Role of dietary gamma-aminobutyric acid in broiler chickens raised under high stocking density

作     者：Su-Been Jeong Yoo Bhin Kim Jeong-Woo Lee Da-Hye Kim Byung-Hern Moon Hong-Hee Chang Yang-Ho Choi Kyung-Woo Lee Su-Been Jeong;Yoo Bhin Kim;Jeong-Woo Lee;Da-Hye Kim;Byung-Hern Moon;Hong-Hee Chang;Yang-Ho Choi;Kyung-Woo Lee

作者机构：Department of Animal Science and TechnologyKonkuk UniversitySeoul05029Republic of korea CellTech Co.Ltd.Chungbuk27622Republic of Korea Department of Animal ScienceGyeongsang National Universityjinju52828Republic of Korea 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2020年第6卷第3期

页      面：293-304页

核心收录：

学科分类：0710[理学-生物学] 090502[农学-动物营养与饲料科学] 0905[农学-畜牧学] 0906[农学-兽医学] 09[农学] 

基　　金：supported by the Korean Institute of Planning and Evaluation for Technology in Food Agriculture Forestry and Fishery(IPET)through the Agri-Bio Industry Technology Development Program funded by the Ministry of Agriculture Food and Rural Affairs(316036-3) 

主　　题：Gamma-aminobutyric acid Stocking density Growth performance Stress indicator Broiler chicken 

摘      要：The present study was conducted to evaluate the effects of dietary gamma-aminobutyric acid(GABA)in broiler chickens raised in high stocking density(HSD)on performance and physiological responses.A total of 900 male broiler chicks(Ross 308)at 1 d old were assigned in a 2×2 factorial arrangement to 4 treatments(10 replicates per treatment)with stocking density,7.5 birds/m^2(low stocking density;LSD)or 15 birds/m^2(HSD),and dietary GABA,0 or 100 mg/*** raised in HSD exhibited a decrease in body weight gain in all phases(P0.05)and feed intake in starter and whole phases(P0.01),and an increase in feed conversion ratio in the finisher phase(P0.01)compared with LSD-raised ***,dietary GABA did not affect growth performance nor interacted with stocking density on production *** HSD *** increased relative liver weight on d 35 whereas dietary GABA increased relative liver weight and decreased relative bursa weight on d *** stocking density and dietary GABA affected yield and quality of breast and leg *** GABA increased(P0.05)width of tibia on d 35 and interacted(P=0.054)with stocking density on breaking stocking density on d *** HSD *** group lowered(P0.05)feather coverage *** interaction between stocking density and GABA on surface temperature of shank on d 21 was noted(P=0.024).Dietary GABA exhibited an opposite effect on the concentrations of cecal short-chain fatty acids depending on stocking density leading to a moderate to significant *** density decreased alpha-1-acid glycoprotein whereas dietary GABA decreased heterophil-to-lymphocyte ratio and corticosterone in blood or serum *** biochemical parameters were altered by stocking density or dietary *** is concluded that dietary GABA alleviated stress indices including corticosterone and heterophilto-lymphocyte ratio,but failed to reverse stocking density-induced growth depression.