红壤坡地茶园蒸腾速率及其环境影响因子的研究

试验研究红壤坡地茶园植株蒸腾作用结果表明 ,茶园植株蒸腾速率呈明显早、晚低 ,中午高的日变化趋势 ,且蒸腾速率日际变化有一定差异。气温与净辐射为影响茶园植株蒸腾作用的主要气象因子。蒸腾速率与叶片气孔导度关系密切 ,且随气孔导度的增加而增大。并探讨了植物蒸腾驱动力及其抑制的可能性 ,气孔行为的调节与水分利用效率。

A study on tea plant transpiration and its influencing factors in slop lands of red soil regions

The transpiration rate of tea plant was studied in slop lands of red soil regions. The results indicate that the daily variation of tea plant transpiration rate shows an obvious trend with a high value in midday and low values in the early morning and evening, however, there are some differences in the diurnal variation curves of tea plant transpiration rate in different days; the net radiation and air temperature are the two main factors affecting the transpiration rate of tea plant; there is a close correlation between the transpiration rate and stomatal conductance, and with the stomatal conductance increasing, the transpiration rate also increases. Finally, the transpiration driving factors, the probability of preventing transpiration, the stomatal action's regulation, and the water use efficiency of tea plant are discussed.