摘要
在测定天然更新檫木林的檫木〔Sassafrastsumu(Hemsl.)Hemsl.〕各器官热值的基础上,建立檫木能量回归模型,进而计算了群落能量现存量。结果表明:檫木各器官热值具有一定差异,其中叶的热值最大,树干的热值最小;檫木树干、枝、根及全树的能量与D和D2H(D为胸径,H为株高)回归关系达到极显著水平,而叶的能量与D和D2H回归关系不明显;各径级檫木树干能量的70%以上聚集在树干下部;不同径级檫木枝的能量分布不同,大径级主要集中在枝的中上部,中小径级主要集中在枝的下部;天然更新檫木林檫木的能量现存量为1.23×106kJ·hm-2,从大至小排序依次为树干(72.58%)、根(20.15%)、枝(7.08%)、叶(0.19%)。
The caloric value of each organ, energy of single tree and the standing crop of energy of Sassafras tsumu (Hemsl.) Hemsl. in the natural regenerated forest of S. tsumu were analysed. The results indicated that there were differences in caloric values of different organs, in which the caloric value of leaf was the highest and trunk the lowest. The energy models of S. tsumu were set up by investigating and analyzing the average tree in different diameter grades. The energy of trunk, branch, root and tree has a significant relationship with D and D^(2)H except for the leaf. The vertical distribution of energy showed over 70% energy of trunk was stored under half, but the energy patterns of the branch in different diameter grades were different, which the most energy of branch was stored upper half at big diameter grades and was contrary at middle-small diameter grades. The standing crop of energy of S. tsumu was 1.23×10^(6) kJ·hm^(-2), which was mostly concentrated in the trunk (72.58%), the root (20.15%) and scarcely in the branch (7.08%) and the leaf (0.19%).
出处
《植物资源与环境学报》
CAS
CSCD
2004年第2期36-39,共4页
Journal of Plant Resources and Environment
基金
福建省科学技术厅重大资助项目(2001F007
2001Z025)
关键词
天然更新
檫木
能量
模型
群落
樟科
Sassafras tsumu (Hemsl.) Hemsl.
caloric values
model
energy
