杉木人工林分蓄积和断面积生长率的预估模型

Prediction model of volume and basal area growth rate for \%Cunninghamia lanceolata \%plantations.

根据江西省杉木人工林的 16块密度试验复测样地数据 (株行距为 :2m× 3m ,2m× 1.5m ,2m× 1m ,1m× 1.5m ,1m× 1m) ,分别不同密度指标、不同年龄、不同预估间隔期和不同林分优势高 ,应用负指数模型对蓄积生长率和断面积生长率进行了模拟 ,模型的拟合效果良好 .给出的经验方程可用于森林经理调查中杉木人工林分蓄积数据的更新 ,并具有灵活、方便。

Based on 16 remeasured plots of \%Cunninghamia lanceolata\% plantations from Jiangxi Province for the planting spacing experiment (2?m×3?m, 2?m×1.5?m, 2?m×1?m, 1?m×1.5?m, 1?m×1?m)and different densities, age, prediction interval and dominant heights in the plantations, volume growth rate and basal area growth rate were fitted by using negative exponent model. The results show that the fitting precision is good. The empirical equation can be used in forest management inventory to update the volume of \%Cunninghamia lanceolata\% plantations, and it is of flexibility, conveniency and accuracy.