森林与环境学报2024，Vol.44Issue(4)：395-402,8.DOI:10.13324/j.cnki.jfcf.2024.04.007
6种阔叶树种幼苗生物量分配特征及模型构建
Biomass allocation and modelling of six broad-leaved tree species seedlings
摘要
Abstract
Two-year-old seedlings of six broad-leaved species,Phoebe bournei,Castanopsis fordil,Mytilaria laosensis,Quercus glauca,Quercus sessilifolia,and Schima superba,were obtained from the Baisha State-owned Forest Farm in Shanghang County,Fujian province,China. The biomass of the roots,stems,leaves,and whole plants of each species was determined by using the whole-plant harvesting method. The allocation characteristics of biomass and the isometric growth relationship between aboveground and underground biomass were compared. Regression estimation models for the biomass of each organ and the whole plant were established using regression analysis. The results showed that:(1) the whole seedling biomass of different tree species was significantly different,and the order was Q. glauca>M. laosensis>C. fordil>Q. sessilifolia>S. superba>P. bournei;(2) there were significant differences in the distribution of biomass among the organs of different tree species,with Q. glauca,M. laosensis,and P. bournei having the largest proportions of root biomass (39. 9％),stem biomass (45. 0％),and leaf biomass (49. 2％),respectively;(3) the ratio of belowground biomass to aboveground biomass of the seedlings of different tree species was less than 1,indicating that more seedling biomass was allocated to the stems and leaves. The aboveground and belowground biomass of the tree species followed an isotropic growth pattern,except in the case of S. superba;(4) the models for regression estimation of seedling biomass of different tree species were mostly power-function models,followed by cubic polynomial models. There were differences in the allocation of biomass among different organs in the seedlings. Additionally,an isometric growth pattern between the aboveground and belowground biomass in seedlings was revealed. The regression estimation model for seedling biomass of each tree species can be used to estimate seedling biomass under similar or identical site conditions.关键词
生物量模型/生物量分配/异速生长/根冠比/阔叶树幼苗Key words
biomass models/biomass allocation/allometric growth/root/shoot ratio/broad-leaved tree seedlings分类
农业科技引用本文复制引用
张非凡,李雪琴,武盼盼,钟全林,胡丹丹,程栋梁..6种阔叶树种幼苗生物量分配特征及模型构建[J].森林与环境学报,2024,44(4):395-402,8.基金项目
国家自然科学基金项目"木本植物叶功能性状的时空变异对叶经济谱关系格局的影响机制研究"(32071555) （32071555）
福建省科技厅公益类重点项目"亚热带森林木本植物不同冠层叶功能性状对其碳代谢-温度响应的调节"(2022R1002002). （2022R1002002）
