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本文比较分析了养分经验模型和动态模拟模型的原理和计算方法。比较典型的经验模型有肥料效应函数方程,目标产量法,以及基于土壤肥力指标的QUEFTS(QUantitative Evaluation of the Fertility of Trop ical Soils)养分模型等。经验模型的特点是简单易行,所需参数少,但模拟精度难免误差较大;动态模拟模型由于考虑到复杂因素对作物养分吸收的影响,以及植物营养的动态过程,更能反映的系统真实行为。然而,由于土壤养分运移和作物养分吸收过程的复杂性,目前除氮外,还很难做到其它养分的动态定量化模拟,这些都还有待于更深入的基础性研究。
This paper comparatively analyzed the principle and calculation method of nutrient empirical model and dynamic simulation model. More typical empirical models include the fertilizer effect function equation, the target yield method, and QUEFTS (QUANTitative Evaluation of the Fertility of Tropical Soils) nutrient model based on soil fertility indicators. The empirical model is characterized by its simple and easy operation and less required parameters, but it is inevitable that the accuracy of the simulation is relatively large. The dynamic simulation model can better reflect the system reality by taking into account the influence of complex factors on crop nutrient uptake and the dynamic process of plant nutrition behavior. However, due to the complexity of soil nutrients transport and crop nutrient uptake, it is still very difficult to dynamically and quantitatively simulate other nutrients except for nitrogen, which still needs further basic research.