山药对肉仔鸡营养代谢及血液生理生化指标的影响研究

选用商品代艾维茵白羽肉鸡60只,随机分成5组,于28～35日龄用全收粪法进行消化代谢试验,并通过测定其血液生化指标,研究山药对肉仔鸡营养物质利用的影响.结果表明：代谢能以杆菌肽锌组最高,比对照组高8.69%,差异显著 （P〈0.05）,其次为2%添加组,比对照组提高7.23%,差异不显著（P〉0.05）.干物质代谢率2%添加组与对照组差异显著（P〈0.05）,其他各试验组与对照组相比差异均不显著（P〉0.05）.各山药处理组与杆菌肽锌组相比差异均不显著（P〉0.05）.粗蛋白和粗脂肪的代谢率各组间差异均不显著（P〉0. 05）.山药和抗生素的添加对血清总蛋白、白蛋白含量的影响并没达到显著性水平（P〉0.05）,但均有提高的趋势,其中以添加2%山药组最高.添加山药可降低血清中胆固醇和低密度脂蛋白的含量,升高高密度脂蛋白的含量.其中2%添加组低密度脂蛋白含量与杆菌肽锌处理组相比,显著低于杆菌肽锌组（P〈0.05）.2%山药添加组总胆固醇含量最低,高密度脂蛋白含量最高,与其他各处理组相比差异均不显著（P〉0.05）.

Effect of Supplemental Yam on Dietary Nutrient Metabolism and Blood Physiological-biochemical Parameters in Broilers

Sixty Arian broiler chicks were used to study the effect of Yam(Dioscorea spp) powder on dietary nutrient metabolism.The results showed that the metabolizable energy was the highest when Zn-B was added in the diet.Compared with that of the control group,both group Zn-B and group 2% Yam powder improved the metabolizable energy by 6.89% and 7.23%,respectively,while all the Yam groups had no significant differences(P>0.05).The digestibility of DM was significantly different compared with that of the control group(P<0.05);while that of the metabolizable energy,CP and EE were insignificantly different from control group(P>0.05),when group 2% was added in the diet.The lever of TP,ALB and HDL of the group 2% Yam were higher than that of the other groups,but no significant differences were observed(P>0.05).Compared with that of the Zn-B group,the group 2%Yam powder was lower than the lever of LDL significantly(P<0.05).