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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 Internal Egg Characteristics of Phase One of Production 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 Internal Egg Characteristics of Phase One of Production in Arid Hot Climate

机译：干旱热气候下蛋型小鸡生长期日粮蛋白质和能量水平对生产蛋内蛋特性的影响

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A (3 x 3) factorial arrangement was used in a completely randomized design to study the effect of protein and energy levels during the growing period of pullet on subsequent egg production performance. Three levels of protein and three levels of energy during stages of pullet growth (starter 0 to 6 wk, grower 7 to 12 wk and developer 13 to 18 wk of age) and their effect on laying performance (22 to 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 (P2 and E2) and (P3 and E3). A total of 9 treatments in each phase of the growth period were employed (P1 = 18, P2 = 20 and P3 = 22% CP) and (E1 = 3000, E2 = 3100 and E3 = 3200 kcal of ME/kg of diet) starter, (P1 = 16%, P2 = 18% and P3 = 20% CP) and (E1 = 3000, E2 = 3100 and E3 = 3200 kcal of ME/kg of diet) grower and (P1 = 15%, P2 = 17% and P3 = 19% CP) and (E1 = 3050, E2 = 3150 and E3 = 3250 kcal of ME/kg of diet) developer. 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 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 to 36 week of age), 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 was not influenced by dietary protein levels fed to the birds during the growing period. Egg weight and egg mass were not affected by dietary energy levels fed to the birds during the growing period. Internal egg characteristics from 22 to 36 weeks of age were not affected by protein and energy levels during the growing period. The only exception was yolk weight, which was significantly (p < 0.05) higher for the birds fed the medium protein level (P2). Thus, feeding the higher protein levels (P2 and P3) had the highest egg mass. The best egg mass was recorded with P2E3 diet. There was an interaction effect (p < 0.05) between protein and energy for yolk weight and height and Haugh units.
机译：在完全随机的设计中使用了（3 x 3）析因排列，研究了在小鸡的生长期中蛋白质和能量水平对随后产蛋性能的影响。雏鸡生长阶段（起始0至6周，生长7至12周，发育13至18周）三个蛋白质水平和三个能量水平及其对产蛋性能的影响（22至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（P2和E2）以及（P3和E3）。在生长期的每个阶段总共采用9种疗法（P1 = 18，P2 = 20和P3 = 22％CP）和（E1 = 3000，E2 = 3100和E3 = 3200 kcal ME / kg饮食）初学者（P1 = 16％，P2 = 18％和P3 = 20％CP）和（E1 = 3000，E2 = 3100和E3 = 3200 kcal ME / kg日粮）种植者和（P1 = 15％，P2 = 17％和P3 = 19％CP）和（E1 = 3050，E2 = 3150和E3 = 3250 kcal ME /每公斤饮食）显影剂。每种处理重复三次，每次十只。在每个阶段，家禽组的阶乘安排处理均保持相同，但在19周龄之前，所有组均改为分层饮食，直至试验结束。评价了不同处理组的层性能。在产卵周期的第一阶段（22至36周龄）中，卵的质量受成长期饲喂禽类的蛋白质水平显着影响（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。在生长期，蛋重不受饲喂家禽饮食蛋白质水平的影响。蛋重和蛋重不受生长期饲喂家禽饮食能量水平的影响。在生长期间，22至36周龄的内部卵的特征不受蛋白质和能量水平的影响。唯一的例外是蛋黄重量，饲喂中等蛋白水平（P2）的家禽的蛋黄重量显着更高（p <0.05）。因此，饲喂较高蛋白水平（P2和P3）的鸡蛋质量最高。 P2E3饮食记录了最佳的鸡蛋质量。蛋黄重量，身高和Haugh单位之间，蛋白质和能量之间存在交互作用（p <0.05）。

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