小麦麸生长猪消化能和代谢能的测定及预测模型的建立  

Determination and Prediction Model Establishment of Digestible Energy and Metabolizable Energy of Wheat Bran for Growing Pigs

作　　者：蒋线吉 李瑞 冯淦熠 田明洲 向强 杨刚 刘小杰[1,2] 欧阳晴 唐辉 龙次民 黄瑞林[2] 印遇龙[1,2] JIANG Xianji;LI Rui;FENG Ganyi;TIAN Mingzhou;XIANG Qiang;YANG Gang;LIU Xiaojie;OUYANG Qing;TANG Hui;LONG Cimin;HUANG Ruilin;YIN Yulong(Hunan Co-Innovation Center of Animal Production Safety,College of Animal Science and Technology,Hunan Agricultural University,Changsha 410128,China;Key Laboratory of Animal Nutritional Physiology and Metabolic Process,National Engineering Laboratory for Poultry Breeding Pollution Control and Resource Technology,Key Laboratory of Agro-Ecological Processes in Subtropical Region,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China)

机构地区：[1]湖南农业大学动物科学技术学院,湖南畜禽安全生产协同创新中心,长沙410128 [2]中国科学院亚热带农业生态研究所,中国科学院亚热带农业生态过程重点实验室,畜禽养殖污染控制与资源化技术国家工程实验室,动物营养生理与代谢过程湖南省重点实验室,长沙410125

出　　处：《动物营养学报》2023年第12期7680-7690,共11页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：国家重点研发计划(2021YFD1300201,2021YFD1301004);云南省重大科技专项计划(202202AE090032);湖南省自然科学基金项目(2022JJ40532)。

摘　　要：本试验测定了小麦麸的化学成分以及小麦麸生长猪消化能(DE)和代谢能(ME),并建立了基于小麦麸有效化学成分含量的DE和ME预测模型。采用2个11×3的不完全拉丁方设计,即2个平行试验、11种饲粮(1种基础饲粮+10种小麦麸饲粮)、3个周期,选取22头健康的“杜×长×大”三元杂交阉公猪[(35±3)kg]进行消化代谢试验,每个周期12 d(7 d适应期,5 d粪尿收集期)。结果显示:风干基础下,10种小麦麸的总能(GE)平均值为16.59 MJ/kg(16.22~16.79 MJ/kg),干物质(DM)、粗蛋白质(CP)、粗灰分(Ash)、粗脂肪(EE)、钙(Ca)、总磷(TP)、粗纤维(CF)、中性洗涤纤维(NDF)、酸性洗涤纤维(ADF)和总淀粉(TS)含量平均值分别为87.46%(86.07%~87.82%)、15.88%(14.56%~16.83%)、5.48%(5.03%~6.02%)、4.37%(3.30%~5.69%)、0.11%(0.08%~0.14%)、1.04%(0.94%~1.15%)、10.72%(8.70%~12.79%)、44.24%(38.15%~49.73%)、10.76%(8.05%~12.27%)和19.19%(16.14%~22.73%)。其中,EE、Ca、CF、ADF含量的变异系数(CV)均大于10%,GE与DM、CP、Ash、TP、NDF、TS含量的CV均小于10%。10种小麦麸对生长猪的DE和ME平均值分别为10.61(10.18~10.97 MJ/kg)和9.99 MJ/kg(9.47~10.48 MJ/kg);小麦麸对生长猪DE和ME的最佳预测模型分别为DE=9.569+0.237EE[相对标准偏差(RSD)=0.19,决定系数(R^(2))=0.498,P<0.05]和ME=8.779+0.278EE(RSD=0.15,R^(2)=0.719,P<0.01)。由此可见,10种小麦麸间的化学成分含量整体上变异度较小,EE含量可作为小麦麸生长猪DE和ME的关键预测因子。The experiment was performed to detect the chemical components in wheat bran,the digestible energy(DE)and metabolizable energy(ME)of wheat bran for growing pigs,and the prediction models of DE and ME for growing pigs was established based on the contents of effective chemical components in wheat bran.Twenty-two healthy“Duroc×Landrance×Yorkshire”crossbred boars with average initial body weight of(35±3)kg were selected for digestive and metabolic experiment according to a replicated 11×3 incomplete Latin square design,including two parallel trials,11 diets(1 basal diet+10 wheat bran diets)and 3 cycles.Each cycle had 12 days consisting of 7 d for adaptation and 5 d for fecal and urine collection.The results showed that,on the air-dry basis,the average gross energy(GE)of 10 wheat brans was 16.59 MJ/kg(16.22 to 16.79 MJ/kg),and the average contents of dry matter(DM),crude protein(CP),crude ash(Ash),ether extract(EE),calcium(Ca),total phosphorus(TP),crude fiber(CF),neutral detergent fiber(NDF),acid detergent fiber(ADF)and total starch(TS)of 10 wheat brans were 87.46%(86.07%to 87.82%),15.88%(14.56%to 16.83%),5.48%(5.03%to 6.02%),4.37%(3.30%to 5.69%),0.11%(0.08%to 0.14%),1.04%(0.94%to 1.15%),10.72%(8.70%to 12.79%),44.24%(38.15%to 49.73%),10.76%(8.05%to 12.27%)and 19.19%(16.14%to 22.73%),respectively.The coefficients of variation(CV)of EE,Ca,CF and ADF contents were greater than 10%,while the CV of GE,DM,CP,Ash,TP,NDF and TS contents were less than 10%.The average DE and ME of 10 wheat brans for growing pigs were 10.61(10.18 to 10.97 MJ/kg)and 9.99 MJ/kg(9.47 to 10.48 MJ/kg),respectively.The optimal prediction models of DE and ME of wheat bran for growing pigs were DE=9.569+0.237EE[relative standard deviation(RSD)=0.19,determination coefficient(R^(2))=0.498,P<0.05]and ME=8.779+0.278EE(RSD=0.15,R^(2)=0.719,P<0.01),respectively.In conclusion,the variation degree of chemical component contents of wheat bran is small on the whole,and EE content can be used as key predictor of DE and ME of wheat bran for growing pigs.

关 键 词：小麦麸 生长猪 消化能 代谢能 预测方程 

分 类 号：S816[农业科学—饲料科学]