雷州黑鸭生长规律及其生长曲线模型拟合分析

为了研究雷州黑鸭的早期生长发育规律,运用Logistic、Gompertz和Von Bertalanffy等3种生长曲线模型对雷州黑鸭公母鸭0～16周龄体重进行拟合分析.结果表明,3种生长模型都能很好地拟合雷州黑鸭生长曲线,公母鸭的最佳拟合模型都是Von Bertalanffy,分析得到公鸭曲线的拟合度为0.995,母鸭的拟合度为0.998;公鸭的拐点周龄和拐点体重分别是5.17周、506.76 g,母鸭的拐点周龄和拐点体重分别是4.66周、458.01 g,最佳上市日龄可在10周龄左右.在实际生产中,应尽量满足雷州黑鸭前10周的营养供给,最大限度地提高雷州黑鸭的体重,以获得最大的经济效益.

Study on growth rule and growth curve model fit to Leizhou black ducks

In order to study the early growth rules of Leizhou black ducks, three growth curve models (Logistic, Gompertz and Von Bertalanffy) were used to fit and analyze Leizhou black ducks from 0 to 16-week-old weight. The results showed that the growth curves were appropriately fitted with all three models and the best one was Von Bertalanffy model for both male and female ducks. Analyzed from the Von Bertalanffy model, the goodness-of-fit of male duck growth curve was 0.995 and that of female duck was 0.998. In addition, the weeks and weights of inflection piont of male duck were respectively 5.17 weeks and 506.76 g, which were higher than those of female duck (4.66 weeks and 458.01 g). Moreover, the best market age of Leizhou black duck was 10-week old. As a result, it was necessary to meet nutrition supply as far as possible in the first 10 weeks during growth and development in actual production to achieve the goal of furthest increase of body weight and gain the greatest economic benefits.