饲粮铜源及水平对育成期雄性水貂生长性能、营养物质表观消化率及氮、铜代谢的影响  

Effects of Dietary Copper Sources and Levels on Growth Performance,Nutrient Apparent Digestibility and Copper and Nitrogen Metabolism of Male Minks in Late Growing Period

作　　者：吴学壮[1,2] 高秀华[1] 杨福合[2] 张铁涛[2] 崔虎[1] 刘志[1] 郭俊刚[1] 邢秀梅[2] 

机构地区：[1]中国农业科学院饲料研究所,北京100081 [2]中国农业科学院特产研究所,吉林省特种经济动物分子生物学省部共建重点实验室,长春130112

出　　处：《动物营养学报》2015年第3期795-803,共9页CHINESE JOURNAL OF ANIMAL NUTRITION

基　　金：国家自然资源平台专项"特种经济动物种质资源共享平台"(2005DKA21102)

摘　　要：本试验旨在研究饲粮铜源及水平对育成期雄性水貂生长性能、营养物质表观消化率及氮、铜代谢的影响。采用3×3+1双因素试验设计,设3种铜源(硫酸铜、碱式氯化铜、蛋氨酸铜)和3个铜添加水平(10、25、40 mg/kg),1个对照组。选择60日龄健康、体重接近的美国短毛黑雄性水貂120只,随机分成10组,每组12个重复,每个重复1只貂。预试期7 d,正试期45 d。结果表明:1)水貂的平均日采食量随饲粮铜添加水平的增加呈极显著线性增加(P<0.01),并且平均日增重随饲粮铜添加水平的增加也呈线性增加(P=0.053)。2)水貂的粗脂肪表观消化率随饲粮铜添加水平的增加呈极显著线性增加(P<0.01),并且粗蛋白质表观消化率随饲粮铜添加水平的增加也呈显著线性增加(P<0.05)。3)水貂铜摄入量、粪铜排泄量、尿铜排泄量以及铜沉积量均随饲粮铜添加水平的增加呈极显著线性增加(P<0.01),然而铜的表观吸收率却随饲粮铜添加水平的增加呈极显著线性降低(P<0.01)。水貂对碱式氯化铜和蛋氨酸铜的表观吸收率极显著高于对硫酸铜的表观吸收率(P<0.01)。水貂氮沉积量随饲粮铜添加水平的增加而呈显著线性增加(P<0.05)。由此可见,基础饲粮中铜含量为8.05 mg/kg时,饲粮添加40 mg/kg的铜能改善育成期雄性水貂生长性能,提高水貂粗脂肪表观消化率;育成期雄性水貂对碱式氯化铜和蛋氨酸铜的表观吸收率高于对硫酸铜的表观吸收率。This experiment was conducted to study the effects of dietary copper sources and levels on growth performance, nutrient apparent digestibility and copper and nitrogen metabolism of male minks in late growing period. The experiment was used in a 3 × 3＋1 factorial experiment based on a completely randomized design, minks in the control group were fed a basal diet, and minks in other nine groups were fed the basal diets sup-plemented with 3 sources （ copper sulfate, tribasic copper chloride and copper methionine） and 3 levels （ 10, 25, and 40 mg/kg） . The pre-test period lasted for 7 days, and the trial lasted for 45 days. The results showed as follows：1） the average daily feed intake of minks was significantly linear increased with dietary copper sup-plemental level increased （ P〈0.01） , and average daily gain of minks was linear increased with dietary copper supplemental level increased （P=0.053）. 2） The apparent digestibility of ether extract and crude protein of minks was significant linear increased with dietary copper supplemental level increased （ P〈0.01 or P〈0.05） . 3） The copper intake, fecal copper excretion, Urinary copper excretion and copper retention of minks were significant linear increased with dietary copper supplemental level increased （ P〈0.01） , but the copper appar-ent absorption was significant linear decreased with dietary copper supplemental level increased （ P〈0.01） . The tribasic copper chloride and copper methionine apparent absorption of minks was significantly higher than cop-per sulfate apparent absorption （P〈0.05）. The nitrogen retention was significant linear increased with dietary copper supplemental level increased （ P〈0.05） . In conclusion, when copper content is 8.05 mg/kg in the basal diet, dietary supplemented with 40 mg/kg copper can improve growth performance of minks in late growing period, and improve the ether extract apparent digestibility. Tribasic copper chloride and copper methionate ap-parent absorption of m

关 键 词：水貂 蛋氨酸铜 碱式氯化铜 硫酸铜 生长性能 营养物质表观消化率 

分 类 号：S816.7[农业科学—饲料科学]