If all the transferable forms of nitrogen could take part in cycling in suitable conditions, their relative contributions to cycling decrease according to the orderof SOEF-N, IEF-N, SAEF-N and WAEF-N.

• 坐同一粒级沉积物中的可转化不同形态氮都能参与循环时，它们对氮循环的相对贡献从大至小依次为SOEF-N>IEF-N>SAEF-N>WAEF-N。