CAJ | 학술논문

本试验旨在研究饲粮铜水平对冬毛期银狐铜表观生物学利用率及组织器官铜沉积量的影响。选择50只120日龄、平均体重为（5134±540）g的健康雌性银狐，随机分成5组，每组设10个重复，每个重复1只银狐。各组分别饲喂在基础饲粮中添加6（Ⅰ组）、30（Ⅱ组）、60（Ⅲ组）、90（Ⅳ组）和150 mg/kg（Ⅴ组）柠檬酸铜的试验饲粮，基础饲粮中铜含量为4．92 mg/kg。预试期7 d，正试期51 d。结果表明：1）饲粮铜水平对平均日采食量、粪排出量和铜表观生物学利用率均无显著影响（P＞0．05），对铜摄入量和粪铜排出量有极显著影响（P＜0．01）。随着饲粮铜水平增加，铜摄入量和粪铜排出量极显著升高（ P＜0．01）。2）饲粮铜水平对毛铜、肝铜、肾铜和心铜沉积量均有极显著影响（ P＜0．01）。随着饲粮铜水平增加，毛铜沉积量呈升高趋势，Ⅴ组沉积量最高；各组间肝铜、肾铜和心铜沉积量未显现出规律性变化。3）饲粮铜水平对心脏重有显著影响（ P＜0．05），从Ⅱ组至Ⅴ组，心脏重呈降低趋势。饲粮铜水平对肝脏重、肾脏重和脾脏重无显著影响（ P＞0．05）。综合分析各项试验指标，得出银狐冬毛期基础饲粮中添加60 mg/kg柠檬酸铜（饲粮中铜含量约65 mg/kg）时，有利于银狐对铜的消化利用。
본시험지재연구사량동수평대동모기은호동표관생물학이용솔급조직기관동침적량적영향。선택50지120일령、평균체중위（5134±540）g적건강자성은호，수궤분성5조，매조설10개중복，매개중복1지은호。각조분별사위재기출사량중첨가6（Ⅰ조）、30（Ⅱ조）、60（Ⅲ조）、90（Ⅳ조）화150 mg/kg（Ⅴ조）저몽산동적시험사량，기출사량중동함량위4．92 mg/kg。예시기7 d，정시기51 d。결과표명：1）사량동수평대평균일채식량、분배출량화동표관생물학이용솔균무현저영향（P＞0．05），대동섭입량화분동배출량유겁현저영향（P＜0．01）。수착사량동수평증가，동섭입량화분동배출량겁현저승고（ P＜0．01）。2）사량동수평대모동、간동、신동화심동침적량균유겁현저영향（ P＜0．01）。수착사량동수평증가，모동침적량정승고추세，Ⅴ조침적량최고；각조간간동、신동화심동침적량미현현출규률성변화。3）사량동수평대심장중유현저영향（ P＜0．05），종Ⅱ조지Ⅴ조，심장중정강저추세。사량동수평대간장중、신장중화비장중무현저영향（ P＞0．05）。종합분석각항시험지표，득출은호동모기기출사량중첨가60 mg/kg저몽산동（사량중동함량약65 mg/kg）시，유리우은호대동적소화이용。
This experment was conducted to study the effects of dietary copper level on copper apparent biolog-ical utilization and copper deposition in tissue and organ of silver foxes during the winter hair period. Fifty 120-day-old female silver foxes with an average body weight of ( 5 134 ± 540 ) g were selected and randomly as-signed into 5 groups with 10 replicates in each group and 1 silver fox in each replicate. Foxes in the 6 groups were fed the basal diets supplemented 6 ( group Ⅰ) , 30 ( group Ⅱ) , 60 ( group Ⅲ) , 90 ( group Ⅳ) and 150 mg/kg ( groupⅤ) citric acid copper, respectively. The copper content in basal diet was 4.92 mg/kg. The pre-trial period lasted for 7 days and the trial period lasted for 51 days. The results showed as follows:1) diet-ary copper level did not significantly affect average daily feed intake, fecal output and copper apparent biologi-cal utilization ( P>0.05) , but significantly affected the copper intake and fecal copper output ( P<0.01) . The copper intake and fecal copper output were significantly increased with dietary copper level increasing ( P<0.01) . 2) Dietary copper level significantly affected the copper deposition in hair, liver, kidney and heart ( P<0.01) . The hair copper deposition were increased with dietary copper level increasing, and that of group Ⅴwas the highest. There was no regular change on copper deposition in liver, kidney and heart. 3) Dietary cop-per level significantly affected the heart weight ( P<0.05) , from groupⅡto groupⅤ, heart weight had a de-clined trend. Dietary copper level did not significantly affect liver weight, kidney weight and spleen weight ( P>0.05) . It is concluded that adding 60 mg/kg citric acid copper ( actual dietary copper content appropriately 65 mg/kg) in the basal diet is beneficial for digestion and utilization of copper of silver foxesx during the win-ter hair period.