红鳞蒲桃季雨林重要树种的物候特征

Phenological Characters of Dominant Trees in Syzygium hancei Monsoon Forest

在广西海岸巫头村野生红鳞蒲桃（Szygium hancei Merr．et Perry）季雨林中选择重要值较大的红鳞蒲桃、膝柄木（Bhesa robusta（Roxb）D．Hou）、滨木患（Arytera littoralis Bl．）和紫荆木（Madhuca pasquieri（Dubard）Lam．）4个树种进行物候观测研究，结果表明：各树种繁殖生长指数（尺／y）以红鳞蒲桃1．4最适宜，膝柄木0．7投入不足，紫荆木5．0投入过大，后两者是濒危植物。红鳞蒲桃和膝柄木在2～3月出新梢，温度是主要影响因子；紫荆木在5月出新梢，降水量和日照时数是主要影响因子。膝柄木9月开花，旱季来临的信号是触发因子。红鳞蒲桃、滨木患和紫荆木均在雨季开花，4个树种的果期均出现在一年中的旱季。

A research on phenology of 4 dominant trees of Syzygiurn hancei,Bhesa bobusta, Arytera littoralis and Madhuca pasquieri was conducted in the wild Syzygiurn hancei monsoon forest patch which distribute in Wutou village along Guangxi west coast. The results show that the ratios of Reproductive phase to Vegetative growth phase （R/V index） are varied in different species. The R/V index of S. hancei （1.4） is regarded as optimum for its biggest dominance in the community,meanwhile the R/V index ofB. bobusta （0. 7） and ofM. pasquieri （5.0） are de- viant, and the two latter are both endangered species,too. S. hancei and B. robusta flushing dur- ing February to March is triggered by the change of mean temperature. M. pasquieri flushing in May is caused by the variation of precipitation and hours of sunshine. B. robusta begins flowering in September is triggered by the dry signal while the other 3 species flower in rainy season. All the four species bear fruits in dry season.