A common allometric equation for root weight

异速生长关系是估算森林生物量的有力工具。然而，这些关系往往表现出森林类型和树种之间的分离。为了在野外建立它们，需要进行艰苦的工作，因此需要根据某些生物学规律建立通用方程，以便将它们应用于各种类型的林分。本研究以冷温带和暖温带森林的单株树重为基础，利用植物形态的管道模型和静态模型建立树木地上重和根重的异速生长关系。对地上权和根权的相对误差分别为13.84%和19.00%。这些相对误差小于用于估计的普通异速生长关系的相对误差。这些共同的方程将成为估算温带森林生物量的有力工具。

Allometric relationships are the powerful tool for estimating forest biomasses. However, these relationships often show the segregation among forest types and tree species. For establishing them in fields, laborious works are necessary, and so common equations based on some biological laws are awaited for applying them to various types of forest stands. In this study, the pipe model and static model of plant forms are used for establishing allometric relationships on the above-ground weight and root weight of trees, based on the individual tree weights of cool-temperate and warm-temperate forests. The relative errors of determined common equations were 13.84% and 19.00% respectively for above-ground and root weights. These relative errors were less than those of ordinary allometric relationships used for estimations. These common equations will become a powerful tool for estimating biomasses in temperate forests.