作 者：
万春孟;张铁涛;吴学壮;刘志;郭俊刚;高秀华;杨福合;邢秀梅;岳志刚
单 位：
中国农业科学院特产研究所;中国农业科学院饲料研究所
关键词：
育成期;水貂;生长性能;营养物质消化率;氮代谢
摘 要：
本试验旨在研究饲粮L-精氨酸添加水平对育成期水貂生长性能、营养物质消化率及氮代谢的影响。选取(60±3)日龄健康雌性水貂70只,随机分成7组,每组10个重复,每个重复1只水貂。7组水貂分别饲喂在基础饲粮(L-精氨酸含量为1.45%)基础上添加0(Ⅰ组)、0.2%(Ⅱ组)、0.4%(Ⅲ组)、0.6%(Ⅳ组)、0.8%(Ⅴ组)、1.0%(Ⅵ组)和1.2%(Ⅶ组)L-精氨酸的试验饲粮。预试期7 d,正试期60 d。结果表明:Ⅲ组的末重、平均日增重和料重比高于其他各组,但差异不显著(P>0.05)。Ⅲ组的干物质采食量极显著高于Ⅰ组(P<0.01),显著高于Ⅱ组和Ⅵ组(P<0.05)。Ⅲ组的干物质排出量显著高于Ⅰ组和Ⅳ组(P<0.05)。Ⅳ组的干物质消化率高于其他各组,但差异不显著(P>0.05)。Ⅳ组的蛋白质消化率显著高于Ⅰ组、Ⅱ组、Ⅲ组、Ⅴ组和Ⅶ组(P<0.05)。Ⅳ组的脂肪消化率显著高于Ⅴ组、Ⅵ组和Ⅶ组(P<0.05)。Ⅲ组的食入氮极显著高于Ⅰ组和Ⅱ组(P<0.01),显著高于Ⅴ组和Ⅵ组(P<0.05)。Ⅲ组的粪氮极显著高于Ⅰ组和Ⅳ组(P<0.01)。Ⅲ组的氮沉积极显著高于Ⅰ组和Ⅵ组(P<0.01),显著高于Ⅱ组和Ⅴ组(P<0.05)。Ⅲ组和Ⅳ组的净蛋白质利用率显著高于Ⅰ组(P<0.05)。Ⅲ组和Ⅳ组的蛋白质生物学价值显著高于Ⅰ组(P<0.05)。由此得出,饲粮L-精氨酸添加水平为0.4%~0.6%(L-精氨酸总含量为1.85%~2.05%)时,育成期水貂的生长性能、营养物质消化率、氮沉积、净蛋白质利用率及蛋白质生物学价值较为理想。
译 名：
Effects of Dietary L-Arginine Supplemental Level on Growth Performance,Nutrient Digestibility and Nitrogen Metabolism of Mink during Growing Period
作 者：
WAN Chunmeng;ZHANG Tietao;WU Xuezhuang;LIU Zhi;GUO Jungang;GAO Xiuhua;YANG Fuhe;XING Xiumei;YUE Zhigang;Institute of Feed Research,Chinese Academy of Agriculture Sciences;State Key Laboratory of Special Animal Molecular Biology,Institute of Economic Animal and Plant Science ,Chinese Academy of Agriculture Sciences;
关键词：
growing period;;mink;;growth performance;;nutrient digestibility;;nitrogen metabolism
摘 要：
This study was conducted to study the effects of dietary L-arginine(L-Arg) supplemental level on growth performance,nutrient digestibility and nitrogen metabolism of growing mink.Seventy healthy female mink at the age of 60-day were randomly divided into 7 groups with 10 replicates each and 1 mink per replicate.The mink in 7 groups were fed the basal diet(L-Arg content was 1.45%) supplemented with 0(group Ⅰ),0.2%(group Ⅱ),0.4%(group Ⅲ),0.6%(group Ⅳ),0.8%(group Ⅴ),1.0%(group Ⅵ) and 1.2%(group Ⅶ) L-Arg,respectively.The pre-test period lasted for 7 days and the trial lasted for 60 days.The results showed as follows: the final weight,average daily gain and feed/gain of the group Ⅲ were higher than those of the other groups,but the differences were not significant(P > 0.05).The dry matter(DM) intake of the groupⅢ was extremely significantly higher than that of the group Ⅰ(P < 0.01) and it was significantly higher than that of groups Ⅱ and Ⅵ(P < 0.05).The DMoutput of the group Ⅲ was significantly higher than that of groups Ⅰ and Ⅳ(P < 0.05).The DMdigestibility of the group Ⅳ was higher than that of the other groups,but the difference was not significant(P > 0.05).The protein digestibility of the group Ⅳ was significantly higher than that of groups Ⅰ,Ⅱ,Ⅲ,Ⅴ and Ⅶ(P < 0.05).The fat digestibility of the group Ⅳ was significantly higher than that of groups Ⅴ,Ⅵ and Ⅶ(P < 0.05).Nitrogen intake of the group Ⅲ was extremely significantly higher than that of groups Ⅰ and Ⅱ(P < 0.01) and it was significantly higher than that of groups Ⅴand Ⅵ(P < 0.05).The fecal nitrogen of the group Ⅲ was extremely significantly higher than that of groups Ⅰand Ⅳ(P < 0.01).The nitrogen deposition of the group Ⅲ was extremely significantly higher than that of groups Ⅰ and Ⅵ(P < 0.01) and it was significantly higher than that of groups Ⅱ and Ⅴ(P < 0.05).Net protein utilization of groups Ⅲ and Ⅳ was significantly higher than that of the group Ⅰ(P < 0.05).Biological value of protein of groups Ⅲ and Ⅳ was significantly higher than that of the group Ⅰ(P < 0.05).In conclusion,when the dietary L-Arg supplemental level is 0.4% to 0.6%(L-Arg total content is 1.85% to 2.05%),the growth performance,nutrient digestibility,nitrogen metabolism,net protein utilization and biological value of protein of growing mink are optimal.
