【摘要】 试验选用10周龄金定蛋鸭144只,研究在高温环境下(29~35℃)日粮中分别添加酵母硒(以硒量计)0(对照组)、0.15(处理Ⅰ组)、0.45(处理Ⅱ组)和0.75 mg/kg(处理Ⅲ组)对笼养育成蛋鸭(10~16周龄)生长性能和部分血液生化指标的影响。结果表明,与对照组相比,日粮中添加酵母硒能显著增加14~16周龄育成鸭的平均日采食量(P<0.05);处理Ⅰ组13~15周龄体重显著高于对照组(P<0.05),第16周龄体重显著高于其他3组(P<0.05),且与标准体重比较差异不显著(P>0.05),其他3组均极显著低于标准体重(P<0.01);4个组的料重比差异不显著(P>0.05),但以处理Ⅰ组的最低;处理Ⅰ组的谷草转氨酶(AST)活性显著低于处理Ⅱ组(P<0.05),3个处理组的乳酸脱氢酶(LDH)活性显著低于对照组(P<0.05),且处理Ⅰ组的乳酸脱氢酶活性又显著低于处理Ⅱ、Ⅲ组(P<0.05);处理Ⅰ、Ⅱ组血清总胆固醇(TCH)浓度显著高于处理Ⅲ组(P<0.05)。综合上述结果,高温环境下,在日粮中添加0.15mg/kg的硒(以酵母硒的形式)可明显改善笼养育成蛋鸭的生长性能,保护肝脏功能,提高育成鸭血清总胆固醇含量。更多还原

【Abstract】 The study was conducted to determine the effects of different levels of selenium yeast(SeY,added as selenium content)on growth performance and some biochemical indexes in Jinding laying ducks under high temperature(29-35 ℃).144 Jinding laying ducks of rearing period(10-16 weeks old)were divided into 4 groups,control group,experimental groupsⅠ,ⅡandⅢ,supplemented with 0,0.15,0.45 and 0.75 mg/kg Se,respectively.The results showed that compared with the control group,the addition of SeY to the diets could significantly increase the average daily feed intakes(ADFI)of ducks at 14-16 weeks old(P<0.05);The body weights of ducks in groupⅠ at 13-15 weeks old were significant higher than that in the control group(P<0.05),and the body weight at 16 weeks old was higher than the other three groups significantly(P<0.05),there was no significant difference between the body weight and standard body weight at 16 weeks old in groupⅠ(P>0.05),but the body weights of other three groups were extremely significantly lower than the standard weight(P<0.01);There was no significant difference among the four groups for feed to gain ratios(F/G),while the groupⅠ was the lowest;AST ac-tivities of groupⅠwere significantly lower than groupⅡ(P<0.05),LDH activities of groupsⅠ,ⅡandⅢ were lower than the control group significantly(P<0.05),and LDH activities of groupⅠwere lower than groupsⅡ andⅢsignificantly(P<0.05).TCH concentrations of groupsⅠandⅡ were higher than group Ⅲ significantly(P<0.05).It is concluded that the addition of 0.15 mg/kg of Se(added as SeY)could obviously improve the growth performance of the laying ducks in reared cages,protect the function of liver,promote the TCH concentrations of duck serum.更多还原