蒸发和灌水频率对土壤中NO(上标 - 下标 3)运移影响的研究

NO(superscript - subscript 3) transport in soils with or without evaporation under different irrigation frequencies was investigated through disturbed soil columns in lab. Results show NO(superscript - subscript 3) solute peaks in soil with or without evaporation all will get steeper, narrower, higher peak values and slower movement downward, and the depths of NO(superscript - subscript 3) solute peak and front is obviously shallower with evaporation than without evaporation as irrigation frequency increased. The effective water amount for leaching becomes less with stronger evaporation and higher irrigation frequency. The evaporation during intervals of irrigation and leaching decide the NO(superscript - subscript 3) transport and distribution in soils with different irrigation frequencies.