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《Chinese Journal of Animal Nutrition》 2011-04
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Probiotics: Effects on Performance and Mechanisms of Action in Suckling and Weaner Piglets

YIN Qingqiang1,2 LI Xiaofei1 CHANG Juan1 ZHENG Qiuhong1YANG Yurong1 ZUO Ruiyu1 LIU Junxi2(1.College of Animal Science and Veterinary Medicine,Henan Agricultural University,Zhengzhou 450002 China;2.Henan Engineering &Technology Research Center of Feed Microbiology,Zhoukou 466000,China)  
In order to study the effects of probiotics on the performance and health in suckling and weaner piglets,the experiments were divided into two phases.In the first phase,the piglets were fed creep diets from 7 to 35 days old,and weaned at the age of 28 d.In the second phase,the piglets were fed starter diets from 35 to 60 days old.The results are showed as follows: 1) the addition of probitics and antibiotics in the creep and starter diets had no significant effects on piglet growth(P0.05),but 0.10% probiotics in the creep diet and 0.05% probiotics in the starter diet could reduce diarrhea rate and mortality,compared with the control and antibiotics(P0.05),in which the visible counts of probiotics were 1×106 and 5×105 cfu/g,respectively.2) The addition of 0.05% probiotics in the starter diet of piglets could increase the number of lactic acid bacteria in stomach,jejunum,colon and caecum(P0.05),and reduce E.coli in stomach and caecum(P0.05),compared with the control and antibiotics,which would keep gut microbes stable and help to reduce digestive diseases.3) Probiotics could reduce the membrane thickness of jejunum,colon and caecum(P0.05);reduce crypt depth of jejunum and caecum,while increase crypt depth of colon(P0.05).Probiotics had the ability to increase the activities of protease and amylase in stomach,but reduce amylase activity in jejunum(P0.05).In addition,it could keep pH stable in stomach and jejunum.4) Probiotics could increase the activities of serum aspartate aminotransferase and lactate dehydrogenase as well as the concentration of immunoglobulin A(P0.05),while reduce serum alkaline phosphatase activity(P0.05),and it had no significant effect on other serum biochemical indices.It can be concluded that probiotics will be an ideal feed additive to reduce digestive diseases and mortality,and improve immunity and health in piglets.
【Fund】: 河南省科技成果转化项目(082201180001)
【CateGory Index】: S828.5
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