The rank order of the concentrations of different nitrogen species of porewater in different layers from different treatments was the lower layer>the medium layer>the top layer, but the concentrations of ammonia and nitrate of sediment were disciplinary.
The rank order of the concentrations of different nitrogen species of porewater in different layers from different treatments was the lower layer>the medium layer>the top layer, but the concentrations of ammonia and nitrate of sediment were disciplinary.
不同处理不同层次的间隙水中，各形态氮含量均为下层＞中层＞上层，但沉积物中氨氮和硝态氮含量变化规律不明显。