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首页> 外文期刊>Poultry Science >The effects of pullet body weight, dietary nonpyhtate phosphorus intake, and breeder feeding regimen on production performance, chick quality, and bone remodeling in broiler breeders.
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The effects of pullet body weight, dietary nonpyhtate phosphorus intake, and breeder feeding regimen on production performance, chick quality, and bone remodeling in broiler breeders.

机译：母鸡体重，饮食中非磷酸盐的磷摄入量和种鸡饲喂方案对肉鸡种鸡生产性能，雏鸡质量和骨骼重塑的影响。

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A 3x2x2 factorial experiment, consisting of 52 hens per treatment, was conducted to determine the effects of pullet BW, dietary nonphytate phosphorus (NPP), and feeding regimen on performance, progeny quality, and bone remodeling. Cobb 500 broiler breeder pullets were reared to 3 different growth curves: 20% under, Cobb standard, and 20% over. Body weights were recorded weekly and feed adjustments made accordingly. At 21 wk, 624 hens were fed one of 2 breeder diets differing only in the amount of dietary NPP: 0.15 or 0.40%. A normal feeding regimen was appropriate for the particular growth curve; an alternative regimen considered the 3 growth curves together as a flock. At 24, 26, and 29 wk, blood was collected from 5 hens per treatment every 4 h over a 24-h period. Plasma samples were analyzed for total alkaline phosphatase, tartrate-resistant acid phosphatase, parathyroid hormone-related peptide, Ca, and inorganic P. Eggs per hen housed were diminished in hens fed the low dietary NPP and by low pullet target weight. Hens fed low dietary NPP also had lower egg weights but better eggshell quality. Mortality was significantly higher in hens fed low dietary NPP. Breeder tibia relative strength and ash were also significantly lower in hens fed low dietary NPP, regardless of the quantitative amount. Progeny tibia ash was not affected by any treatment. Total alkaline phosphatase responded to pullet BW, however by wk 29, total alkaline phosphatase also became sensitive to dietary NPP. The NPP by pullet BW interaction for tartrate-resistant acid phosphatase levels became significant by 29 wk, and pullet BW was significant at wk 24. The NPP by pullet growth curve interaction was also critical for plasma inorganic P levels throughout the sampling period. In summary, both 0.15% dietary NPP and reared pullets 20% under standard BW negatively affect egg production but do not impair progeny productivity. Body composition appears to be a main contributor in bone remodeling mechanisms, especially during the transition into egg production.
机译：进行了一个3x2x2阶乘实验，每次处理由52只母鸡组成，以确定母猪体重，膳食非植酸磷（NPP）和喂养方式对性能，后代质量和骨骼重塑的影响。将Cobb 500肉鸡育种小鸡饲养到3种不同的生长曲线：Cobb标准下为20％，高出20％。每周记录体重，并据此进行饲料调整。在21周时，为624只母鸡饲喂2种种鸡日粮中的一种，只是日粮NPP的含量不同：0.15或0.40％。正常的喂养方式适合于特定的生长曲线。另一种方案认为这3条生长曲线共同构成了一群。在第24、26和29周的每24小时内，每4小时从每只处理的5只母鸡中收集血液。分析血浆样品中的总碱性磷酸酶，抗酒石酸酸性磷酸酶，甲状旁腺激素相关的肽，钙和无机磷。饲喂低日粮NPP且母鸡目标体重低的母鸡的鸡蛋减少。饲喂低日粮NPP的母鸡的蛋重也较低，但蛋壳质量更好。饲喂低饮食NPP的母鸡的死亡率显着更高。饲喂低日粮NPP的母鸡的胫骨相对强度和灰分也显着降低，无论其数量如何。后裔胫骨灰不受任何治疗的影响。总碱性磷酸酶对小鸡体重有反应，但是到29周，总碱性磷酸酶也对日粮的NPP敏感。在29 wk时，小鸡BW交互作用对耐酒石酸酸性磷酸酶的NPP显着升高，而24 wk时小鸡BW显着。在整个采样期间，小鸡生长曲线相互作用的NPP对血浆无机磷水平也至关重要。综上所述，标准体重下0.15％的日粮NPP和20％的饲养母鸡对产蛋率都有负面影响，但不会损害子代生产力。身体成分似乎是骨骼重塑机制的主要贡献者，尤其是在向卵子生产过渡期间。

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