大亚湾红树林研究Ⅱ,澳头港部分红树植物的生态生理

对大亚湾澳头港的３种红树植物的光合速率、呼吸速率和蒸腾速率进行测定，结果表明：桐花树、白骨壤和木榄的光合速率日进程呈双峰曲线，日平均光合速率的大小为桐花树＞木榄＞白骨壤，而日均呼吸速率的大小为桐花树＞白骨壤＞木榄，呼吸速率的变化幅度小于光合速率，提示白骨壤的生产力最低，可能与其所处的生境含盐量更高有关。蒸腾速率日进程呈单峰曲线，且泌盐植物桐花树和白骨壤的日均值很接近，都高于拒盐种木榄，表明蒸腾速率与它们的泌盐或拒盐生理特性密切相关。总体上，这些红树植物具有较高的光合速率、较低的呼吸速率和蒸腾速率，有利于生长在盐渍淹水的特殊海滩环境。

STUDIES ON MANGROVES AT DAYA BAY PART TWO:ECO-PHYSIOLOGY OF SOME MANGROVE PLANTS AT AOTOU PORT

The rates of photosynthesis, respiration and transpiration of three mangrove plants growing at Aotou Port of Daya Bay were determined. The results show that the diurnal changes of photosynthetic rates present curves of two-peak, The order of means are Agiceras corniculatum >Bruguiera gymnorrhiza > Avicennia marina. The Change ranges of respiratory rates are smaller than that of photosynthetic rates of all three species. Different from photosynthesis, the order of means of respiratory rates are A. Corniculatum >A. marina > B. gymnorrhiza. These suggust that A. marina has the lowest productivity among the three species and it may be related to the harsher habitat which A. marina grows. Transpiration rates appear curves of one peak. Due to the salt-secreting or salt-excuding species, the means of A. corniculatum is close to A. marina and higher than that of B. gymnorrhiza. In general, these three mangrove plants have high photosyntic rates, low respiratary and transpiration rates and are survivals of the special habitat of salt and inundation.