Influence of starch sources and dietary protein levels on intestinal functionality and intestinal mucosal amino acids catabolism in broiler chickens

查看全文 作　　者：Dafei [1]Yin;Peter [2]H.Selle;Amy [2]F.Moss;Youli [1]Wang;Xiaoyu [1]Dong;Zhibin [1]Xiao;Yuming [1]Guo;Jianmin [1]Yuan

机构地区：[1]State key Laboratory of Animal Nutrition,College of Animal Science and Technology,China Agricultural University,Beijing 100193,People’s Republic of China;[2]Poultry Research Foundation,The University of Sydney,Werombi Road,Camden,NSW 2570,Australia

出　　处：《Journal of Animal Science and Biotechnology》索引2019年第10卷第3期,共15页

基　　金：supported by National Natural Science Foundation of China(No.31772620);China Agricultural Research System Poultry-related Science and Technology Innovation Team of Peking(BAIC 04-2018) 摘　　要：Background: There is growing interest in carbohydrate and protein nutrition to enhance the efficiency of animal production.Reduced-crude protein diets depress environmental pollution and feeding cost,but the challenge to their adoption is maintaining digestive function and growth performance of birds.The present study was conducted to evaluate the influence of different dietary starch sources and protein levels on intestinal functionality and mucosal amino acid catabolism.Methods: Six dietary treatments,based on maize and soybean meal,were offered to 360 AA+male chicks from 6 to 35 d post-hatch as a 3 × 2 factorial array.Either waxy rice or amylose was added to a conventional maize-soy diet to provide three sources of starch with different digestion rates and relatively high and low dietary protein levels.Growth performance,parameters of intestinal functionality and concentrations of free amino acid in the portal circulation were determined.Results: In the grower phase,starch source influenced(P < 0.02) weight gain as diets containing amylose supported significantly higher weight gains than waxy rice.Significant increase of ileal ATP concentrations and Na^+/K^+-ATPase activity were found in amylose treatment.Also,amylose decreased BrdU positive cell numbers and down-regulated m RNA expression for CASP-3.GOT activity in the ileum was higher(P < 0.01) in birds offered low protein diets and there was a trend(P = 0.057) for waxy rice as a starch source to increase ileal GOT activities.There was a significant influence on the concentration of seventeen amino acids in the portal circulation with tryptophan the one exception.Waxy rice as a starch source generated 13.6% and 22.4% numerically higher concentrations of non-essential amino acids than maize and amylose,respectively.Conclusions: Amino acid catabolism in the gut mucosa is subject to nutritional regulation.Given that amino acids can be spared from catabolism in the gut mucosa by supplementation of amylose,it follows their post-enteral availability would be improved and intestinal energy would be derived more efficiently from glucose. 关键词：Amino acids BROILER CHICKENS ENTEROCYTES Glucose Starch

相关文献

参考文献（37）
引证文献（15）
耦合文献（0）

参考文献(37)

引证文献(15)

互联网出版许可证新出网证(渝)字10号全国400电话 - 免长途话费

Influence of starch sources and dietary protein levels on intestinal functionality and intestinal mucosal amino acids catabolism in broiler chickens

参考文献(37)

引证文献(15)

用户提示