以可消化氨基酸为基础配制日粮对蛋鸡粪便理化特性的影响

试验研究了以可消化赖氨酸(Lys)、蛋氨酸(Met)、苏氨酸(Thr)和色氨酸(Trp)为基础配制的5种日粮(玉米-豆粕型对照、玉米-豆粕型低蛋白、玉米-棉粕型、玉米-菜籽粕型和玉米-棉-菜粕型)对蛋鸡粪便理化特性的影响。结果表明:氨基酸平衡的低蛋白玉米-豆粕日粮与玉米-豆粕高蛋白日粮相比,显著降低鸡粪中水分、含氮量和挥发性盐基氮(P<0.05)。在等蛋白和等可消化氨基酸基础上,日粮蛋白质原料类型影响鸡粪理化性状。与豆粕日粮相比,菜籽粕日粮显著降低粪中含氮量(P<0.05),棉-菜籽粕日粮则提高粪中挥发性盐基氮含量(P<0.05),二者均提高粪中有机酸含量(P<0.05)。棉-菜籽粕日粮有降低粪中挥发酸含量的趋势,菜籽粕则有提高粪中挥发酸含量的趋势。

Effects of Well-balanced Diet of Digestible Amino Acids on Physical and Chemical Characteristics of Layer Feces

Five well-balanced diets of digestible amino acids,which include control diet(corn-soybean meal with high CP),low protein diet(corn-soybean with lower CP),corn-cottonseeds meal diet with high CP,corn-rapeseed meal diet with high CP and corn-rapeseed meal-cottonseed meal diet with high CP,were used to study the effects of diets on physical and chemical properties of layer feces.The results showed that compared with the control diet,moisture,contents of N and TVB-N in feces of layer fed low protein diet decreased significantly(P < 0.05).Significant differences were found among 4 diets with equal content of CP and amino acids.Compared with soybean meal diet,there were an evident decrease in the feces nitrogen of layer fed rapeseed meal diet(P < 0.05),and an obvious increase in the feces TVB-N of layer fed cottonseeds meal-rapeseeds meal diet(P < 0.05),both increased the content of organic acid in feces of layer significantly(P < 0.05).Cottonseed meal-rapeseeds meal diet tended to reduce total volatile acids in feces,while rapeseeds meal diet tended to increase it(P > 0.05).