摘要
应用气孔计测定了福建九龙江口秋茄［Ｋａｎｄｅｌｉａｃａｎｄｅｌ（Ｌ）Ｄｒｕｃｅ］红树林的蒸腾强度、气孔导度和几个生态因子的日变化。结果表明：在晴天，秋茄的蒸腾强度和气孔导度变化幅度大，均呈明显的单峰曲线，但气孔导度先达到峰值，时间约在上午１０∶００，而后蒸腾强度才达到峰值，时间约为中午１４∶００；在阴天，蒸腾强度和气孔导度变化较平稳，它们几乎同时在中午１３∶００左右达到各自的峰值。秋茄的蒸腾强度、气孔导度与各生态因子的综合变化密切相关，对蒸腾强度影响极显著的因子是光子注量率、叶内外水汽压差和大气相对湿度。
Diurnal changes of transpiration and stomatal conductance of Kandelia candel mangrove forest and some ecological factors were determined by porometer in Jiulongjiang river estuary of Fujian Province. The results showed that in sunny days the diurnal changes of transpiration and stomatal conductance were all of single peak curves, with the time points to arrive at the peak values differring: 10:00 in the morning for stomatal conductance, 14:00 in the afternoon for transpiration; and that in cloudy days the diurnal changes of transpiration and stomatal conductance were steady with the time points to arrive at the peak values being the same the 13:00 in the afternoon. It is concluded that transpiration and stomatal coductance were obviously influenced by some ecological factors. The critical factors affecting transpiration remarkably were photon fluence rate, leaf-air vapour pressure and air relative humidity.
出处
《湖北农学院学报》
1998年第3期204-208,共5页
Journal of Hubei Agricultural College
基金
国家自然科学基金
关键词
秋茄
蒸腾强度
气孔导度
生态因子
红树林
andelia candel
transpiration
stomatal conductance
ecological factors
