应用山口模型反求吸附作用存在时饱和土壤的硝化速率

本研究将山口等提出的反有限差分模型进行了扩展，推广应用于有吸附作用存在时一维饱和土柱中ＮＨ４＾－Ｎ的硝化作用速率的求解，并与有关试验资料和文献进行了对比。结果表明，只要注意浓度剖面取样点间距的布设和模型时、空离散步长的选取，扩展后的模型可用来估算稳态水流条件下存在吸附作用时的土壤硝化速率。

Yamaguchi's Model for an Inverse Solution of Nitrification Rate from the Nitrogen Transport Experiment in Saturated Soil Under the Existence of Adsorption

The inverse finite difference model (IFDM ) suggested by Yamaguchi et al (1992) is expanded into solving nitrogen nitrification rate in soil column leaching experiments at steady water flow. The calculated values are compared with the reference values, which are obtained from the observed data of Feng Shaoyuan et al (1995) and the parameters of Myrold et al (1986). The results show that if we take notice of selecting the distance of sampling points in measured concentration profile, and the time and space steps in calculation, this model can be used for estimating the soil nitrogen reaction rates in saturated soil, in which the adsorption of NH-N exists.