【摘要】 采用Li-6400便携式气体分析系统,对一年生中国柽柳叶片的净光合速率(Pn)、气孔导度(Gs)和蒸腾速率(Tr)进行测定,并分析了三者的相互关系。结果表明,在光照充足条件下,中国柽柳叶片Pn、Gs日变化均呈双峰曲线、Tr的日变化为单峰曲线。中国柽柳叶片Pn与大气温度(Ta)、Gs、Tr、大气CO2浓度(Ca)有较明显的正相关关系,与大气相对湿度(RH)有较明显的负相关关系。更多还原

【Abstract】 Photosynthetic rate(Pn),stomatal conductance(Gs) and transpiration rate(Tr) were investigated in one-year-old Tamarix chinensis Lour.by using Li-6400 photosynthesis analyzer system.The relationships of them were also analyzed.The results revealed that in the typical sunny days,both of them present double-peak curve of the daily variation of net photosynthetic rate and stomatal conductance.However,it presents single-peak curve of the daily variation of transpiration rate.There a positive correlation between the photosynthetic rate and the atmospheric temperature,Gs,Tr,and the CO2 concentration in air,while there was a negative correlation with RH in Tamarix chinensis Lour..更多还原