GROWTH STRATEGY OF TREES RELATED TO SUCCESSIONAL STATUS I. ARCHITECTURE AND EXTENSION GROWTH
GROWTH STRATEGY OF TREES RELATED TO SUCCESSIONAL STATUS I. ARCHITECTURE AND EXTENSION GROWTH
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与演替状态相关的树木生长策略 I. 结构和扩展生长
DOI：
10.1016/0378-1127(82)90035-4
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发表时间：
1982
影响因子：
3.7
通讯作者：
P. Ramakrishnan
中科院分区：
文献类型：
--
作者：
R. Boojh;P. Ramakrishnan
对印度东北部西隆上段（海拔 1900 米）亚热带山地湿润常绿森林中早期（Alnus nepalensis 和 Schima khasiana）和晚期（Machilus kingii、Quercus dealbata 和 Q. griffithii）演替树种的结构和生长模式进行了分析，并将其与它们在森林生态系统中的生态位占据的生态策略相关联。在早期演替物种中，建筑发育模式和生长设计旨在最大限度地提高高光环境下的产量。这些树木的枝条生长模式不确定，生长期长，具有较大的延伸生长和节律性（除了连续生长的尼泊尔A.nepalensis），并且主要通过syllepsis分枝。这些物种强调垂直生长，但牺牲了横向扩展。相比之下，后期演替物种在确定的方案下进行适度的生长，在生长季节的短暂时期内，生长仅限于预先形成的芽原基。生长节律性较差，分枝的产生是通过不孕进行的。这些物种强调横向传播，作为对高度竞争环境的适应。在森林环境中，这些物种仅具有一次确定的枝条生长冲刷，但在开放环境中，有两次这样的冲刷。研究发现，分叉比值在森林和开放环境中有所不同，这表明该物种具有调整其结构以适应光照条件变化的能力。
The architecture and growth pattern of early (Alnus nepalensisandSchima khasiana) and late (Machilus kingii, Quercus dealbataandQ. griffithii) successional tree species in a sub-tropical montane, humid, evergreen forest at Upper Shillong (1900 m) in north-east India were analyzed and related to their ecological strategy for niche occupancy in the forest ecosystem. In the early successional species the architectural development pattern and growth design are geared to maximize production under high light environments. These trees have an indeterminate pattern of shoot growth, a prolonged growth period with greater extension growth and rhythmicity (except forA. nepalensiswith continuous growth) and branch mainly by syllepsis. These species emphasize vertical growth at the expense of lateral spread. In contrast, the late successional species make modest growth under a determinate scheme, the growth being confined to preformed bud primordia for a brief period of the growing season. There is less rhythmicity in growth and branch productin is by prolepsis. These species emphasize lateral spread, as an adaptation to highly competitive environments. In forest situations these species have one determinate flush of shoot growth only but in open situations there were two such flushes. Bifurcation ratio values are found to vary in forest and open situations, suggesting the capacity of the species to adjust their architecture to changed light conditions.