间伐后杉木人工林生态系统生物产量的动态变化

Biomass Dynamics of a Thinned Chinese Fir Plantation Ecosystem

对间伐后杉木人工林生态系统生物产量的动态变化的研究结果表明：间伐后生态系统生物量由对照的１８０．０５ｔ／ｈｍ２减少至１５６．５８ｔ／ｈｍ２，减少１３．０４％．系统生物量的减少主要是因为乔木层林木株数、生物量减少所致，乔木层生物量由对照的１７３．８７ｔ／ｈｍ２减少至１４２．７４ｔ／ｈｍ２，减少１７．９０％；但单株木的生物量增加了６４．０７％，尤以枝、叶和根增长迅速；林下植被生物量、死地被物生物量也大大超过对照林分，分别是对照的３．２５倍和１．

The biomass in a thinned Chinese fir plantation ecosystem has been compared with that in a controlled plantation ecosystem.The results show that the biomass of the thinned Chinese fir plantation ecosystem decreased by 13.04%,from 180.05 t/hm 2 to 156.58 t/hm 2,because the biomass of the arbor stratum decreased by 17.90%,from 173.87 t/hm 2 to 142.74 t/hm 2;but the biomass of a single tree increased by 64.07% and the branch,leaf and root grew more flourishing than those in the controlled plantation; also,the biomass of the understory and the biomass of the dead litter are respectively 3.25 and 1.93 times of those in the controlled plantation ecosystem.