火力楠人工林森林生物量和林分碳储量研究

Forest Biomass and Stand Carbon Storage of Michelia macclurei Plantations

火力楠是原生于我国南部、生长迅速、用途广泛的优良乔木树种。试验以生长10年的火力楠人工林为材料采集乔木各器官及乔灌草凋各层样本,采用相对生长法以胸径为变量与树木各器官结合,建立标准木主干、枝条、叶和根四种器官生物量的异速生长模型,通过换算干重比的方法估算生物量并加以比较;乘以对应的含碳系数换算成碳储量,再加和估算林分总碳储量。火力楠人工林乔木层生物量为21.60 t·hm^(-2);总森林生物量为25.96 t·hm^(-2);林分总碳储量为12.60 t·hm^(-2)。试验地火力楠人工林的郁闭度较大,林下植被较少,乔木层碳储量占比很高,反映出火力楠是较好的碳汇树种。

Michelia macclurei is an excellent tree species growing rapidly and is widely used in the southern region of our country.In this experiment,samples of tree organs and tree,shrub,grass and litter were collected from a 10-year plantation.The allometric growth model of trunk,branch,leaf and root of standard wood was established by using relative growth method with DBH as variables in combination with various tree organs.The biomass was estimated and compared by conversion of dry weight ratio.Carbon storage was obtained by multiplying the dry matter with the corresponding carbon content coefficient.and the estimate of the total carbon storage of the stand was calculated.The biomass of the tree layer in the plantation was 21.60 t·hm^(-2).The total forest biomass was 25.96 t·hm^(-2).The total carbon storage of the stand was 12.60t·hm^(-2).The canopy density,understory vegetation and carbon storage ratio of the tree layer were relatively high,indicating that the tree was a better carbon sink species.