小麦物质生产与积累的模拟模型

A Simulation Model of Photosynthetic Production and Dry Matter Accumulation in Wheat

采用高斯积分法模拟小麦冠层每日的总光合同化量 ,并经呼吸消耗与物质转化形成生物量。同时考虑了温度、水分、CO2 浓度、生理年龄和 N素丰缺对光合作用的影响。建立了植株临界 N浓度、最小 N浓度和生理发育时间的曲线关系。采用不同地点不同品种不同处理的试验对模型预测的生物量进行比较 ,结果表明 ,模拟值与实测结果吻合很好 ,相对误差小于 8%。

Daily total canopy photosynthetic rate was simulated by Gauss integration, and total biomass was subtracting respiration and transformation from it. The effect of daily temperature, water, CO 2 concentration, plant age and nitrogen deficit on photosynthesis rate were considered. The relationships of plant critical and minimum nitrogen content to physiological development time were also established. The simulated results of different position, varieties and treatments showed the relative errors of predicted to observed biomass were less than 8 percent.