【摘要】 在干旱胁迫条件下,沙生植物白剂叶片气孔扩散阻力和蒸腾速率昼夜变化是双峰曲线。对白刺进行灌水和不灌水处理,结果表明:叶片气孔扩散阻力除8:00点外,差异性极显著;蒸腾速率在白天具有十分显著的差异性。经实测和数据分析得出白刺叶片气孔扩散阻力和蒸腾速率对光照强度、大气湿度、大气温度和叶温反应的数学模型。实验结果表明:该模型与实测误差在25%左右,由此可见,它具有较好的预测性。更多还原

【Abstract】 Under the arid condition,the diurnul changes of the Nitraria tangutoram~sstomatal resistance and the transpiration rate present twice highleaf peakvalue. Some of the experiments have been made by watering Nitrariatangutoram and the results indicate that the difference of the leaf stomatalresistance is tremendous during the day time except at eight o’clock, so isthe transpiration rate. By means of the field survey and by anay lising thedate, a math model of Nitraria tangutoram’s leaf stomatal resistance andtranspiration rate to the reactions of illumination, intensity, atmosphere,humidity, atomosphere temperature and leaf temperaturehas the model andbeen obtained. the result of the experiments also show that the error betweethe field survey is only about 25%which that is of betterfunction offorecast.更多还原