盐渍化灌区耕荒地间水盐均衡试验分析

In this study water and salt transport were studied in the irrigated field and uncultivated land of Hetao Irrigation District in Inner Mongolia province. Based on field experiments, Water and salt transport mechanism of the irrigated field and uncultivated land was analyzed in the irrigation district. Meanwhile, water and salt transport dynamics and salt accumulations were simulated with water balance and salt balance model, receptively. Results show that the input/output of water and salt of field and uncultivated land were balanced approximately in growth season. There was irrigation water was transported to adjacent uncultivated land through lateral groundwater recharge, and then the water was consumed by evapotranspiration. The salt accumulation process was both occurring during crop growth season. Salt accumulation of irrigated field and uncultivated land was 74 g/m2 and 400 g/m2, respectively. Consequently, the uncultivated land in the irrigation district was an important factor in water/salt balance progress as salt storage area. It is significent to water and salt dynamic research in arid area.