基于Logistic模型的槟榔果实生长发育研究

Analysis of Growth and Development of Arecanut Fruit Based on Logistic Model

以‘热研1号’槟榔为试验材料,通过测定果实生长时期纵径、横径、鲜重、干重的变化,结合Logistic模型分析,研究槟榔果实生长发育规律。研究结果表明:槟榔果实的生长发育呈单"S"形曲线,槟榔果实纵径、横径、鲜重和干重的生长终极值与实测值之间相关性达极显著水平(p敿0.001),Logistic拟合系数均超过0.97。因此,Logistic模型可准确地预测槟榔果实的生长发育。另外,通过拟合方程还可确定槟榔果实的发育时间节点,整个过程可分为3个时期:(1)生长初期,即自授粉受精后的第1个月;(2)快速生长期,第2~4个月,果实纵横径和体积显著增加;(3)生长后期,约7~8个月,干物质积累的重要时期。

The change of vertical diameter, horizontal diameter, fresh weight and dry weight of the fruit of Arecanut variety Reyuan 1 were measured to analyze the growth and development of the fruit based on logistic model. The results showed that the growth of the Arecanut fruit showed a S curve. The correlation between the ultimate growth value and the actual growth value of vertical diameter, horizontal diameter, fresh weight and dry weight of the fruit was highly significant at p〈0.001. The fitting coefficient of the Logistic model was higher than 0.97. The Logistic model could accurately forecast the growth and development of the Arecanut fruit. The fruit development stages could be determined by using the fitting equation and divided into three stages： （1） The initial stage, the first month after pollination and fertilization; （2） The rapid growth stage, 2nd - 4th months, when vertical diameter, horizontal diameter and volume of the Arecanut fruit increased significantly, and; （3） The late stage, 7th - 8th months, an important period for dry matter accumulation.