Characteristics of Soil Moisture Variation in Agroforestry in Karst Region

The special above-ground and underground dual structure in the karst area makes capacity of surface water storage this poor. In water-limited ecosystems, soil moisture is key to survival plants. Influenced by rainfall texture, variation characteristics different vegetation types are slope land. Many researchers use simulation experiments study influence movement processes under patterns, but there few studies natural conditions. paper, wood trees, peach flue-cured tobacco, grassland were planted at buffer zone boundary Shibing, a World Heritage site, along elevations depression research site. Peach trees tobacco main cash crops area. layers 0–0.15 m, 0.15–0.30 0.30–0.45 0.45–0.60 0.60–0.75 m taken as objects. Rainfall monitored every ten minutes patterns. Through analysis physicochemical properties types, it was found that changes land types. general, shallow (0~0.30 m) more active wet season (CV > 10%) tended be stable dry season. rainy had greatest on change. response level all tobacco. These results can provide ecological economic suggestions for areas with large population distribution China, so reduce impact rock desertification