Effect of low-protein diet with supplementing different levels of DL-methionine on production performance of minks in growing-furring period

作     者：ZHANG Hai-hua LI Guang-yu XING Xiu-mei REN Er-jun YANG Ying YANG Fu-he Institute of Special Economic Animal and Plant Sciences, Chinese Academy of Agricultural Sciences, Jilin 132109, P. R. China Jilin Provincial Key Laboratory for Molecular Biology of Special Economic Animals, Jilin 132109, P. R. China State Key Laboratory for Molecular Biology of Special Economical Animals, Jilin 132109, P. R. China 

作者机构：Institute of Special Economic Animal and Plant Sciences Chinese Academy of Agricultural Sciences Jilin P. R. China Jilin Provincial Key Laboratory for Molecular Biology of Special Economic Animals Jilin P. R. China State Key Laboratory for Molecular Biology of Special Economical Animals Jilin P. R. China 

出 版 物：《Journal of Forestry Research》 (林业研究（英文版）)

年 卷 期：2012年第23卷第1期

页      面：151-155页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 0907[农学-林学] 1002[医学-临床医学] 100210[医学-外科学(含：普外、骨外、泌尿外、胸心外、神外、整形、烧伤、野战外)] 0829[工学-林业工程] 0901[农学-作物学] 10[医学] 

基　　金：supported by Special Fund for Public Welfare Technology Research of Agricultural Industry (200903014) 

主　　题：minks low-protein diet DL-methionine fur characteristics 

摘      要：A study was conducted to evaluate production performance of minks in growing-furring period with supplementing DL-Methinnine （Met） in low protein diet. Seventy healthy male minks were randomly divided into five groups of 14 minks each. The minks were fed in five kinds of experiment diets （HP, LP, LP＋M1, LP＋M2 and LP＋M3）. The dietary protein levels, expressed as percentage of dry matter （DM）, were 32% （high protein, HP） and 24% （low protein, LP）. LP was supple- mented with Met 0.4% （M1）, 0.8% （M2） and 1.2% （M3） DM. From mid of September to December 10, apparent digestibility of CP （crude pro- tein）, N intake and urinary N excretion were decreased with declining dietary protein levels （p 〈 0.05） and N retained was the highest in treat- ment LP＋M2. No significant difference was found in total serum protein （TP） and serum urea nitrogen （SUN） among all treatment groups （p 〉 0.05）. Skin length of treatment HP and LP^M2 was higher than that of other groups （p 〈 0.05）. Body length, skin weight, length of guard hair and under hair were not affected by different dietary protein levels （p〉0.05）. The best performance could be observed in treatment LP＋M2. In diet, 24% （DM） protein level with 1.54% Met supplementing was enough for minks during growing-farring period. Dietary protein lowered from 32% to 24% with supplementing Met in diets would result in a37.9% decrease in urinary N excretion. Furthermore, addition of Met in diets for minks would be beneficial in terms of reducing feed expenses and lessening nitrogen emissions to the environment.