动物营养学报2025，Vol.37Issue(2)：987-998,12.DOI:10.12418/CJAN2025.086
饲粮代谢能水平对84～119日龄肉用品系琅琊鸡生长性能、屠宰性能、肉品质的影响
Effects of Dietary Metabolizable Energy Level on Growth Performance,Slaughter Performance and Meat Quality of Meat Strain Langya Chickens Aged from 84 to 119 Days
摘要
Abstract
The aim of this experiment was to study the effects of dietary metabolizable energy(ME)level on growth performance,slaughtering performance and meat quality of meat strain Langya chickens age from 84 to 119 days,in order to clarify the appropriate dietary ME level.Nine hundred 77-day-old meat strain Langya chickens of equal weight were randomly divided into 10 groups with 6 replicates of 15 chickens per replicate.Groups 1 to 5 were Langya chicken roosters and groups 6 to 10 were Langya chicken hens,and the ME level of their diets were 12.15(groups 1 and 6),12.35(groups 2 and 7),12.55(groups 3 and 8),12.75(groups 4 and 9)and 12.95 MJ/kg(groups 5 and 10).The pre-test period was 7 days and the formal test pe-riod was 35 days.The results showed as follows:1)the average daily gain(ADG)of Langya chicken roosters was extremely significantly higher in the 12.35 MJ/kg group than the rest of the groups(P＜0.01),was ex-tremely significantly higher in the 12.55 MJ/kg group than the 12.15,12.75 and 12.95 MJ/kg groups(P＜0.01),and was extremely significantly higher in the 12.15 and 12.75 MJ/kg groups than the 12.95 MJ/kg groups(P＜0.01);the average daily feed intake(ADFI)of Langya chicken roosters did not differ significant-ly among groups(P＞0.05),and the feed-to-gain ratio(F/G)of Langya chicken roosters was extremely sig-nificantly higher in the 12.15 MJ/kg group than the 12.35 and 12.55 MJ/kg groups(P＜0.01).The ADFI of Langya chicken hens was extremely significantly higher in the 12.35 MJ/kg group than the 12.95 MJ/kg group(P＜0.01),the ADG was extremely significantly higher in the 12.35 MJ/kg group than the rest of the groups(P＜0.01),and was extremely significantly higher in the 12.15 and 12.55 MJ/kg groups than the 12.95 MJ/kg group(P＜0.01);the F/G was extremely significantly higher in the 12.95 MJ/kg group than the 12.35 and 12.55 MJ/kg groups(P＜0.01).The regression equation of dietary ME level with F/G of Langya chicken roosters was Y=1.362X2-33.928X+215.4 and with ADG was Y=-7.442 5X2+185.26X-1 133.4.The regression equation of dietary ME level with F/G of Langya chicken hens was Y=0.958 3X2-23.769X+151.76 and with ADG was Y=-4.278 7X2+106.03X-643.33.From the regression equation,Langya chicken roosters had the best F/G at a dietary ME level of 12.46 MJ/kg and the best ADG at a dietary ME level of 12.45 MJ/kg.The best F/G was at dietary ME level of 12.40 MJ/kg and the best ADG was at dietary ME lev-el of 12.39 MJ/kg for Langya chicken hens.2)There were no significant differences among the groups of Langya chicken roosters in slaughter rate,half-eviscerated rate,full-eviscerated rate,breast muscle rate and thigh muscle rate(P＞0.05),and the abdominal fat rate was extremely significantly higher in the 12.75 and 12.95 MJ/kg groups than the 12.15 MJ/kg group(P＜0.01).There were no significant differences among the groups of Langya chicken hens in slaughter rate,half-eviscerated rate,full-eviscerated rate,breast muscle rate and thigh muscle rate(P＞0.05),and the abdominal fat rate was significantly higher in the 12.95 MJ/kg group than the 12.15 MJ/kg group(P＜0.05).There were no significant differences in breast muscle pH45min,pH24 h,drip loss rate,cooking loss rate,lightness(L*)value,redness(a*)value and yellowness(b*)val-ue of Langya chicken roosters among groups(P＞0.05),and the shear force was extremely significantly higher in the 12.95 MJ/kg group than the 12.15,12.35 and 12.35 MJ/kg groups(P＜0.01).There were no signifi-cant differences in breast muscle pH45 min,pH24 h,drip loss rate,cooking loss rate,L*value,a*value and b*value of Langya chicken hens among all groups(P＞0.05),and the shear force was significantly higher in the 12.95 MJ/kg group than the 12.15 MJ/kg group(P＜0.05).In conclusion,combined with regression analy-sis,the appropriate dietary ME level of meat strain Langya chicken aged from 84 to 119 days is 12.45 MJ/kg for roosters and is 12.40 MJ/kg for hens.[Chinese Journal of Animal Nutrition,2025,37(2):987-998]关键词
代谢能/琅琊鸡/生长性能/屠宰性能/肉品质Key words
metabolizable energy/Langya chickens/growth performance/slaughter performance/meat quality分类
农业科技引用本文复制引用
曲治翰,龚相维,史雪萍,张柏林,程群,曹顶国,王述柏..饲粮代谢能水平对84～119日龄肉用品系琅琊鸡生长性能、屠宰性能、肉品质的影响[J].动物营养学报,2025,37(2):987-998,12.基金项目
青岛市产业培育计划科技惠民专项(20230166) （20230166）
山东省鲁渝协作项目(23-2-8-cspz-1-nsh) （23-2-8-cspz-1-nsh）
山东省家禽产业技术体系(SDAIT-11-14) （SDAIT-11-14）
山东省农业重大技术协同推广项目(SDNYXTTG-2024-024) （SDNYXTTG-2024-024）
