摘要
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.
The transpiration rate and stomatal conductance of tea tree are varied with its cultivars and leaf position. Cultivars with stronger drought resistance have a lower stomatal conductance, and fish leaf has a similar or higher transpiration rate and stomatal conductance than true leaf. The transpiratidn rate of tea leaf is highest in summer and autumn, second in spring, and lowest in winter. On clear days, the diurnal fluctuation of transpiration rate and stomatal conductance of tea leaves shows a single peak, being highest before and after noon, and related significantly to photon flux density, leaf temperature and vapor pressure deficiency. Photon flux density has a significant effect on transpiration rate and stomatal conductance.
出处
《应用生态学报》
CAS
CSCD
1995年第4期349-354,共6页
Chinese Journal of Applied Ecology
基金
安徽省教委基金
关键词
茶树
蒸腾速率
生态因子
Tea tree
Transpiration rate
Stomatal conductance
Ecological factor.