【摘要】 试验选用10周龄金定鸭母鸭180只,研究在高温环境下(29~35℃)日粮中分别添加0(对照组)、300(处理Ⅰ组)、500(处理Ⅱ组)、900(处理Ⅲ组)、1500 mg/kg(处理Ⅳ组)维生素C(VC)对笼养育成蛋鸭(10~16周龄)生长性能和生化指标的影响。结果表明:处理Ⅱ组12~14周龄和16周龄的采食量均明显高于其他组(P<0.05),试验期间只均采食量比对照组高12.40%。处理Ⅱ组12~13周龄和16周龄体重均明显高于其他组(P<0.05),试验期间只均增重比对照组高78.33%。总蛋白、白蛋白、球蛋白及乳酸脱氢酶活性在各组之间差异不显著(P>0.05),处理Ⅰ和Ⅱ组的谷丙转氨酶活性和谷草转氨酶活性分别比对照组显著降低32.09%、33.23%和34.90%、34.65%(P<0.05),处理Ⅱ组的脾脏指数显著高于其他组(P<0.05),且处理Ⅱ组的卵巢重量指数、输卵管重量指数和输卵管长度指数分别比对照组高1251.09%、214.31%、58.91%(P<0.01),也明显高于处理Ⅰ和处理Ⅳ组(P<0.01)。结果提示,日粮中添加500 mg/kg的维生素C可明显改善笼养育成蛋鸭的生长性能,保护肝脏功能,促进免疫器官和生殖器官的生长发育。更多还原

【Abstract】 The study was conducted to determine the effects of added different vitamin C(VC) levels including 0(control group),300(groupⅠ),500(group Ⅱ),900(group Ⅲ),1500 mg/kg(groupⅣ) respectively to the diet on growth performance and biochemical indexes of laying ducks.A total of 180 Jinding laying ducks of rearing period(10 ~ 16 weeks old) in cages on high temperature environment(29 ~ 35 ℃) were selected.The results showed that the feed intakes at week 12 ~ 14 and 16 of group Ⅱwere higher than other groups(P < 0.05),the average feed intake in the whole experiment period was 12.40% higher than control group.The body weight at week 12 ~ 13 and 16 of group Ⅱwere higher than other groups(P < 0.05),the average weight gain in the whole experiment period was 78.33% higher than control group.There were no significant differences among the five groups about total protein(TP),albumin(ALB),globulin(GLB) concentrations and lactic dehydrogenase(LDH) activity(P > 0.05);the glutamic pyruvic transaminase(GPT) and glutamic oxalacetic transaminase(GOT) activities of group Ⅰ and group Ⅱ were 32.09%,33.23% and34.90%,34.65% lower than control group(P < 0.05); the spleen indexes of group Ⅱwere significantly higher than other groups(P < 0.05);the ovary weight index,oviduct weight index and oviduct length index of group Ⅱ were 1251.09%,214.31%,58.91% higher than control group(P < 0.01),and higher than groupⅠand group Ⅳ(P < 0.01).It was concluded that the addition of 500 mg/kg of VC could obviously improve the growth performance of the laying ducks in reared cages,protect the function of liver,promote the growth and development of immune organs and reproductive organs.更多还原