林业科学2012，Vol.48Issue(4)：14-20,7.
林木竞争对臭冷杉生物量分配的影响
Effects of Tree Competition on the Biomass Partitioning of Abies nephrolepis
摘要
Abstract
Allometric equations for different biomass components were developed using stem diameters at different tree heights (DBH; crown base, Dc; 30 cm height, D30and tree base, DB ). The effects of tree competition on biomass partitioning was also analyzed. The results showed that DBH was a simple and reliable predictor for estimating above- and belowground biomass components. The allometric equations estimated with stem diameters at different tree heights all slightly overestimated biomeass components in the smaller stem diameter trees (diameter≤10 cm). The prediction errors increased with tree diameters. The ahoveground to belowground biomass ratio (T/R) did not correlate with tree age, individual plant biomass, mean annual growth rate of individual plant biomass and mean annual growth rate of tree height (P > 0. 05). With increasing competition intensity, the relative proportion of stem biomass decreased, whereas, that of canopy biomass (i.e., living branch and needle biomass) increased. The coarse root biomass maintained virtually constant proportion. As expected, the mean annual growth rate of DBH, mean annual growth rate of tree height and mean annual growth rate of individual plant biomass were negatively affected by competition intensity while T/R almost kept constant and was free of the intensity.关键词
生物量方程/T/R/生物量比例/林木竞争/臭冷杉Key words
biomass equation/ T/R/ biomass proportion/ tree competition/ Abies nephrolepis分类
农业科技引用本文复制引用
汪金松,范秀华,范娟,张春雨,夏富才..林木竞争对臭冷杉生物量分配的影响[J].林业科学,2012,48(4):14-20,7.基金项目
财政部林业公益性行业科研专项项目(200904022 （）
201004002) （）
国家“十一五”科技支撑项目(2006BAD03A0804) （2006BAD03A0804）
国家自然科学基金项目(30940012). （30940012）
