Abstract: In order to improve the prediction capability of vegetation interface process (VIP) model, some parameterization schemes were updated, including the descriptions about the root depth with sinusoid of relative development stages, the root distribution density in soil depths, and the specific leaf area (SLA) variation in growth stages. The improved model was used to simulate the leaf area index, plant biomass, and soil moisture content at the Luancheng Agricultural Station in Hebei Province, and validated by the field observation data during the same periods. The results showed that the model performances in simulating soil moisture content, leaf area  index, and other state variables were improved.

Key words: Organic materials, Cucumber, Seedling disease, Soil microorganism