田间一些大型向日葵叶片扩散阻力的估算。
Estimates of the diffusion resistance of some large sunflower leaves in the field.
作者信息
Hunt L A, Impens I I, Lemon E R
机构信息
Microclimate Investigations, SWC, ARS, USDA, Tower Road, Ithaca, New York 14850.
出版信息
Plant Physiol. 1968 Apr;43(4):522-6. doi: 10.1104/pp.43.4.522.
Studies were made of resistance to gaseous exchange between large sunflower leaves and the bulk air in a crop canopy. Two components of the diffusive pathway for mass and sensible heat were evaluated; A) the resistance from the interior of the leaf to the leaf surface, and B) the resistance from the surface of the leaf through the leaf boundary air layer to the bulk air.IT WAS FOUND THAT: A) leaf resistance not only displays diurnal trends but shorter fluctuations, and B) boundary air layer resistance was significantly smaller than predicted from classical boundary layer formulae.
对大型向日葵叶片与作物冠层中的大气之间的气体交换阻力进行了研究。评估了质量和显热扩散路径的两个组成部分；A）从叶内部到叶表面的阻力，以及B）从叶表面穿过叶边界空气层到大气的阻力。研究发现：A）叶阻力不仅呈现昼夜变化趋势，而且还有较短时间的波动，B）边界空气层阻力明显小于根据经典边界层公式预测的值。
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