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本文利用禹城综合试验站土壤 -植物 -大气连续体系统综合观测场冬小麦田间实测资料 ,对“SPAC系统中水热、CO2 通量与光合作用的综合模型 (Ⅰ )模型建立”一文所建立的模拟土壤水分动态、蒸发蒸腾和冠层CO2 通量等功能进行了验证 .利用波文比观测水汽通量结果、土壤水分剖面监测结果分别对模拟计算腾发量和土壤水分剖面的验证结果表明 ,模拟计算的腾发量和土壤水分剖面是比较准确的 ;将模拟的光合作用过程中的CO2通量与实测值对比表明 ,模拟值与实测值的变化趋势是一致的 ,但是数量上存在一定的差异 .模拟光合作用过程和强度符合一般规律 .总体说明 ,所建立的系统模型在上述功能的模拟上是可行的
In this paper, we use the measured data of winter wheat field in the integrated observational field of soil-plant-air continuum in Yucheng Comprehensive Experimental Station to establish a comprehensive model of water heat, CO2 flux and photosynthesis in SPAC system. Simulation of soil moisture dynamics, evapotranspiration and canopy CO2 flux were validated.Using the BV ratio to observe the water vapor flux results and the soil moisture profile monitoring results, the validation results of simulated evapotranspiration and soil moisture profile, respectively, The simulated evapotranspiration and soil moisture profiles are more accurate. Comparing the simulated CO2 fluxes with the measured values in the photosynthesis process shows that the trend of the simulated and measured values is consistent, but there is a certain amount of Difference.The simulated photosynthesis process and intensity are consistent with the general rule.Overall description of the system model established is feasible in the simulation of the above functions