摘要
将定位试验地杉木人工林间伐后，对其生态系统不同层次养分积累动态特性进行了研究．结果表明：间伐后林木各器官营养元素含量发生了变化；乔木层由于生物量的减少，养分积累量也相应减少，而灌、草及死地被物层养分积累分别增加２７２．１％，３７．２％和１６０．０％；整个杉木人工林生态系统养分的积累无论是大量元素，还是微量元素均超过对照；林下植被和死地被物层在系统养分循环中具有重要作用．
The accumulation of nutrient elements in different strata of a thinned
Chinese fir plantation ecosystem are analyzed in this paper. The results show that element
contents in different organs of the thinned stand differ from those of the control stand. In the
arbor stratum, the accumulation of nutrient elements decreased because of the decrease of its
biomass, while that in the shrub, herb, and dead litter stratum increased by 272.10%,37.20%
and 160.00% respectivity . Both of macro and microelements accumulation in the thinned
Chinese fir plantation ecosystem are bigger than those in the control ecosystem. The
understory vegetation and dead litter play a great role in the nutrient cycling of the ecosystem.
出处
《中南林学院学报》
CSCD
1999年第2期15-19,共5页
Journal of Central South Forestry University
基金
林业部重点课题
关键词
杉木
人工林
生态系统
间伐
养分含量
养分积累
Chinese fir plantation, ecosystem, thinning, nutrient content, nutrient accumulation
