Plateau cultivated soil and gully cultivated soil from the northern part of Wangdong hilly-gully region in Changwu lab-station of CERN was used as research soil.The nitrogen migration and its time-space variation of intact soil core in arid agriculture ecosystem in loess plateau were studied.The results are: the content of NO3--N was from 23.1 to 33.8 mg/kg,NH4+-N from 0.23 to 0.50 mg/kg,DOC from 9.17 to 13.38 mg/kg,P from 0.18 to 0.23 mg/kg.In arid cultivated soil,NO3--N and NH4+-N mainly concentrate in to...
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