EFFECT OF DIETARY ENERGY, PROTEIN, AND LYSINE CONTENT ON PERFORMANCE AND YIELDS OF 2 STRAINS OF MALE BROILER CHICKS
EFFECT OF DIETARY ENERGY, PROTEIN, AND LYSINE CONTENT ON PERFORMANCE AND YIELDS OF 2 STRAINS OF MALE BROILER CHICKS
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DOI：
10.3382/ps.0710872
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发表时间：
1992-05-01
期刊：
影响因子：
4.4
通讯作者：
VEERKAMP, CH
中科院分区：
文献类型：
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作者：
HOLSHEIMER, JP;VEERKAMP, CH
在处理的析因安排中，给Arbor Acres和Ross雄性肉仔鸡四种含3，200 kcal ME/kg的日粮和四种含2，880 kcal ME/kg的日粮，每个能级两个CP能级（高能量饮食中分别为23.1和33.6%，低能量饮食中分别为21.0和29.7%）和每个能量水平每个CP水平两个赖氨酸水平（高能日粮中每CP水平1-20和1.36%;低能日粮中每CP水平1.08和1.22%）。试验期为8周龄。在6周龄和7周龄时，Arbor Acres雏鸡的增重显著高于Ross雏鸡（P <0.05），但在6周龄、7周龄和8周龄时，料重比也显著高于Ross雏鸡（P <0.05）。在6、7和8周龄时，高能日粮的增重和料重比显著优于低能日粮（P <0.05）。在赖氨酸含量相同的情况下，在6、7和8周龄时，正常蛋白质日粮的增重显著高于高蛋白质日粮（P <0.05）。在CP含量相同的情况下，高赖氨酸组的增重显著高于对照组（P < .05），罗斯雏鸡的产肉率和胸肉产量显著高于普通赖氨酸日粮（P < .05）（P < .001）与6、7、8周龄的Arbor Acres鸡相比，和剩余胴体率显著降低（P <0.05）。在三个屠宰日龄，两个品系的大腿、鸡腿、翅膀和脖子的产率没有差异。高能量、正常蛋白质和高赖氨酸日粮获得了显著较高（P <0.05）的烤后成品率。高赖氨酸日粮和正常蛋白日粮的胸肌产量显著高于高赖氨酸日粮（P <0.05）。低能量高蛋白日粮可获得较高的鸡腿产量（P <0.05）。低能量日粮和高CP日粮导致最低的皮肤和脂肪产量（P <0.05）。大多数产量值受年龄的影响。从6周龄增加到8周龄，烤好肉、胸肉、大腿、皮肤和脂肪以及剩余胴体的产量增加，但可食用器官、翅膀和颈部的产量下降（P <0.001）。
In a factorial arrangement of treatments Arbor Acres and Ross male broiler chicks were given four diets with 3,200 kcal ME/kg and four diets with 2,880 kcal ME/kg, two CP levels per energy level (23.1 and 33.6% in the high-energy diet and 21.0 and 29.7% in the low-energy diet) and two Lys levels per CP level per energy level (1-20 and 1.36% per CP level in the high-energy diets and 1.08 and 1.22% per CP level in the low-energy diets). The diets were given to 8 wk of age. Weight gain of Arbor Acres chicks was significantly higher (P < .05) than that of Ross chicks at 6 and 7 wk of age, but feed to gain ratios were also significantly higher (P < .05) at 6, 7, and 8 wk of age. Weight gain and feed to gain ratios were significantly better (P < .05) on the high-energy diets than on the low-energy diets at 6,7, and 8 wk of age. With equal Lys content, the normal-CP diets gave significantly higher gains (P < .05) than the high-CP diets at 6,7, and 8 wk of age. With equal CP content, the high-Lys diets gave significantly more gain (P < .05) than the normal-Lys diets at 6, 7, and 8 wk of age.Oven-ready and breast meat yields of Ross chicks were significantly higher (P < .001) compared with those of Arbor Acres chicks at 6, 7, and 8 wk of age and yields of edible organs, skin and fat, and remaining carcass were significantly lower (P < .05). Percentage yields of thighs, drumsticks, wings, and neck of both strains were not different at the three slaughtering ages. Significantly higher (P < .05) oven-ready yield was obtained with the high-energy, normal-CP, and high-Lys diets. Higher breast meat yield was obtained with the normal-CP and high-Lys diets (P < .05). Higher drumstick yield was obtained with the low-energy and high-CP diets (P < .05). The low-energy diets but also the high-CP diets resulted in the lowest skin and fat yield (P < .05). Most yield values were affected by age. By increasing age from 6 to 8 wk, yield of oven-ready, breast meat, thighs, skin and fat, and remaining carcass increased, but yield of edible organs, wings, and neck decreased (P < .001).