摘要
本试验通过间接测热法结合套算法测定爱拔益加(AA)肉鸡对不同玉米干酒糟及其可溶物(DDGS)原料的有效能值并建立基于营养成分含量的净能预测模型。选取24日龄体重为(1150±30)g的AA肉鸡60只,随机分为5个组(1个玉米-豆粕型基础饲粮组和4个玉米DDGS替代比例为20%的试验饲粮组),每组6个重复,每个重复2只鸡。试验周期为7 d,其中预试期3 d,27日龄时转入呼吸测热室适应1 d,28~31日龄为3 d正试期。结果表明:1)28~31日龄肉鸡对4种玉米DDGS原料的表观代谢能分别为16.05、18.73、18.73和18.36 MJ/kg DM,净能分别为12.52、15.18、14.74和12.86 MJ/kg DM,净能/表观代谢能分别为78.88%、80.86%、79.43%和69.08%。2)肉鸡玉米DDGS原料净能预测方程为:净能=12.455-0.359×粗脂肪+0.425×粗纤维(R2=0.999,P<0.01)。用交叉验证法验证常规营养成分含量的预测方程,预测值与实测值几乎接近且变异系数小,表明本研究建立的肉鸡玉米DDGS净能预测模型较为成功。
In this study,the effective energy values of different corn distillers dried grains with solubles(DDGS)in Arbor Acre(AA)broilers were determined by indirect calorimetry combined with substitution method,and the net energy prediction model was established based on nutrient contents of corn DDGS.A total of 60 AA broilers of 24⁃day⁃old with body weight of(1150±30)g were randomly divided into 5 groups(in⁃cluding 1 corn⁃soybean meal type basal diet group and 4 experimental diet groups with 20%replacement ratio of corn DDGS)with 6 replicates per group and 2 broilers per replicate.The trial period lasted for 7 days,and the pre⁃trial period lasted for 3 days.At 27 days of age,the broilers were transferred to the respiratory calorim⁃etry chamber for 1 day,and the formal trial period of 3 days began at 28 days of age.The results showed as follows:1)the apparent metabolizable energy of the four corn DDGS in broilers aged from 28 to 31 days was 16.05,18.73,18.73 and 18.36 MJ/kg DM,the net energy was 12.52,15.18,14.74 and 12.86 MJ/kg DM,and the net energy/apparent metabolizable energy were 78.88%,80.86%,79.43%and 69.08%,respectively.2)The net energy prediction equation of corn DDGS in broilers was net energy=12.455-0.359×ether extract+0.425×crude fibre(R2=0.999,P<0.01).Cross⁃validation method was used to verify the prediction equation of conventional nutrient contents,and the predicted values were close to the measured values with small coeffi⁃cient of variation.The results indicate that the net energy prediction model of corn DDGS in broilers established in this study is successful.
作者
徐莹
班志彬
呙于明
陈思淼
梁浩
赵晓东
李柏浩
燕磊
XU Ying;BAN Zhibin;GUO Yuming;CHEN Simiao;LIANG Hao;ZHAO Xiaodong;LI Baihao;YAN Lei(State Key Laboratory of Animal Nutrition,College of Animal Science and Technology,China Agricultural University,Beijing 100193,China;Institute of Animal Nutrition and Feed,Jilin Academy of Agricultural Sciences,Gongzhuling 136100,China;New Hope Liuhe Group Co.,Ltd.,Qingdao 266000,China)
出处
《动物营养学报》
CAS
CSCD
北大核心
2024年第5期2948-2957,共10页
CHINESE JOURNAL OF ANIMAL NUTRITION
基金
国家重点研发计划资助(2021YFD1300404)
家禽能量营养联合研究中心横向委托鸡饲料原料净能评价及数据库建立项目(PENC2021001)。
关键词
肉鸡
玉米DDGS
净能
预测方程
broilers
corn DDGS
net energy
prediction equation
