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KMID : 1025520030450040509
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Journal of Animal Science and Technology
2003 Volume.45 No. 4 p.509 ~ p.516
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Estimation of Growth Curve for Evaluation of Growth Characteristics for Hanwoo cows
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이창우/Lee, C. W.
최재관/전기준/나기준/이채영/양부근/김종복/Choi, J. G./Jeon, K. J./Na, K. J./Lee, C./Yang, B. K./Kim, J. B.
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Abstract
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Growth curves were estimated for 1083 female Korean cattle raised in Daekwanryeong branch, National Livestock Research Institute (NLRI). Comparisons were made among various growth curve models for goodness of fit for the growth of the cows. Estimated growth curve functions were W_(1)＝370.2e^(-2.208) for Gompertz model, W_(1)＝388.6(1－0.549e ^(0.00261t)^(3) for von Bertalanffy model, and W_(1)＝341.2(1＋5.652e^(0.00524t)^(-1) for Logistic model.
Ages at inflection estimated from Gompertz model, von Bertalanffy model and Logistic model were 242.2 days, 191.5 days, and 330.5 days respectively, body weight at inflection were 136㎏, 115㎏, and 170㎏, and daily gain at inflection were 0.445㎏, 0.451㎏, and 0.446㎏. The predicted weights by ages from Gompertz model, von Bertalanffy model, and Logistic model were consistently overestimated at birth weight and underestimated at 36 month weight. The von Bertalanffy model, which had a variable point of inflection fit the data best.
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KEYWORD
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