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首页> 外文期刊>International Journal of Poultry Sciences >The Effect of Dietary Protein and Energy Levels During the Growing Period of Egg-type Pullets on Early Egg Production and Egg Weight and Dimensions in Arid Hot Climate
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The Effect of Dietary Protein and Energy Levels During the Growing Period of Egg-type Pullets on Early Egg Production and Egg Weight and Dimensions in Arid Hot Climate

机译：干旱热气候条件下蛋型小鸡生长期日粮蛋白质和能量水平对早期产蛋量和蛋重和尺寸的影响

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A (3 x 3) factorial arrangement was used in a completely randomized design to study the effect of early nutrition of pullet on subsequent egg production and quality. Three levels of protein and three levels of energy during stages of pullet growth (starter 0-6 wk, grower 7-12 wk and developer 13-18 wk of age) and their effect on laying performance (22-36 wk of age) were evaluated. In all phases of growing period, control levels of protein (P1) and energy (E1) were set according to NRC (1994) and the other levels were higher, for protein in 2% steps (P2 and P3) and for energy by 100 kcal of ME/kg steps (E2 and E3). Each treatment was replicated three times with ten birds each. Treatments in the factorial arrangement were kept the same for bird groups in every phase but at 19 week of age all groups were shifted to the identical layer diet up to the end of the trial. The layer performance of the different treatment groups was evaluated. In phase one of egg production cycle (22-36 week of age), hen-day egg production was influenced (p < 0.01) by protein levels fed to the birds during the growing period. P2E3 diet had the best hen-day egg production. Egg mass was significantly (p < 0.01) affected by dietary protein levels fed to the birds during the growing period. The higher dietary protein levels (P2 and P3) fed to the birds during the growing period had higher egg mass than those fed the lowest protein level P1. Egg weight, egg length, egg width and feed consumption were not influenced by dietary protein levels fed to the birds during the growing period. Egg weight, mass, length, width and shape index and feed conversion were not affected by dietary energy levels fed to the birds during the growing period. Thus, feeding the higher protein levels (P2 and P3) had the highest hen-day egg production and egg mass. The best egg mass and egg production were recorded with P2E3 diet, so the feeding of the pullets with P2E3 diet during the growing period will give best hen-day egg production.
机译：在完全随机的设计中，使用了（3 x 3）因子分解法来研究母鸡早期营养对随后产蛋量和品质的影响。雏鸡生长阶段（起始年龄0-6周，生长者7-12周和发育13-13周）的蛋白质水平和能量水平分别为三个水平及其对产蛋性能的影响（22-36周龄）评估。在生育期的所有阶段，根据NRC（1994）设定蛋白质（P1）和能量（E1）的控制水平，其他水平较高，蛋白质以2％的步幅（P2和P3）以及能量增加100 ME / kg步的大卡（E2和E3）。每种处理重复三次，每次十只。在每个阶段，家禽组的因子分解处理方法均保持相同，但在19周龄之前，所有组均改用相同的分层饮食，直至试验结束。评价了不同处理组的层性能。在产蛋周期的第一阶段（22-36周龄）中，母鸡一天的产蛋量受成长期饲喂禽类的蛋白质水平的影响（p <0.01）。 P2E3饮食的母鸡产蛋量最好。在生长期中，饲喂家禽的饮食蛋白质水平显着影响了鸡蛋的质量（p <0.01）。在成长期中，饲喂家禽的日粮蛋白质水平较高（P2和P3）比饲喂最低蛋白质水平P1的鸡蛋更高。蛋的重量，蛋的长度，蛋的宽度和饲料的消耗量不受生长期间饲喂家禽饮食蛋白质水平的影响。蛋的重量，质量，长度，宽度和形状指数以及饲料转化率不受生长期间饲喂家禽饮食能量水平的影响。因此，饲喂较高蛋白水平（P2和P3）的母鸡产蛋量和蛋重最高。 P2E3饮食记录了最佳的鸡蛋质量和产蛋量，因此在生长期以P2E3饮食饲喂小母鸡将获得最佳的鸡蛋日产蛋量。

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