| In order to explore the effect by mixed plants to soil water holding capacity, we have taken the soil from Jingtai, Gansu for the experimental material, set up four treatments with different plants mixed proportion (such as 1% corn cobs, 1% corn leaves, 3% corn cobs and 3% corn leaves), and use the centrifuge method to measure the soil water characteristic curve. At the same time, utilize the HYDRUS software to simulate and calculate. The results shown that: Under the treatment with same suction and mixed proportion, the soil volumetric water content with mixed proportion of 3% was higher than 1% soil; Under the same mixed proportion theatment, the soil volumetric water content mix
ed corn leaves was higher than mixed corn cobs soil, also the soil volumetric water content with all plants mixed treatments were total higher than the pure soil as without any mixed. Though the different model fitting analysis for the soil water characteristic curves, have indicated that the Van Genuchten model was the best fitting model for the four treatments. This research results can be provided a certain reference for exploring the rule of soil water and salt movement under plants mixed condition in this region. |