C_3、C_4植物叶片净CO_2同化速率的模拟及其对环境因子的响应(英文)

Simulating leaf net CO_2 assimilation rate of C_3 & C_4 plants and its response to environmental factors

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。

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 sing le leaf net CO2 assimilation, which acts as a function of different light, carbo n dioxide and temperature conditions. The relationships between leaf net photosy nthetic rate of C3 and C4 plant with CO2 concentration intercellular, leaf tempe rature, and photosynthetic active radiation (PAR) were presented, respectively. The results show the numerical experiment may indicate the main characteristic o f 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 bett er understand the interaction between vegetation and atmosphere.