海南省桉树、木麻黄、马占相思林分形高模型研建

Establishment of Stand Form-height Models for Eucalyptus,Casuarina equisetifolia and Acacia mangium in Hainan

为方便海南省森林资源规划设计调查工作中对桉树、木麻黄和马占相思林分蓄积量估测,通过设置临时样地和收集连清固定样地数据,分别对海南省桉树、木麻黄和马占相思建立了通用的林分形高模型,经模型检验分析后表明:所建林分形高模型预估精度高,达到98%以上;模型TRE指标接近于0,MSE指标也接近于0,不存在系统偏差;模型对于林分蓄积量的预估精度达到97%。模型研建方法可行,在实际森林资源调查中有推广使用的价值。

In this paper, we established stand form-height models for three tree species ： Eucalyptus, Casuari- na equisetifolia and Acacia mangium, using temporary plots and data of CFI. The testing results of these models showed that ： the prediction accuracies were significantly high, more than 98.% ; TRE indexes were close to 0 ; MSE indexeswere also close to 0 ; the prediction accuracies for volume estimation reached 97%. Therefore, the method of establishing these models was feasible and it will be valuable for the investigation of forest resources.