高剂量铜在不同日粮营养条件下对肉鸭生长性能的影响

Effects of high copper in different dietary nutritional levels on the growth performance of meat ducks

试验用1000只樱桃谷肉鸭,随机分为4组。采用2×2因子设计,研究了日粮铜水平(10mg/kg和80mg/kg)在不同营养(2种营养水平)条件下对肉鸭生长性能的影响。饲养试验时间为35d。结果表明,在2种营养水平条件下高铜均未表现出促进生长的作用,并对生长具有抑制作用;在高营养水平、低铜水平条件下,肉鸭的生长性能极显著(P<0 01),高于高营养水平、高铜组及低营养水平组;在低营养水平、低铜组肉鸭的生长性能显著(P<0 05),高于低营养水平、高铜组和高营养水平、高铜组;低营养水平、高铜组和高营养水平、高铜组之间肉鸭的生长性能没有显著差异(P>0 05)。在高营养水平、低铜水平条件下肉鸭的增重/耗料(G/F)显著(P<0 05),高于高营养水平、高铜组及低营养水平组。各试验组之间死亡率没有显著差异(P>0 05)。

1000 1day old Cherry Valley meat ducks were used to study the effects of high copper in different dietary nutritional levels on the growth performance.2×2 factors experimental design (2 copper levels,10 and 80?mg/kg and 2 nutritional levels) was adopted to detect the effects of copper and nutritional levels on meat ducks.The feeding trial lasted 35 days.The results showed that high copper had not growthstimulant effects in 2 nutritional levels and had depressing effects on ducks growth.The high nutritional level and low copper group had very significantly higher average daily gain than high nutritional level and high copper group as well as the other 2 low nutritional groups (P<001).The low nutritional level and low copper group had significantly higher growth performance than 2 high copper groups (P<005).The 2 higher copper groups had no significant difference in growth performance index (P>005).The high nutritional level and low copper group had significantly higher gain/feed than high nutritional level and high copper as well as the other 2 low nutritional groups.The mortality rates among various groups were not different significantly(P>005).