文献类型：期刊文献

中文题名：Kinetics of selenium absorption in ligated small intestinal loops of chicks

作者：LIU Guo-qing[1];ZHANG Shu-min[1];AN Zhi-min[3];FENG Yan-zhong[4];DONG Xue-yu[1,5];LI Su-fen[5];LU Lin[1];ZHANG Li-yang[1];WANG Run-lian[6];LUO Xu-gang[2];LIAO Xiu-dong[1]

机构：[1]Mineral Nutrition Research Division,Institute of Animal Science,Chinese Academy of Agricultural Sciences,Beijing 100193,P.R.China;[2]Poultry Mineral Nutrition Laboratory,College of Animal Science and Technology,Yangzhou University,Yangzhou 225000,P.R.China;[3]Heilongjiang Provincial Animal Epidemic Prevention and Control Center,Harbin 150069,P.R.China;[4]Institute of Animal Husbandry,Heilongjiang Academy of Agricultural Sciences,Harbin 150086,P.R.China;[5]College of Animal Science and Technology,Hebei Normal University of Science and Technology,Qinhuangdao 066004,P.R.China;[6]Department of Animal Science,Guangdong Ocean University,Zhanjiang 524088,P.R.China

年份：2020

卷号：19

期号：8

起止页码：2095

中文期刊名：Journal of Integrative Agriculture

外文期刊名：农业科学学报（英文版）

收录：CSTPCD、、Scopus、CSCD2019_2020、CSCD

基金：financially supported by the National Natural Science Foundation of China(31601956);the Agricultural Science and Technology Innovation Program,China(ASTIP-IAS09);the earmarked fund for China Agriculture Research System(CARS-41)。

语种：英文

中文关键词：broiler;small intestine;selenium;absorption;kinetics

中文摘要：Selenium(Se)is an essential trace element that has a large number of biological functions for broilers.However,the absorption kinetics of Se from sodium selenite in the small intestine of broilers remains unclear.Therefore,two experiments were conducted with 28-d-old commercial male broilers to study the kinetics of Se absorption in ligated small intestinal segments.In experiment 1,the Se absorption in duodenal,jejunal,and ileal segments at different post-perfusion time points(0,20,40,60,80,100 and 120 min)were compared.In experiment 2,a kinetic study of Se absorption was conducted with the duodenal,jejunal,and ileal loops perfused with solutions containing 0,0.0375,0.075,0.15,0.30,or 0.60μg mL^-1 of Se as sodium selenite,and Se contents in perfusates were determined at 100 min after perfusion.The results from experiment 1 showed that the Se absorption increased in an asymptotic response(P<0.0001)to post-perfusion time within 120 min in all the small intestinal segments,but increased linearly(P<0.0001)at less than 100 min after perfusion in duodenal and ileal segments,while more than 96.0%of the maximum Se absorption occurred at 100 min after perfusion in each small intestinal segment.In experiment 2,there was no difference(P>0.05)in the Se absorption rate among different ligated small intestinal segments perfused with solutions containing 0.0375–0.15μg mL^-1 of Se,however,the Se absorption rate was higher(P<0.05)in the jejunum than that in the duodenum perfused with solutions containing 0.30–0.60μg mL^-1 of Se.The kinetic curves of Se absorption demonstrated that the Se absorption was a saturated carrier-mediated process in the duodenum,and the maximum absorption rate was 1271 pg min^-1 cm^-1;whereas the Se absorptions were a non-saturated diffusion process in the jejunum and ileum,and the diffusive constants were 2107 and 1777 cm2 min^-1,respectively.The results from the present study indicate that the jejunum is the main Se absorption site,and the Se absorption is a saturated carrier-mediated process in the duodenum,but a non-saturated diffusion process in the jejunum and ileum of broilers.