When the infiltration ammonium concentration is high, the main factors are nitration of ammonium nitrogen by biological actions, dispersivity and permeability of the soil.
当入渗铵态氮浓度较大时，影响铵态氮迁移转化的显著因素是生物作用导致的铵态氮的硝化，以及土壤的渗透系数、弥散度等因素。
Neither ammonium nitrogen nor nitrate nitrogen with high concentration in the medium helped to the growth of bacteria.
培养基中高浓度的氮不论是铵态氮还是硝态氮均不利于菌株的生长；
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