C3、C4植物叶片净CO2同化速率的模拟及其对环境因子的响应

摘要

Basic structure and algorithm of leaf mechanism photosynthesis model were described in first part of this study based on former researcher results. Then, considering some environmental factors influencing on leaf photosynthesis, three numerical sensitivity experiments were carried out. We simulated the single leaf net CO2 assimilation, which acts as a function of different light, carbon dioxide and temperature conditions. The relation-ships between leaf net photosynthetic rate of C3 and C4 plant with CO2 concentration intercellular, leaf temperature, and photosynthetic active radiation (PAR) were presented, respectively. The results show the numerical experi-ment may indicate the main characteristic of plant photosynthesis in C3 and C4 plant, and further can be used to integrate with the regional climate model and act as land surface process scheme, and better understand the in-teraction between vegetation and atmosphere.%本文首先模拟建立了叶片光合作用机制模型，然后，考虑环境因子对叶光合作用的影响，进行了三种敏感性试验，包括C3、C4植物叶片净CO2同化速率对胞间CO2浓度、叶片温度和光合有效辐射（PAR）的影响。结果表明数值模拟的叶光合作用机制模型可以指示C3、C4植物的光合作用的主要特征，进一步可以作为陆面过程模式的一部分耦合到区域气候模型中，更好地研究植被和大气的相互作用关系。