Infiltration Characteristics Under Different Land Uses in Yuanmou Dry-Hot Valley Area

摘要

On the basis of soil physical index determination of four land use types (arbor forest, shrub land, grassland, and bare wasteland) of Yuanmou dry-hot valley, the soil infiltration characteristics were studied. The results showed that there were differences on soil bulk density, soil porosity, initial soil water infiltration rate, and stable soil water infiltration rate. The steady infiltration rate and soil bulk density are exponential, Greater the soil bulk density, the lower the infiltration rate; smaller soil bulk density, the greater the porosity and porosity ratio, as well as the infiltration rate. Among different stands, It is observed from the research that from the average infiltration rate and steady infiltration rate, its order from high to low was arbor forest, shrub land, grass land, and bare wasteland.