小麦麸生长猪氨基酸消化率的测定及预测模型的建立  

Determination and Prediction Model Establishment of Amino Acid Digestibility of Wheat Bran for Growing Pigs

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

机构地区：[1]中国科学院亚热带农业生态研究所,动物营养生理与代谢过程湖南省重点实验室,畜禽养殖污染控制与资源化技术国家工程实验室,中国科学院亚热带农业生态过程重点实验室,长沙410125 [2]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

出　　处：《动物营养学报》2024年第6期3573-3586,共14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：本试验测定了生长猪的氨基酸表观回肠消化率(AID)和标准回肠消化率(SID),并基于小麦麸有效化学成分含量构建了氨基酸的SID预测模型。选取22头“杜×(长×大)”生长猪[体重(34.3±4.3)kg],在其回肠末端安装“T”型瘘管,按照2个“11×3”的不完全拉丁方设计,分别饲喂1个无氮饲粮和10个小麦麸饲粮,每个处理共计6个重复,试验共3个连续周期,每期7 d,包括5 d的预饲期和2 d回肠食糜收集期。结果显示:饲喂基础下,10个小麦麸的赖氨酸(L_(ys))、蛋氨酸(M_(et))、苏氨酸(T_(hr))和色氨酸(T_(rp))含量的平均值分别为0.93%(0.76%~1.19%)、0.31%(0.27%~0.40%)、0.53%(0.46%~0.62%)和0.17%(0.13%~0.23%),变异系数(CV)分别为19.19%、14.19%、11.70%和8.32%;生长猪对10个小麦麸AID_(Lys)、AID_(Met)、AID_(Thr)、AID_(Trp)的平均值分别为67.03%(56.09%~75.72%)、50.96%(42.93%~56.68%)、45.91%(38.26%~52.29%)和76.55%(73.30%~81.65%),SIDLys、SIDMet、SIDThr、SIDTrp的平均值分别为82.36%(73.21%~90.05%)、76.68%(73.39%~81.55%)、60.99%(53.14%~65.67%)和88.79%(86.21%~92.03%)。SID_(Lys)、SID_(Met)最佳预测方程分别为:SID_(Lys)=128.691+312.567×钙(Ca)-14.555×粗灰分(A_(sh))(R^(2)=0.687);SID_(Met)=86.306-2.201×粗脂肪(EE)(R^(2)=0.490)。由上可知,本试验中的10个小麦麸氨基酸组成差异较大,EE、Ca和A_(sh)含量可作为生长猪小麦麸SID_(Lys)和SID_(Met)的关键预测因子。In this experiment,the apparent ileal digestibility(AID)and standardized ileal digestibility(SID)of amino acids of wheat bran for growing pigs were determined,and predictive models for SID of amino acids based on the contents of effective chemical components in wheat bran were established.Twenty-two“Duroc×(Landrace×Large)”growing pigs[body weight of(34.3±4.3)kg]were selected and fitted with T-shaped fistulas at the end of their ileum.According to two incomplete Latin square designs of“11×3”,the pigs in each treatment were fed a nitrogen-free diet and 10 wheat bran diets,respectively,for 3 consecutive cycles,each period lasted for 7 days.It included 5 days pre-feeding period and 2 days ileal digesta collection period.The results showed that,on as-fed basis,the average contents of lysine(Lys),methionine(Met),threonine(Thr)and tryptophan(Trp)in ten wheat bran were 0.93%(0.76%to 1.19%),0.31%(0.27%to 0.40%),0.53%(0.46%to 0.62%)and 0.17%(0.13%to 0.23%),with coefficients of variation(CV)of 19.19%,14.19%,11.70%and 8.32%,respectively.The average AID Lys,AID Met,AID Thr and AID Trp of ten wheat bran for growing pigs were 67.03%(56.09%to 75.72%),50.96%(42.93%to 56.68%),45.91%(38.26%to 52.29%)and 76.55%(73.30%to 81.65%),and the average SID_(Lys),SID_(Met),SID_(Thr)and SID_(Trp)were 82.36%(73.21%to 90.05%),76.68%(73.39%to 81.55%),60.99%(53.14%to 65.67%)and 88.79%(86.21%to 92.03%),respectively.The optimal prediction equations of SID Lys and SID_(Met)were as follows:SID_(Lys)=128.691+312.567×calcium(Ca)-14.555×crude ash(Ash)(R^(2)=0.687);SID_(Met)=86.306-2.201×ether extract(EE)(R^(2)=0.490).In summary,the amino acid composition of the 10 wheat bran in this experiment has visible difference,and EE,Ca and Ash contents can be used as key predictors of the SID Lys and SID Met of wheat bran for growing pigs.

关 键 词：小麦麸 生长猪 氨基酸消化率 预测模型 

分 类 号：S816[农业科学—饲料科学]