江淮水牛生长发育规律研究

Growth and Development Pattern of Jianghuai Buffalo

中文关键词: 江淮水牛  体尺性状  生长规律  生长模型

英文关键词: Jianghuai buffalo, body measurements traits, growth and development pattern, growth model

中文摘要:

      [目的]研究分析江淮水牛体重与体尺的关系，探明江淮水牛的生长发育规律。[方法]分别测定初生、6月龄、12月龄、24月龄、36月龄和48月龄共146头水牛的体重体尺性状，利用Duncan’s多重比较法，检验各阶段水牛体重和体尺性状的差异显著性。利用Biraviate相关法检验其之间相关性。选用Gompertz、Logistic和Von Bertalanffy三种非线性模型拟合江淮水牛母牛体重的累积生长过程。[结果]表明36月龄之前，江淮水牛的体重呈快速增长阶段。江淮水牛体重与坐骨端宽无显著相关性（P＞0.05），与体高等4项指标之间存在着极显著的相关性（P＜0.01），以胸围的相关度最为显著，三种模型都能很好的拟合江淮水牛母牛的生长曲线，且拟合度（R2）均大于0.980。 [结论]江淮水牛母牛的Bertalanffy非线性模型拟合度（R2）最高，但综合拐点体重和拐点月龄来考虑，Logistic模型更符合，其方程为Y=524.984/(1+6.616e-0.130t),由此得出江淮水牛母牛拐点重量262.492kg，拐点月龄14.534月龄。

英文摘要:

      [Objective] The aim of this study was to study the relationship between body weight and body measurements traits as well as explore the growth and development pattern in Jianghuai buffalo. [Method] A total of 146 Jianghuai buffalo were selected, including birth, 6-month, 12-month, 24-month, 36-month and 48-month, respectively. Body weight and body size traits of selected buffalo were measured. Duncan’s method was used to compare the body weight and body size traits of buffalo at various stages, as well as to test the significant differences of stage. Moreover, Biraviate correlation was used to analyze the correlation between body size and body weight. The nonlinear Gompertz, Logistic and Von Bertalanffy models were used to fit the cumulative growth process of body weight. [Results] The results showed that the body weight of Jianghuai buffalo was increasing rapidly before 36-month. Importantly, the body weight was not significantly correlated with hucklebone width (P＞0.05) , but there was a significant correlation with the body high and other traits (P＜0.01), especially in the chest circumference. The three models could well fit the growth curve of Jianghuai buffalo, and R2 was above 0.980 in Logistic model. [Conclusion] The nonlinear Bertalanffy model of Jianghuai buffalo had the highest fit. But considering the growth and month inflection point, the Logistic model was more consistent and Y=524.984/(1+6.616e-0.130t), and the inflexion of body weight was 262.492Kg as well as the age was 14.534 months.