动物营养学报 >

2015 , Vol. 27 >Issue 8: 2597 - 2606

DOI: https://doi.org/10.3969/j.issn.1006-267x.2015.08.034

研究简报 Short Communications

饲粮铜、锌含量及其互作效应对育成期水貂生长性能、营养物质表观消化率及铜、锌和氮代谢的影响

  • 吴学壮 ,
  • 刘志 ,
  • 郭俊刚 ,
  • 崔虎 ,
  • 万春孟 ,
  • 王忠成 ,
  • 高秀华 ,
  • 杨福合 ,
  • 邢秀梅
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  • 1. 中国农业科学院饲料研究所, 北京 100081;
    2. 遵义师范学院农业科技学院, 遵义 563002;
    3. 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

收稿日期: 2015-03-10

  网络出版日期: 2015-08-13

基金资助

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)

收起

Effects of Dietary Copper and Zinc Contents and Their Interaction on Growth Performance, Nutrient Apparent Digestibility and Copper, Zinc and Nitrogen Metabolism of Growing Mink (Mustela vison)

  • WU Xuezhuang ,
  • LIU Zhi ,
  • GUO Jungang ,
  • CUI Hu ,
  • WAN Chunmeng ,
  • WANG Zhongcheng ,
  • GAO Xiuhua ,
  • YANG Fuhe ,
  • XING Xiumei
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  • 1.Institute of Feed Research, Chinese Academy of Agricultural Sciences, Beijing 100081, China;
    2. School of Agriculture and Technology, Zunyi Normal College, Zunyi 563002, China;
    3. State Key Laboratory for Molecular Biology of Special Economic Animals, Institute of Economic Animal and Plant Science, Chinese Academy of Agricultural Sciences, Changchun 130112, China

Received date: 2015-03-10

  Online published: 2015-08-13

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摘要

本试验旨在研究饲粮铜、锌含量及其互作效应对育成期水貂生长性能、营养物质表观消化率及铜、锌和氮代谢的影响。试验采用3×3完全随机试验设计,分别在基础饲粮(不添加铜、锌)基础上添加3个水平(0、15和30 mg/kg)的铜(以硫酸铜形式)和3个水平(0、150和300 mg/kg)的锌(以硫酸锌形式)。选用(60±3)日龄、体重相近的健康雄性水貂108只,随机分成9组,每组12个重复,每个重复1只。预试期为7 d,正试期为60 d。结果表明:1)饲粮铜含量对水貂平均日增重(P=0.069)和料重比(P=0.058)有影响趋势。以平均日增重为响应指标,通过二次响应面回归模型估测育成期水貂铜、锌适宜含量分别为51和117 mg/kg时,此时水貂可以获得最大平均日增重14.10 g。2)饲粮铜含量对水貂粗脂肪的表观消化率有显著影响(P=0.019),对铜的表观消化率有极显著影响(P=0.001);饲粮锌含量对水貂粗脂肪和铜的表观消化率均没有显著影响(P>0.05);饲粮铜、锌含量的互作效应对水貂粗脂肪的表观消化率没有显著影响(P>0.05),对铜的表观消化率有极显著影响(P=0.002)。3)饲粮铜含量对水貂铜的摄入量、粪铜和尿铜的排出量以及铜沉积量均有极显著影响(P=0.001);饲粮铜、锌含量的互作效应对铜沉积量有显著影响(P=0.019),对粪铜的排出量有极显著影响(P=0.001)。饲粮锌含量对水貂锌的摄入量、粪锌和尿锌的排出量以及锌沉积量均有极显著影响(P=0.001);饲粮铜、锌含量的互作效应对锌代谢指标没有显著影响(P>0.05)。饲粮铜、锌含量以及二者的互作效应对水貂氮代谢指标没有显著影响(P>0.05)。综合试验结果得出,饲粮中铜、锌含量分别为51、117 mg/kg时,育成期水貂可以获得最大平均日增重;饲粮中铜含量为39.83 mg/kg时,育成期水貂对粗脂肪的表观消化率较高,对锌的表观消化率和锌的代谢没有产生显著影响;饲粮锌铜比例大于40时,会降低育成期水貂铜的表观消化率和铜沉积量。

关键词： 铜; 锌; 平均日增重; 营养物质表观消化率; 水貂

本文引用格式

吴学壮 , 刘志 , 郭俊刚 , 崔虎 , 万春孟 , 王忠成 , 高秀华 , 杨福合 , 邢秀梅 . 饲粮铜、锌含量及其互作效应对育成期水貂生长性能、营养物质表观消化率及铜、锌和氮代谢的影响[J]. 动物营养学报, 2015 , 27(8) : 2597 -2606 . DOI: 10.3969/j.issn.1006-267x.2015.08.034

Abstract

This experiment was conducted in a 3?3 factorial experiment based on a completely randomized design to evaluate the effects of dietary copper (Cu) and zinc (Zn) contents and their interaction on growth performance, nutrient apparent digestibility and Cu, Zn and nitrogen metabolism of growing mink (Mustela vison). One hundred and eight (60±3) days old male mink were randomly divided into 9 groups with 12 replicates each and 1 mink per replicate. The mink in those 9 groups were fed the basal diet (without Cu and Zn supplementations) supplemented with Cu from copper sulfate (CuSO4) and Zn from zinc sulfate (ZnSO4). The three Cu supplemental levels were 0, 15 and 30 mg/kg, respectively, while the three Zn supplemental levels were 0, 150 and 300 mg/kg, respectively. The pre-test period lasted for 7 days, and the trial period lasted for 60 days. The results showed as follows: the average daily feed intake (P=0.069) and average daily gain (ADG, P=0.058) had a influenced trend by dietary Cu content. Based on the ADG, the optimal copper and zinc contents estimated by Box-Behnken regression model were 51 and 117 mg/kg, respectively. In this case, the ADG obtained the highest value which was 14.10 g. 2) The ether extract (EE) apparent digestibility was significantly (P=0.019) and Cu apparent digestibility (P=0.001) were extremely significantly influenced by dietary Cu content, however, they were not significantly influenced by dietary Zn content (P>0.05). The interaction of Cu and Zn contents had no significant influence on EE apparent digestibility (P>0.05), but extremely significantly influenced Cu apparent digestibility (P=0.002). Cu intake, fecal and urinary Cu excretion and Cu retention were extremely significantly influenced by dietary Cu content (P=0.001). The interaction of Cu and Zn contents had a significant influence on Cu retention (P=0.019), and had an extremely significant influence on fecal Cu excretion (P=0.001). Zn intake, fecal and urinary Zn excretion and Zn retention were extremely significantly influenced by dietary Zn content (P=0.001). The interaction of Cu and Zn contents had no significant influence on Zn metabolism indices (P>0.05). The nitrogen metabolism indices were not significantly influenced by dietary Cu and Zn contents and their interaction (P>0.05). Comprehensive the results show that when the dietary Cu and Zn contents are 51 and 117 mg/kg,respectively, the growing mink has the highest ADG; when dietary Cu content is 39.83 mg/kg, growing mink has a higher EE apparent digestibility, which does not significantly influence Zn apparent digestibility and Zn metabolism; when Zn/Cu is more than 40, the Cu apparent digestibility and Cu retention are reduced.

Key words： copper; zinc; average daily gain; nutrient apparent digestibility; mink

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