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茶树蒸腾速率和气孔导度因品种、叶位不同而异．抗旱性强的品种具有低的气孔导度；鱼叶的蒸腾速率和气孔导度接近或高于真叶．茶树叶片蒸腾速率夏、秋季最高，春季次之，冬季最低．在晴天，茶树蒸腾速率和气孔导度的日变化呈单峰型，以中午前后最高；其日变化与光量子通量密度、叶温、蒸汽压亏缺等因子显著相关；光量子通量密度对蒸腾速率和气孔导度影响较明显．
Tea tree transpiration rate and stomatal conductance due to the variety, leaf position varies. Drought-resistant varieties had low stomatal conductance; transpiration rate and stomatal conductance of fish leaves were close to or higher than that of true leaves. Tea leaf transpiration rate summer, autumn highest, followed by spring, winter lowest. On sunny days, the diurnal variation of transpiration rate and stomatal conductance of tea tree showed a single peak with the highest before and after noon. The diurnal variation was significantly related to the factors of photon flux density, leaf temperature and vapor pressure deficit. The effect of photon flux density on transpiration The effects of velocity and stomatal conductance are obvious.