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本文对四川盆地紫色土区人工桤柏林桤柏木混交的光合生理生态机理进行了探讨。研究表明 ,桤、柏木混交的光合生理生态机制在于 :桤、柏木的光合作用在日变化和季节变化上存在时间匹配效应 ,在林木结构上存在光合作用的空间匹配效应 ,因而使桤柏木能充分有效地利用林地上各层次水平的光能资源 ,大大提高混交林群体的光能利用效率 ,使之成为川中丘陵紫色土区的高产林分类型。研究还表明 ,桤柏混交林林冠光合作用的日变化和季节变化进程基本上与桤木的变化趋势一致 ,这主要由桤柏木的生物生态学特性决定 ;桤柏林林冠光合作用主要受气温、光照和CO2 浓度的影响 ,湿度因子的影响相对较小。
In this paper, the photosynthetic physiological and ecological mechanisms of Artemisia sclerotiorum and Cercidiphylim other mixed wood in purple soil of Sichuan Basin were discussed. The results showed that the photosynthetic physioecological mechanisms of the mixed plantations of C. arborescens and Cypress were: the temporal matching effects of photosynthesis on the diurnal variation and seasonal variation of P. arborecens and the spatial matching effect of photosynthesis on the forest structure, Effective use of light energy resources at all levels of forest land, greatly improving the efficiency of light energy use of mixed forest groups, making it a high yield forest type of purple soil in the hilly area of central Sichuan. The study also showed that the diurnal and seasonal changes of photosynthesis of alder and cypress mixed forest were basically the same as that of Alnus cremastogyne, which was mainly determined by the biological characteristics of Alnus cremastogyne. The photosynthesis of Capitaka canopy forest was mainly affected by temperature, light And CO2 concentration, the influence of humidity factor is relatively small.