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Chinese Journal of Applied Ecology ›› 1995, Vol. 6 ›› Issue (s1): 67-73.

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Relationship between Mn forms and active Mn in soils of north China

Ding Weixin   

  1. Institute of Soil Science, Academia Sinica, Naming 210008
  • Received:1993-08-17 Revised:1993-11-28 Online:1995-12-25 Published:1995-12-25

Abstract: Studies on the relationship between Mn forms Mn and active Mn in main soils of north China show that in alkaline soil, the amount of Mn forms is MnO-Mn>Res-Mn>OM>Mn>AFeO-Mn>FeO-Mn>Ex-Mn, which is obviously differed from that in acid soils.Under alkaline condition, soil Mn can be transformed from bioavailable to unavailable,and thus, active Mn mainly comes from Mn oxide and exchangeable Mn.

Key words: Chemical form, Mn, Active Mn, Soil factors, Alkaline soil