Dietary digestible lysine requirements of male and female broilers from forty-nine to sixty-three days of age
Dietary digestible lysine requirements of male and female broilers from forty-nine to sixty-three days of age
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DOI：
10.3382/ps.2007-00529
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发表时间：
2008-07-01
期刊：
影响因子：
4.4
通讯作者：
Schilling, M. W.
中科院分区：
文献类型：
--
作者：
Dozier, W. A., III;Corzo, A.;Schilling, M. W.
本试验研究了49 ~ 63日龄肉仔鸡公、母鸡可消化赖氨酸（dig）的需要量。配制了由玉米、豆粕和玉米蛋白粉组成的剂量反应饲料，使其具有足够的消化氨基酸浓度（赖氨酸除外）。将L-赖氨酸盐酸盐添加到剂量反应饲料中，以制备7种实验饲料。试验日粮消化赖氨酸的浓度范围为0.50 ~ 1.04%，以0.09%为增量。测量的变量包括标准化的日粮赖氨酸消化率，饲料摄入量，消化赖氨酸摄入量，BW增益，饲料转化率，死亡率，腹脂重量和百分比，胴体重量和产量，和总胸肉重量和产量。试验1用去盲肠公鸡测定了剂量-反应日粮中赖氨酸含量为0.51%。试验2中，在95%的反应基础上，公肉鸡对日增重、料肉比、胸肉重和胸肉产量的赖氨酸需要量分别为0.86%、0.88%、0.90%和0.90%。从49日龄到63日龄，雄性肉鸡的生长和产肉率测量优化约3.0 g的消化赖氨酸摄入量。试验3中，母肉仔鸡对赖氨酸的需要量分别为0.79%和0.83%。可消化赖氨酸的摄入量优化生长性能所需的是2.8克/鸟在49至63日龄。这些结果表明，对于生长性能和胸肉产量，雄性肉仔鸡消化赖氨酸的需要量分别为日粮的0.87%和0.90%。相反，仅根据生长性能，雌性的饲料赖氨酸需求量为0.81%。
Experiments were conducted to evaluate digestible (dig) Lys requirements of male and female broiler chickens from 49 to 63 d of age. A dose-response diet consisting of corn, soybean meal, and corn gluten meal was formulated to be adequate in dig amino acid concentrations with the exception of Lys. L-Lysine.HCl was added to the dose-response diet to create 7 experimental diets. Concentrations of dig Lys of experimental diets ranged from 0.50 to 1.04% in increments of 0.09%. Variables measured consisted of standardized dietary Lys digestibility, feed intake, dig Lys intake, BW gain, feed conversion, mortality, abdominal fat weight and percentage, carcass weight and yield, and total breast meat weight and yield. In experiment 1, dig Lys of the dose-response diet was determined as 0.51% with cecectomized roosters. In experiment 2, dig Lys requirements of male broilers for BW gain, feed conversion, breast meat weight, and breast meat yield were 0.86, 0.88, 0.90, and 0.90%, respectively, based on 95% of the responses. From 49 to 63 d of age, male broilers optimized growth and meat yield measurements with approximately 3.0 g of dig Lys intake. In experiment 3, dig Lys requirements of female broilers were estimated as 0.79 and 0.83%, respectively, for BW gain and feed conversion. Digestible Lys intake necessary to optimize growth performance was 2.8 g/bird during 49 to 63 d of age. These results indicate that dig Lys requirements for male broilers were 0.87 and 0.90% of the diet, respectively, for growth performance and breast meat yield. Conversely, the dig dietary Lys requirement for females was 0.81% based only on growth performance.