Meyer G B, Props C F, Leighton A T, Van Krey H P, Potter L M
Poult Sci. 1980 Feb;59(2):352-7. doi: 10.3382/ps.0590352.
Large White female turkeys of a commercial variety were used to determine the effects of low dietary protein during the pre-breeder period (12 to 32 weeks of age) on subsequent reproductive performance. Diets containing 10, 12, 14, and 17% protein were fed from 12 weeks or 20 weeks to 32 weeks of age. At 32 weeks of age, all females were fed a 17% protein breeder diet. Reproductive performance was measured for a 24-week production period. Pre-breeder feed consumption and body weight gain from 12 to 32 weeks of age increased with increased dietary protein until diets contained 14% protein. Similar results were obtained when females were fed varying protein levels from 20 to 32 weeks of age. Egg production also showed an increase with increased pre-breeder dietary protein level until diets contained 14% protein. Ten fewer eggs per hen were obtained from females previously fed the 10% protein diet than those fed the 14% (20 to 32 weeks) and 17% protein diets. Pre-breeder dietary protein level did not affect age at sexual maturity, egg weight, specific gravity or shell thickness of eggs, mortality or growth, and feed consumption of progeny. Based upon the results of this study, female breeder turkeys require at least 14% protein to 20 weeks of age and 14% from 20 to 32 weeks of age for optimum egg production.
使用商业品种的大型白色雌性火鸡来确定繁殖前期（12至32周龄）低蛋白日粮对后续繁殖性能的影响。从12周龄或20周龄至32周龄饲喂蛋白质含量分别为10%、12%、14%和17%的日粮。在32周龄时，所有雌性火鸡均饲喂17%蛋白质的繁殖期日粮。在24周的产蛋期内测定繁殖性能。繁殖前期（12至32周龄）的采食量和体重增加量随着日粮蛋白质含量的增加而增加，直至日粮蛋白质含量达到14%。当雌性火鸡在20至32周龄饲喂不同蛋白质水平日粮时，也得到了类似的结果。产蛋量也随着繁殖前期日粮蛋白质水平的增加而增加，直至日粮蛋白质含量达到14%。之前饲喂10%蛋白质日粮的母鸡比饲喂14%（20至32周）和17%蛋白质日粮的母鸡每只少产10枚蛋。繁殖前期日粮蛋白质水平不影响性成熟日龄、蛋重、蛋的比重或蛋壳厚度、死亡率或生长以及后代的采食量。基于本研究结果，雌性种用火鸡在20周龄前需要至少14%的蛋白质，在20至32周龄需要14%的蛋白质以实现最佳产蛋量。
