论文部分内容阅读
森林凋落物(litterfall)是森林植物在其生长发育过程中新陈代谢的产物,在物质循环和能量流动方面起着重要作用。该文利用已发表的我国主要森林凋落物的研究数据,分析了不同组分(叶、枝和繁殖器官)凋落物量之间及其与总凋落物量之间的异速比例关系。结果表明:我国森林叶、枝和繁殖器官的平均凋落物量分别为3 810.34、1 019.07和767.95 kg·hm–2·a–1;温度、降水量、林龄对森林凋落物量均有一定程度的影响,其中温度对各组分凋落物量的影响最大。叶凋落物量(LL)与总凋落物量(LT)之间呈等速生长关系(LL∝LT0.96),繁殖器官和枝的凋落物量(分别为LP和LB)与LT之间呈异速比例关系,分别为LP∝LT1.84和LB∝LT1.61。不同组分凋落物量之间具有显著的异速比例关系,其异速指数均小于1.0。不同林型(常绿林和落叶林)各组分凋落物量之间的异速比例关系无显著差异。了解不同组分凋落物量与总凋落物量之间的异速比例关系可以为更加精确地估算森林生产力提供理论依据。
Litterfall is the product of the metabolism of forest plants during their growth and development and plays an important role in material circulation and energy flow. Based on the published data of forest litter in China, the relationship between the litterfalls of different components (leaf, shoots and reproductive organs) and their total litterfalls was analyzed. The results showed that the average amount of litter in the leaves, branches and organs of the forest in China was 3 810.34, 19019.07 and 767.95 kg · hm-2 · a-1, respectively. The temperature, precipitation and age had a significant effect on the litterfall Effect, the temperature on the litter of each component the impact of the greatest. (LLαLT0.96), litter amount (LP and LB, respectively) of propagating organs and shoots showed an isokinetic relationship with LT , Respectively, LPαLT1.84 and LBαLT1.61. There was a significant allometric relationship among the litterfalls of different components, and allotopic indexes were less than 1.0. There was no significant difference in the allometric ratios of the litterfalls between different forest types (evergreen forest and deciduous forest). Understanding the allometric relationships between the amount of litter and the amount of total litter can provide a theoretical basis for more accurate estimates of forest productivity.