春小麦单叶气孔行为及蒸腾作用的模拟

SIMULATION OF STOMATAL BEHAVIOUR AND TRANSPIRATION OF SINGLE LEAF OF SPRING WHEAT

A synthesis model of single leaf stomatal movement has been established based on the theory of Jarvis and field observations of various environmental factors such as solar radiation and water vapour deficit etc. for spring wheat. Theoretical analysis of the model shows that the sensitivity of stomatato to various factors is in the following order: (1) radiation, leaf temperature, leaf water potential and water vapour deficit at low solar radiation intensity and (2) leaf temperature, leaf water potential, solar radiation and water vapour deficit at high solar radiation intensity. Furthermore, another function describing single leaf transpiration rate has been deduced from the stomatal model. A comparison between the data calculated by this model and by modified Penman-Monteith equation and the observed data demonstrate that the observed data were slightly higher than the data calculated by this model and were slightly lower than those by modified Penman-Monteith equation.