温室滴灌条件下甜瓜气孔阻力变化规律研究

Variation Rule of Stomata Resistance of Mask-melon under Drip Irrigation in Greenhouses

通过田间试验 ,研究滴灌条件下日光温室内甜瓜叶片气孔阻力时空变化规律 ,并建立基于温室环境要素 (光照和饱和水汽压差 )的气孔阻力模型 ,并对通过控制冠层气孔行为来实现温室环境优化调控的方法进行了讨论。研究表明 :单叶片叶尖偏下和叶基偏上部位部分气孔阻力具有一定的代表性 ;在垂直方向上 ,顶 4叶与气孔平均值相接近 ,具有一定的代表性 ;甜瓜气孔阻力日变化近似呈“W”形。

Space and time variation rule of stomata resistance of mask_melon leaf under drip irrigation in solar greenhouse is researched through field experiment. The stomata resistance model is also established based on environment factors such as radiation and vapor pressure deficit, and the method of the optimal greenhouse environment regulation through control of crown stomata is discussed. The results show that the stomata resistance at the foliar tip and base is representative; the stomata of top four leaves is close to the average value, and it is also representative; the daily variation trend of stomata of mask melon has the shape of 'W'.