作 者：
ZHANG Haihua;LI Guangyu;REN Erjun;XING Xiumei;LIANG Dong;WU Qiong;YANG Fuhe
单 位：
Institute of Special Economic Animal and Plant Sciences
关键词：
minks;protein levels;fur characteristics;growth performance;serum biochemical parameters
摘 要：
The study investigated the effects of different dietary protein levels on growth performance,nutrient digestion and absorption,fur characteristics,as well as serum biochemical parameters in growing-furring minks.Seventy healthy male minks were subjected to5experimental dietary protein treatments as P32,P28,P24,P20 and P16[32%,28%,24%,20% and16% crude protein (CP),respectively],and the measured protein contents of the diets were326.4,284.7,249.3,203.9and172.8g/kg dry matter (DM),respectively.The results showed that from mid-September to pelting,the digestibility of CP declined with the dietary protein level reducing (P<0.01); digestibility of ether extract in treatment P16was significantly lower than that in the other groups (P<0.01); nitrogen (N)intake,urinary N excretion and N retention increased linearly with the dietary protein level increasing; serum urea nitrogen decreased linearly with the dietary protein level declining (P< 0.05); there was no significant difference in serumtotal protein among all groups (P>0.05); body length,skin length and dry skin weight declined along with the decrease of dietary protein level; and the length of guard-fur and under-fur were not affected by different dietary protein levels (P>0.05).Considering all the factors,the level of dietary protein should be at about284.7g/kg DM,and244.5g/kg (DM basis)digestible protein could meet the requirement of minks in growing-furring period.Furthermore,the urinary N could be decreased by22.45% in this period when dietary protein level declined from32% to28%,which would be beneficial to reduce the feed costs and lower nitrogen emissions to the environment.
译 名：
饲粮蛋白质水平对冬毛生长期水貂生长性能、血清生化指标及毛皮质量的影响
作 者：
ZHANG Haihua(1);;LI Guangyu(1);;REN Erjun(1);;XING Xiumei(1);;LIANG Dong(1);;WU Qiong(1);;YANG Fuhe(1)
单 位：
(1)Institute of Special Economic Animal and Plant Sciences,The Chinese Academy of Agricultural Sciences, Jilin Provincial Key Laboratory for Molecular Biology of Special Economic Animals;;;;State Key Laboratory for Molecular Biology of Special Economical Animals, Jilin, 132109
摘 要：
本文旨在探讨饲粮蛋白质水平对水貂生长性能、营养物质消化吸收、毛皮品质和血清生化指标的影响。随机选取日龄体重相近的70只健康公水貂平均分至5组,饲喂5个蛋白质水平的饲粮(32%、28%、24%、20%和16%),每千克干物质中含蛋白质分别为326.4、284.7、 249.3、203.9和172.8g。试验组编号分别为P32、P28、P24、P20和P16。从9月中旬至取皮,粗蛋白质的消化率随饲粮蛋白质水平的下降而降低(P<0.01);P16处理中粗脂肪消化率显著低于其他处理(P<0.01);日氮食入量、日尿氮排出量和日氮沉积量随饲粮蛋白质水平的增加呈线性增加;血清尿素氮随饲粮蛋白质水平的降低而显著下降(P<0.05),而饲粮蛋白质水平对血清总蛋白质的影响各组间差异不显著(P>0.05);各组中水貂的体长、皮长和干皮重随饲粮蛋白质水平的降低而呈下降趋势;饲粮蛋白质水平对水貂针毛和绒毛的长度影响差异不显著(P> 0.05)。综合考虑各项指标,饲粮蛋白质水平为284.7g/kg干物质,可消化蛋白质水平为 244.5g/kg干物质时,能够满足冬毛生长期水貂正常生产的需要。并且,当饲粮蛋白质水平从 32%降低到28%时,水貂尿氮排放量可降低22.45%。因此,合理降低饲粮蛋白质水平不仅节约了饲养成本,而且减轻了氮排泄对环境造成的污染。
