水稻光合生产与干物质累积的动态模拟

在综合已有研究成果的基础上，兼顾模型的机理性与实用性的平衡，构建了水稻光合生产与干物质累积的模拟模型．模型采用高斯积分法有效地计算冠层每日的总光合量，并考虑了冠层消光系数随生理发育时间（PDT)的动态变化，模型较充分地量化了生理年龄、温度、叶片含氮量及水分亏缺因子等对光合作用的影响及维持呼吸系数与PDT的动态变化关系、利用独立的试验资料对模型核实的结果显示，模型可以较好地预测不同生长条件下的生物量累积动态，具有较强的机理性与实用性．

Dynamic Simulation on Photosynthetic Production and Dry Matter Accumulation in Rice

Based on the existing models and published research results, considering the balance between explanation and application, a simulation model for rice photosynthesis and dry matter production is established. In the model, Gauss integration is used to effectively calculate daily canopy photosynthesis and dynamic change in the canopy extinction coefficient over development progress is incorporated to characterize the physiological development time (PDT). Also, the effects of physiological age represented by PDT, temperature, leaf nitrogen content and water deficit factor on the maximum photosynthetic rate are adequately quantified, respectively. The maintenance coefficient which declines as physiological age is also expressed as a function of PDT. Validation of the model using independent data sets show that the model could well predict the accumulation dynamic of biomass under diverse environments the physiological development time (PDT).