PDF(Pubmed)
Abstract：
The present study was conducted 1) to investigate the effects of gender and temperature on growth performance in broiler chickens and 2) to establish body protein and fat deposition curves and amino acid patterns for broilers of both genders at different ambient temperatures. A total of 432 1-day-old (d) Arbor Acres chickens with a male/female ratio of 1:1 were randomly divided into the following 4 treatment groups: the male thermoneutral group, the female thermoneutral group, the male heat stress group, and the female heat stress group. The chickens in the thermoneutral groups were kept at a comfortable temperature from 1 to 42 d, while chickens in the heat stress groups were kept at a comfortable temperature from 1 to 28 d and at a high ambient temperature from d 29 to 42. The body composition retention data were obtained by comparative slaughter method, and the models were constructed by the Gompertz model. The results revealed significant variation in body protein content (BPC) and body fat deposition efficiency (BFE) between both genders and the 2 temperatures. Moreover, a noteworthy interaction between gender and temperature was observed in terms of the BPC and protein deposition efficiency (BPE). The following equations for body protein and body fat deposition in the thermoneutral groups were obtained: Body protein weight of male broilers: [Formula: see text] ; Body protein weight of female broilers: [Formula: see text] ; Body fat weight of male broilers: [Formula: see text] ; Body fat weight of female broilers: [Formula: see text] . Where t means age (d). The following equations for body protein and body fat deposition in the heat stress groups were obtained: Body protein weight of male broilers: [Formula: see text] ; Body protein weight of female broilers: [Formula: see text] ; Body fat weight of male broilers: [Formula: see text] ; Body fat weight of female broilers: [Formula: see text] . Where t means age (d). In addition, no significant difference in amino acid content was found between different genders and temperatures. The amino acid pattern could be divided into 2 stages: 0 to 14 d and 15 to 42 d. Our equations and patterns enable a deeper understanding of the nutritional requirements in broiler chickens under various temperature conditions. This enables researchers to develop more accurate feeding programs to fulfill the growth and health requirements of broiler chickens.
摘要：
本研究进行了1）研究性别和温度对肉鸡生长性能的影响；2）建立不同环境温度下两种性别肉鸡的体内蛋白质和脂肪沉积曲线以及氨基酸模式。将雄性/雌性比例为1:1的1日龄(d)ArborAcres鸡432只随机分为以下4个处理组:雄性热中性组,女性热中性组，男性热应激组，和女性热应激组。热中性组的鸡在舒适的温度下饲养1至42d，而热应激组的鸡在舒适的温度下保持1至28d，在高环境温度下保持29至42d。通过比较屠宰方法获得身体成分保留数据，模型由Gompertz模型构建。结果表明，两种性别和两种温度之间的体内蛋白质含量（BPC）和体内脂肪沉积效率（BFE）存在显着差异。此外，在BPC和蛋白质沉积效率（BPE）方面，观察到性别和温度之间的显着相互作用。获得了热中性组中的身体蛋白质和身体脂肪沉积的以下方程:雄性肉鸡的身体蛋白质重量:[配方:见文本];雌性肉鸡的身体蛋白质重量:[配方:见文本];雄性肉鸡的身体脂肪重量:[配方:见文本];雌性肉鸡的身体脂肪重量:[配方:见文本]。其中t表示年龄(d)。获得了热应激组中的身体蛋白质和身体脂肪沉积的以下方程:雄性肉鸡的身体蛋白质重量:[配方:见文本];雌性肉鸡的身体蛋白质重量:[配方:见文本];雄性肉鸡的身体脂肪重量:[配方:见文本];雌性肉鸡的身体脂肪重量:[配方:见文本]。其中t表示年龄(d)。此外,不同性别和温度之间氨基酸含量没有显着差异。氨基酸模式可分为2个阶段：0至14d和15至42d。我们的方程式和模式使人们能够更深入地了解各种温度条件下肉鸡的营养需求。这使研究人员能够开发更准确的喂养计划，以满足肉鸡的生长和健康要求。
