The influence of dietary crude protein concentrations,grain types and arginine:lysine ratios on the performance of broiler chickens

作     者：Shemil P.Macelline Peter V.Chrystal Chanon Inanan Mehdi Toghyani Peter H.Selle Sonia Yun Liu Shemil P.Macelline;Peter V.Chrystal;Chanon Inanan;Mehdi Toghyani;Peter H.Selle;Sonia Yun Liu

作者机构：School of Life and Environmental SciencesFaculty of ScienceThe University of SydneyCamperdown2006NSWAustralia Poultry Research Foundation within The University of SydneCamden2570NSWAustralia Complete Feed SolutionsHowick2145New Zealand Sydney School of Veterinary ScienceFaculty of ScienceThe University of SydneyCamden2570NSWAustralia 

出 版 物：《Animal Nutrition》 (动物营养（英文版）)

年 卷 期：2023年第14卷第3期

页      面：259-268页

核心收录：

学科分类：0905[农学-畜牧学] 0906[农学-兽医学] 09[农学] 

基　　金：AgriFutures Chicken-meat for funding the project“Optimising amino acid profiles and energy in reducedprotein diets”(PRJ-010520) financial support provided by Australian Government Research Training Program Scholarship(RTP)received by PhD candidate Mr Shemil Macelline 

主　　题：Amino acid Broiler chickens Energy Protein Sorghum Wheat 

摘      要：The objective of this study was to investigate the effects of dietary crude protein(CP)concentrations,grain types and arginine:lysine ratios on performance parameters of broiler *** 2×2×2factorial array of dietary treatments harnessed two CP concentrations(210 and 170 g/kg),two feed grains(wheat and sorghum),and two arginine:lysine ratios(104 and 110).Each dietary treatment was offered to 7 replicates of 14 birds per floor pen,a total of 784 off-sex male,Ross 308 broilers,from 14 to 35 d *** dietary CP reduction compromised weight gain by 10.0%(2078 versus 2310 g/bird)as a main effect and FCR by 7.51%(1.474 versus 1.371),subject to an *** a three-way interaction(P=0.008),expanded arginine:lysine ratios improved FCR by 2.30%in 170 g/kg CP,sorghum-based diets but compromised FCR by 2.12%in corresponding wheat-based *** was the more suitable feed grain in reduced-CP diets as sorghum generated significant advantages in weight gain of 7.59%(2154versus 2002 g/kg)and FCR of 6.94%(1.421 versus 1.527)in birds offered 170 g/kg CP *** dietary CP and feed grain generated significant and divergent impacts in apparent ileal digestibility coefficients for the majority of 16 assessed amino *** CP reductions increased non-bound amino acid inclusions(NBAA)in wheat-based diets(48.96 versus 9.80 g/kg)to a greater extent than sorghum-based diets(35.3 versus 9.50 g/kg)and increasing dietary NBAA inclusions were linearly associated with compromised weight gain(r=-0.834;P0.001)and FCR(r=0.862;P0.001).Increasing ratios of free arginine to lysine plasma concentrations were linearly(r=-0.466;P=0.004)related to improvements in *** implications of the observed outcomes are discussed and possible explanations are advanced.