树木木质部含碳率变化规律研究进展

Research Progresses in Variation Patterns of Wood Carbon Fraction

树木木质部含碳率是指树木木质部生物量中碳质量所占的比例,是森林碳储量科学评估的重要组成部分。近年来,越来越多的研究已不断量化树木木质部含碳率在森林生物群落、分类群(针叶材与阔叶材)、树种、器官、组织类型乃至生长轮水平的差异,但在全球范围内广泛采用的木质部含碳率简化值(50%)可能使森林碳储量的准确评估产生一定程度的偏差。文中综述树木木质部含碳率变化规律的主要研究进展,展望木质部含碳率在测量评估体系、多尺度研究以及数据库构建方面的发展方向,以期实现树木木质部含碳率在森林碳储量评估中更科学、更具时空与分类学特征的应用。

Wood carbon fraction(CF),representing the proportion of carbon in wood biomass,is critical for accurately quantifying forest carbon stocks.Recent studies have quantified wood CF variations across different biomes,taxonomic groups(conifers vs.broadleaves),species,organs,tissue types,and even within individual growth rings.The prevailing use of a generalized CF value(50%)may lead to potential biases in calculating forest carbon storage.This paper reviews major advancements in the study of wood CF variability and discusses the developments in assessment methods,multi-scale research,and database construction for wood CF,aiming to enhance the scientific application of wood CF in forest carbon stock assessments of spatial,temporal,and taxonomic characteristics.