生长育肥猪木薯氨基酸消化率测定及预测模型建立  

Determination and Prediction Model Establishment of Amino Acid Digestibility of Cassava for Growing-Finishing Pigs

作　　者：杨刚[1,2] 李瑞 冯淦熠 向强 田明洲 蒋线吉 刘小杰 黄瑞林 印遇龙[1,2] YANG Gang;LI Rui;FENG Ganyi;XIANG Qiang;TIAN Mingzhou;JIANG Xianji;LIU Xiaojie;HUANG Ruilin;YIN Yulong(Key Laboratory of Agro-Ecological Processes in Subtropical Region of Chinese Academy of Sciences,National Engineering Laboratory for Poultry Breeding Pollution Control and Resource Technology,Key Laboratory of Animal Nutritional Physiology and Metabolic Process of Hunan,Institute of Subtropical Agriculture,Chinese Academy of Sciences,Changsha 410125,China;Hunan Co-Innovation Center of Animal Production Safety,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,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 [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》2022年第8期4892-4903,共12页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：国家重点研发计划(2021YFD1300201,2021YFD1301004);农业农村部项目“生长育肥猪常用能量饲料原料营养价值评定与参数建立”(16190298,16200142,20210406);湖南省科技创新计划资助项目(2020RC2063);中国科学院亚热带农业生态过程重点实验室开放基金项目(ISA2021103)。

摘　　要：本试验旨在测定生长育肥猪木薯的氨基酸表观回肠消化率(AID)和标准回肠消化率(SID),并基于木薯常规营养成分含量建立生长育肥猪必需氨基酸SID的预测模型。选取健康、体重为(36.0±1.4) kg的“杜×长×大”瘘管猪22头,采用2个11×3的不完全拉丁方设计,分别饲喂1种无氮饲粮和10种木薯试验饲粮。结果表明:风干基础下,木薯赖氨酸(Lys)、蛋氨酸(Met)、苏氨酸(Thr)、色氨酸(Trp)含量分别为0.09%~0.24%、0.01%~0.03%、0.05%~0.11%、0.04%~0.07%;10个不同来源木薯中,以产自广西玉林和广西来宾的木薯大部分氨基酸含量较高。生长育肥猪对木薯的AID_(Lys)、AID_(Met)、AID_(Thr)、AID_(Trp)分别为54.21%~87.96%、41.33%~84.95%、31.67%~73.14%、74.40%~91.12%,对木薯的SID_(Lys)、SID_(Met)、SID_(Thr)、SID_(Trp)分别为69.20%~95.53%、69.62%~97.81%、73.04%~95.44%、84.50%~96.20%。本试验建立了生长育肥猪对木薯SID_(Trp)、SID_(Arg)、SID_(Leu)、SID_(Val)、SID_(Phe)的预测模型,涉及的关键预测因子包括粗蛋白质(CP)、粗灰分(Ash)、干物质(DM)及中性洗涤纤维(NDF)含量。This experiment was conducted to determine the apparent ileal digestibility(AID)and standardized ileal digestibility(SID)of amino acids of cassava for growing-finishing pigs,and to develop prediction model for SID of essential amino acids of cassava based on its conventional nutrient contents.Twenty-two healthy Duroc×Landrance×Yorkshire ileal-cannulated pigs with the body weight of(36.0±1.4)kg were randomly selected and assigned to 10 cassava diets and a nitrogen-free diet according to a replicated incomplete Latin square design of 11×3.The results showed that,on the air-dry basis,the contents of lysine(Lys),methionine(Met),threonine(Thr),tryptophan(Trp)in cassava were 0.09%to 0.24%,0.01%to 0.03%,0.05% to 0.11%,0.04% to 0.07%,respectively.Among the cassavas from 10 producing areas,most of amino acids in the cassavas from Yulin and Laibing of Guangxi had higher content.The AID_(Lys),AID_(Met),AID_(Thr),AID_(Trp) of cassava for growing-finishing pigs were 54.21%to 87.96%,41.33%to 84.95%,31.67%to 73.14%,74.40%to 91.12%,respectively,and the SID_(Lys),SID_(Met),SID_(Thr),SID_(Trp) were 69.20%to 95.53%,69.62%to 97.81%,73.04%to 95.44%,84.50%to 96.20%,respectively.The prediction models for SID_(Trp),SID_(Arg),SID_(Leu),SID_(Val) and SID_(Phe) in cassava for growing-finishing pigs are established in this experiment,and the key predicting factors include crude protein(CP),ash(Ash),dry matter(DM)and neutral detergent fiber(NDF)contents.

关 键 词：木薯 生长育肥猪 氨基酸消化率 预测模型 

分 类 号：S828[农业科学—畜牧学]