动物营养学报2025，Vol.37Issue(3)：1738-1747,10.DOI:10.12418/CJAN2025.147
低蛋白质饲粮对白羽肉鸡生长性能及心脏微量元素含量、相关酶活性和基因表达的影响
Effects of Low Protein Diet on Growth Performance and Heart Trace Element Contents,Related Enzyme Activities and Gene Expression of White-Feather Broilers
摘要
Abstract
This experiment was conducted to investigate the effects of low protein diet on growth performance and heart trace element contents,related enzyme activities and gene expression of white-feather broilers.A sin-gle-factor completely randomized design was used in the experiment,seventy-two healthy 1-day-old Arbor A-cres(AA)broilers were randomly allotted to 2 groups with 6 replicates per group and 6 chickens per replicate.The dietary crude protein levels of 2 groups were 21.5%(control group)and 19.5%(low protein group),re-spectively.The experimental period was 21 days.The results showed that compared with the control group:1)the average daily feed intake,average daily gain,feed to ratio gain and mortality of the low protein group were no significant difference(P＞0.05);2)the heart zinc content of the low protein group was significantly de-creased(P＜0.05),and the heart copper and manganese contents were trend to decrease(0.05＜P＜0.10);3)the heart total superoxide dismutase,manganese superoxide dismutase and succinate dehydrogenase activities and total antioxidant capacity of the low protein group were significantly increased(P＜0.05);4)the mRNA relative expression level of manganese superoxide dismutase in heart of the low protein group was significantly decreased(P＜0.05),and the mRNA relative expression level of peroxidase in heart was trend to decrease(0.05＜P＜0.10).In summary,the reduce of dietary crude protein level from 21.5%to 19.5%not affect the growth performance of broilers during 1 to 21 days of age,but improve the antioxidant function and activity of key enzyme containing manganese or iron in heart,reduce the zinc deposition in heart,and have no significant adverse effect on the utilization of copper,iron and manganese in heart.[Chinese Journal of Animal Nutri-tion,2025,37(3):1738-1747]关键词
低蛋白质饲粮/微量元素/酶活性/基因表达/抗氧化Key words
low protein diet/trace element/enzyme activities/gene expression/antioxidant分类
畜牧业引用本文复制引用
王冲,刘洪丽,吕林,李笑然,廖秀冬,张丽阳,李顺英,林烜旭,黄靓,孙久鹏,曹春宇..低蛋白质饲粮对白羽肉鸡生长性能及心脏微量元素含量、相关酶活性和基因表达的影响[J].动物营养学报,2025,37(3):1738-1747,10.基金项目
国家重点研发计划课题(2022YFD1300504) （2022YFD1300504）
中国农业科学院科技创新工程专项经费(ASTIP-IAS09) （ASTIP-IAS09）
河北省现代农业产业技术体系建设专项资金(HBCT2024270202) （HBCT2024270202）
