Simulating leaf net CO₂ assimilation rate of C₃ & C₄ plants and its response to environmental factors

Abstract

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 relationships 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 experiment 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 interaction between vegetation and atmosphere.

Keywords

Photosynthesis model / Net CO₂ assimilation rate / C₃ and C₄ plants / Numerical simulation / Q945.11 / Q948.112 / A