　　金：四川省公益性科研院所基本科研项目“饲料重金属锌在生长育肥猪上的排放规律研究”(SASA2018A07);西南民族大学研究生创新型科研项目(CX2019SZ146)

摘　　要：【目的】本试验旨在研究饲料锌在生长猪粪尿中的排泄规律,建立饲料锌摄入量与锌排泄量的预测模型。【方法】选用健康、体重相近的约克夏去势生长公猪20头,随机分成5组,每组4个重复,每个重复1头猪,单独饲养于代谢笼中。对照A组饲喂基础日粮,锌添加量为0,试验B、C、D、E组分别饲喂在基础日粮中添加20、40、60、80 mg/kg锌的试验日粮(硫酸锌形式)。预试期7 d,正试期4 d。【结果】①试验各组鲜粪锌含量和风干粪锌含量均高于对照组,且试验各组随日粮锌添加水平增加呈逐渐升高,试验D组和试验E组鲜粪锌含量、风干粪锌含量和粪锌日排泄总量均显著高于对照组(P<0.05);经回归分析,日粮锌添加水平或日粮总锌水平与鲜粪锌含量、风干粪锌含量存在着极显著的线性回归关系(P<0.01),与粪锌日排泄总量存在着显著的线性回归关系(P<0.05),可用所建立的回归方程来进行预测和控制。②各组尿锌含量和尿锌日排泄总量均无显著差异(P>0.05);经回归分析,日粮锌添加水平或日粮总锌水平与尿锌含量、尿锌日排泄总量无显著回归关系(P>0.05)。【结论】本试验条件下,生长猪日粮锌添加水平或日粮总锌水平与鲜粪锌含量、风干粪锌含量、粪锌日排泄总量存在显著的线性回归关系,而与尿锌含量和尿锌日排泄总量无显著回归关系,日粮中多余的锌主要通过消化道从粪中排泄,可根据日粮中锌水平预测粪锌排泄量,从源头上控制锌对环境的污染。[Objective]This experiment was conducted to study on excretion of feed zinc in feces and urine of growing pigs and establish the prediction model of zinc intake and zinc excretion.[Method]A total of 20 healthy castrated Yorkshire growing pigs with similar weight were randomly allotted to 5 dietary treatments with 4 replicates in each treatment and 1 pig in each replicate,animals were individually housed in cages.In 5 treatments,control group A was fed a basal diet without zinc supplementation,test group B,C,D,E were fed basal diet supplemented with 20,40,60 and 80 mg/kg zinc as zinc sulfate,respectively.The pre-test period lasted for 7 days,and the experimental period lasted for 4 days.[Result](i)The fresh fecal zinc content and air-dry fecal zinc content in experimental groups were higher than that in control group,with feed zinc supplementation levels being increased,both tended to be higher in the experimental groups.Fresh fecal zinc content,air-dry fecal zinc content and daily fecal zinc excretion in experimental group C and D were significantly higher than that in control group(P<0.05).Regression analysis demonstrated that there was extremely significant linear regression relationship between feed zinc supplementation levels or feed zinc total levels and air-dry fecal content(P<0.01),in addition,there was significant linear regression relationship between feed zinc supplementation levels or feed zinc total levels and daily fecal zinc excretion(P<0.05).Therefore,regression equations could be established for prediction and control.(ii)There were no significant differences in urinary zinc content and daily urinary zinc excretion among all groups(P>0.05).Regression analysis demonstrated th砒there was no significant regression relationship between feed zinc supplementation levels or feed zinc total levels and urinary zinc content or daily urinary zinc excretion ( P > 0. 05 ). [Conclusion] Under the condition of this trial, there was significant linear regression relationship between feed zinc supplementation lev

关 键 词：饲料锌 生长猪 排泄规律 

分 类 号：S816.15[农业科学—饲料科学]