4至7周龄期间雄性和雌性肉鸡对色氨酸的需求量。

The tryptophan requirement of male and female broilers during the 4-7 week period.

作者信息

Hunchar J G, Thomas O P

出版信息

Poult Sci. 1976 Jan;55(1):379-83. doi: 10.3382/ps.0550379.

Abstract

Studies with broiler type chickens were conducted to determine the minimum tryptophan requirement for maximum growth, optimum feed efficiency and molted body feather count for the 4-7 week period of growth for both male and females. Basal diets analyzed to contain 0.158, 0.157, and 0.147% tryptophan using analyzed tryptophan values of 0.09, 0.01, 0.31, 0.70, 0.40, and 0.46% for corn, gelatin, corn gluten meal, soybean meal, peanut meal-45, and peanut meal-50, respectively. Based on the regression equations for males, the calculated tryptophan requirement for maximum growth, optimum feed efficiency, and molted body feather count for the 4-7 week period is 0.179, 0.170, and 0.172%, respectively for 3300 Kcal. of M.E. per kg. of diet. When expressed as a function of energy, these requirements would be 0.054, 0.052, and 0.052% tryptophan per megacalorie of M.E. per kg. of diet, respectively. Based on the equations for females, the calculated tryptophan requirement for maximum growth, optimum feed efficiency, and molted body feather count is 0.173, 0.163, and 0.172%, respectively for 3300 Kcal. of M.E. per kg. of diet, respectively.

摘要

针对肉仔鸡类型的鸡进行了研究，以确定在4至7周龄生长期间，雄性和雌性鸡达到最大生长、最佳饲料效率和换羽后体羽数量所需的色氨酸最低需求量。基础日粮经分析含有0.158%、0.157%和0.147%的色氨酸，分别采用玉米、明胶、玉米蛋白粉、豆粕、45%花生粕和50%花生粕的色氨酸分析值0.09%、0.01%、0.31%、0.70%、0.40%和0.46%。根据雄性鸡的回归方程，对于每千克日粮含3300千卡代谢能，在4至7周龄期间，达到最大生长、最佳饲料效率和换羽后体羽数量所需的色氨酸计算值分别为0.179%、0.170%和0.172%。当以色氨酸需求量与能量的函数关系表示时，这些需求量分别为每千克日粮每兆千卡代谢能0.054%、0.052%和0.052%的色氨酸。根据雌性鸡的方程，对于每千克日粮含3300千卡代谢能，达到最大生长、最佳饲料效率和换羽后体羽数量所需的色氨酸计算值分别为0.173%、0.163%和0.172%。