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用整株容器法研究了红壤坡地茶园的蒸腾作用 ,结果显示 :(1)茶园蒸腾速率具有明显的早晚低、中午高的日变化特征 ,但在不同的日期蒸腾速率日变化曲线存在一定差异。 (2 )蒸腾速率受诸多田间小气候因子的影响 ,相关分析及多元逐步回归分析表明 ,气温与净辐射是影响茶园蒸腾作用的 2个主要气象因子。 (3)蒸腾速率与叶片气孔导度关系密切 ,且随着气孔导度的增加 ,蒸腾速率增大。最后探讨了植物蒸腾驱动力及其抑制的可能性及气孔行为的调节与水分利用。
The transpiration of tea plantation on red slope sloping land was studied by the whole container method. The results showed that: (1) The transpiration rate of tea plantation had obvious diurnal variation characteristics of morning and evening low and noon high, but there were some differences in diurnal variation curves of transpiration rate at different dates. (2) The transpiration rate was affected by many microclimate factors in the field. Correlation analysis and multivariate stepwise regression analysis showed that air temperature and net radiation were the two main meteorological factors affecting the transpiration of tea plantation. (3) The transpiration rate was closely related to leaf stomatal conductance, and transpiration rate increased with stomatal conductance increasing. Finally, the driving force of plant transpiration and its inhibition and the regulation of stomatal behavior and water use were discussed.