中文摘要：

利用土壤水分特征曲线仪测定河北栾城农业生态系统试验站三组土样的含水量及其对应负压值，分别利用6种不同模型进行了土壤水分特征曲线拟合。通过6种土壤水分特征曲线模型的拟合值与实测值差异对比认为，不同土样的最优土壤水分曲线模型不同。栾城土壤水分特征曲线拟合效果最好的模型是：原状粉质粘土为原始Van Genuchten模型；而扰动土为修正的Van Genuchten模型。

英文摘要：

Soil water content and the corresponding value of tension are obtained using the device of soil water characteristic curve through testing of three kinds of soil samples from the Agricultural Eco-System Experiment Station in Luancheng City, Hebei Province. Water characteristic curve is simulated using 6 kinds of models, and the relationship between soil water content and tension is expressed by the six different models. Through comparison of the water content simulated and observed, it is drawn that for different soil, the optimal characteristic curve model is different. For the original soil sample, the best simulation model is the model Van Genuchten. While for the disturbed soil sample, the best simulation model is the modified model Van Genuchten.