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采用非线性回归拟合方式对生长曲线进行logistic模型拟合,定量地模拟南京椴苗期生长规律。结果表明:logistic方程对南京椴1年生苗苗高和地径生长曲线的拟合相关性极显著,并采用数学模型来确定南京椴苗木生长的速生期,将生长期划分为4个时期,苗高的速生期在6月28日至8月23日,地径的速生期在7月21日至9月10日。最后还对苗期管理进行了探讨。
The logistic model was fitted to the growth curve by nonlinear regression fitting method to quantitatively simulate the growth of Nanjing linden seedlings. The results showed that the logistic equation was very significant for the fit of 1 year old seedling height and diameter growth curve of Nanjing Tilia and the mathematic model was used to determine the fast growing period of the growth of Nanjing Tilia seedlings. The growing period was divided into 4 periods High fast-growing period from June 28 to August 23, the fast-growing ground diameter in the July 21 to September 10. Finally, the seedling management was discussed.