Hydrothermal Changes and Physicochemical Characteristics of Subtropical Subalpine Soils under Freezing and Thawing

The soil column samples were collected for indoor simulated freeze-thaw experiments to monitor the hydrothermal dynamics and measure basic physicochemical properties research effects of on process peat bog its relationship with properties. results indicate that in initial phase freezing-thawing, water content decreases temperature changes, respectively. Unfrozen stable freezing period sharply. Compared period, fluctuation moisture rate during thawing is more moderate change. Soil ammonium nitrogen decreasing significantly positively correlated after freeze-thaw, while total phosphorus, fast-acting nitrate have no significant correlation freeze-thaw.