论文部分内容阅读
为了筛选适合华北典型地区冠层阻抗基于叶片气孔导度的提升方法,依据两个生长季的冬小麦田间试验资料,以Leuning-Ball和Jarvis叶片气孔导度模型为基础,构建了冠层阻抗估算模型,对比了不同冠层阻抗估算模型的应用效果.结果表明:冬小麦叶片气孔阻抗日变化整体高于冠层阻抗,两者具有显著的尺度差异性;Leuning-Ball气孔导度模型能够更好地解释气孔导度对环境因子的响应;以光合有效辐射作为尺度转换因子,基于Leuning-Ball气孔导度模型提升的冠层阻抗估算模型能够有效地模拟冠层阻抗,可应用于华北典型地区冬小麦水汽传输阻抗尺度提升研究.
In order to screen the canopy impedance based on leaf stomatal conductance in typical areas of North China, based on the winter wheat field test data in two growing seasons, based on the Leuning-Ball and Jarvis leaf stomatal conductance models, the canopy impedance estimation model , And compared the application effects of different canopy impedance estimation models.The results showed that the diurnal variation of stomatal impedance of winter wheat leaves was higher than that of canopy impedance and both had significant scale differences.The Leuning-Ball stomatal conductance model could be better explained Stomatal conductance response to environmental factors. Using photosynthetically active radiation as a scaling factor, the canopy impedance estimation model based on the Leuning-Ball stomatal conductance model can effectively simulate the canopy impedance and can be applied to the winter wheat moisture transport in typical areas of North China Impedance scaling enhancement research.