Beef Cattle Research Station, Pasuruan, East Java, 67184, Indonesia.
Faculty of Animal Science, IPB University, Bogor, 16680, Indonesia.
Trop Anim Health Prod. 2022 Aug 9;54(5):252. doi: 10.1007/s11250-022-03254-z.
Growth curves are important for understanding the growth phase and specific characteristics of farm animals. This study evaluated growth curve models to predict the age at puberty and growth rate of Ongole Grade cattle. The study used the weights of cattle from birth to 5 years old in 2011 to 2019 obtained from the Beef Cattle Research Station. The data were analyzed using four non-linear growth curve models: Brody, von Bertalanffy, logistic, and Gompertz. The coefficients of determination (R) of the growth equation for the respective models were in the high range. The lowest Akaike's information criterion (AIC) value for males and females was obtained by the Brody and logistic models, respectively. Males with the von Bertalanffy, logistic, and Gompertz models had an estimated age and body weight at puberty of 12.56 months and 198.93 kg, 21.46 months and 298.43 kg, and 15.71 months and 235.49 kg, respectively, while females had an estimated age and body weight of 11.79 months and 166.44 kg, 13.94 months and 164.08 kg, and 11.76 months and 169.57 kg, respectively. The Brody function best fit the growth rate and exhibited the smallest mean deviation.
生长曲线对于了解家畜的生长阶段和特定特征非常重要。本研究评估了生长曲线模型，以预测翁格尔品种牛的初情期年龄和生长速度。该研究使用了 2011 年至 2019 年期间从 Beef Cattle Research Station 获得的牛从出生到 5 岁的体重数据。使用 Brody、von Bertalanffy、logistic 和 Gompertz 四种非线性生长曲线模型对数据进行了分析。各模型生长方程的决定系数（R）处于较高范围。Brody 和 logistic 模型分别为雄性和雌性获得了最低的 Akaike 信息准则（AIC）值。具有 von Bertalanffy、logistic 和 Gompertz 模型的雄性初情期的估计年龄和体重分别为 12.56 个月和 198.93 公斤、21.46 个月和 298.43 公斤以及 15.71 个月和 235.49 公斤，而雌性的估计年龄和体重分别为 11.79 个月和 166.44 公斤、13.94 个月和 164.08 公斤以及 11.76 个月和 169.57 公斤。Brody 函数最适合生长速度，表现出最小的平均偏差。
