一个无全局参数的单木胸径生长模型的应用与实例分析

Application and Analysis of A Non-parametric Growth Model of Diameter at Breast Height for Single Tress

提出了一个无参数的胸径生长模型。该模型可直接应用于任何具有2次胸径观测值的林分,与林分表法的应用条件基本一致。对140株火炬松人工林15年逐年观测数据的验证表明,预测效果虽略逊于有参数的Schnute模型和Korf模型,但与林分表法相比,预测精度大幅提高。建议替代林分表法用于未建立生长模型林分的胸径预测。

A non-parametric growth model was proposed for diameter at breast height（DBH）.As the stand table projection method,the model could be applied directly to any stand,given that two previous DBH observations are available.Based upon 15 annual DBH repeated measurements of 140 Loblolly pine trees,it was shown that the model significantly improved diameter predictions in comparison with the stand table projection method,despite the fact that it was slightly worse than Schnute model and parametric Korf mdoel.It is suggested that the model be applied to stands for which no growth models are built.