湖南省现有森林植被主要树种的碳含量

摘要

探讨了湖南省现有森林植被17种树种（杉木、马尾松、湿地松、柏木、乐昌含笑、红花木莲、樟树、桢楠、甜槠、青冈栎、木荷、杜英、山矾、枫香、拟赤杨、杨树、毛竹）各器官的碳含量及其各器官碳含量的算术平均值。结果表明：同一树种不同器官碳含量差异不显著，不同树种各器官碳含量由高至低的排序不完全一致，不同树种同一器官或同一树种不同器官碳含量算术平均值存在一定的差异；针叶树、常绿阔叶树、落叶阔叶树和毛竹各器官碳含量（g·g-1）的变化范围分别为0.491～0.566，0.421～0.549，0.449～0.550，0.470～0.496，各树种种内各器官碳含量算术平均值在0.486～0.551 g·g-1之间变化，柏木最高，毛竹最低；针叶树碳含量高于阔叶树、毛竹，各树种树干碳含量普遍较高于其它各器官，变化范围在0.493～0.556 g·g-1之间，地上部分碳含量普遍高于相应树种的地下部分；17种树种各器官碳含量的算术平均值为0.504 g·g-1。%Carbon concentrations of different organs and intra-species from 17 tree species (Cunninghamia lanceolata, Pinus massoniana,Pinus elliottii,Cupressus funebris,Michelia chapensis,Manglietia insigni,Cinnamomum camphora,Phoebe zhennan, Castanopsis eyre,Cyclobalanopsis glauca, Schima superba,Elaeocarpus decipiens,Symplocos caudate,Liquidambar formosana, Alniphyllum fortune,Populus, and Phyllostachys heterocycla) were studied in the existing forest vegetation in Hunan Province, China. The results show that there was no significant difference among carbon concentration of different organs from the same species, the sequences of carbon concentration in different organs for different species were not exactly the same, and there were obvious differences among mean arithmetical values of carbon concentrations of the same organ from different species or that of intra-species in different organs; Carbon concentrations of organs varied from 0.491 g ·g-1 to 0.566 g·g-1 for coniferous trees, from 0.421 g·g-1 to 0.549 g·g-1 for evergreen broad-leaved tree species, from 0.449 g·g-1 to 0.550 g·g-1 for deciduous broadleaf tree species and 0.470 g·g-1 to 0.496 g·g-1 forP. heterocycla, the arithmetic average carbon concentrations of organs from the same tree species varied from 0.486 g·g-1 to 0.551 g·g-1, of the 17 species,Cupressus funebrishad the highest carbon concentration, andEucalyptus globules had the lowest concentration, the carbon concentrations of coniferous trees were higher than those of broad-leaved tree species, that ofP. heterocyclawas the lowest; Carbon concentrations of trunks were generally higher than those of other organs, the average carbon content of trunk across 17 species varied from 0.493 to 0.556 g·g-1, carbon concentration of aboveground was higher than that of the subterranean from the corresponding species; The arithmetic average of carbon concentrations of organs from 17 tree species was 0.504g·g-1.