生态公益林不同树种光适应特征研究

The Characteristics of Light Acclimation for the Wood Species in Ecologic Forest

于广东省东莞市植物园3个不同郁闭度处理的生态公益林改造样地,观测了18个树种光合响应曲线与生长量指标。并通过模型拟合求得其最大光合速率(Am)、光补偿点(LCP)、光饱和点(LSP)以及表观量子产量(Φ)等光合参数以及它们之间的相关性,根据这些参数推断其喜光和耐荫性。最后将这些树种的光适应性归溪3大类:喜光类、喜光耐荫类和耐荫类。并根据这些树种的生长指标及其生物生态学特性,提出在进行生态公益林林分改造的树种选择时应注意的问题:一是根据不同林分选择相应的改造树种;二是依据群落动态演替规律进行树种配置。

In Dongguan Botanic Garden, Dongguan, Guangdong, the characteristics of light acclimation and growth rate for 18 wood species in ecologic forest were studied. The photosynthetic parameters and their correlation among them, for example, maximum net photosynthesis （Am）, light compensation point （LCP）, light saturating point （LSP） and apparent quantum yield （Ф） et al. were obtained from some empiristie equations and models. With view of those parameters, the characteristics of light preference of those wood species were deduced. Those species were divided into three groups in view of their light acclimation： sun; sun and shade-tolerant; shade-tolerant. According to the light acclimation and growth rate, consult some references, adviees were put forward to the protection, rebuilding and building of ecological forest, as follows： choosing the adaptive species according to the different forest, and configuring species in light of dynamic succession and trend of communication.