Mechanism of the Effect of Bacillus coagulans on Production Performance of Laying Hens in Late Laying Period  

作　　者：Xing Guanrun Lang Xinrui Wu Ji’an Lou Hongxing Liu Wenqiang Zhang Hengshuo Dong Xinyang Pan Xiaoliang Wang Youming 

机构地区：[1]College of Animal Science and Technology,Shihezi University,Shihezi 832003,China [2]School of Animal Science,Zhejiang University,Hangzhou 310012,China [3]Zhejiang Academy of Agricultural Sciences,Hangzhou 310021,China

出　　处：《Animal Husbandry and Feed Science》2019年第5期125-130,共6页动物与饲料科学（英文版）

摘　　要：[Objective]The paper was to investigate the mechanism of Bacillus coagulans preparation in improving production performance of laying hens in late period of laying.[Method]A total of 648 individuals of"Jingfen 1"laying hens(66 weeks of age)in late period of laying were randomly divided into four groups,six replicates each group,and each group had 27 individuals of laying hens.The laying hens in control group were fed with basal diet,and those in experimental groupsⅠ,Ⅱ and Ⅲ were fed with the basal diets added with 3.33×10^6,1×10^7,3.33×10^7 CFU/g B.coagulans,respectively.The pretrial lasted one week,and the formal test lasted eight weeks.[Result]Compared with the control group,the laying rate in group Ⅰ increased significantly,and the feed-gain ratio in experimental group Ⅱ decreased noticeably while the spleen index increased remarkably;the alkaline phosphatase activities and blood calcium content in experimental groups Ⅰ,Ⅱ and Ⅲ increased significantly(P<0.05),while the triglyceride content decreased remarkably(P<0.05);the urea content in experimental groups Ⅰ and Ⅱ decreased obviously(P<0.05).Adding B.coagulans significantly increased the specific activity of amylase,lipase and protease in various intestinal mucosa of small intestine(P<0.05);adding B.coagulans significantly increased the content of follicle-stimulating hormone(FSH)and estradiol(E2),and significantly increased the mRNA expression of follicle stimulating hormone receptor gene(FSHR).[Conclusion]B.coagulans preparation could significantly improve the production performance of laying hens in late period of laying;appropriately enhance the immune capacity of laying hens;improve the serum biochemical indicators;increase the activity of digestive enzymes in the small intestine;and promote the release of gonadal hormone and the mRNA expression of FSHR gene in the ovary.

关 键 词：Bacillus coagulans Laying hen Late period of laying Production performance Serum biochemistry Small intestinal enzyme activity Reproductive hormones mRNA expression of ovary receptors 

分 类 号：S831[农业科学—畜牧学]