地理科学 ›› 1995, Vol. 15 ›› Issue (4): 398-373,394.doi: 10.13249/j.cnki.sgs.1995.04.398

• 研究报道 • 上一篇    

生物气候带对土壤中锰的赋存形态及其有效性的影响

丁维新   

  1. 中国科学院南京土壤研究所 南京210008
  • 收稿日期:1994-03-24 修回日期:1995-02-10 出版日期:1995-07-20 发布日期:1995-07-20

EFFECT OF BIOCLIMATIC ZONE ON MORPHOLOGY AND AVAILABILITY OF MANGANESE IN SOILS

Ding Weixin   

  1. Institute of Soil Science, Academia Sinca, Nanjing 210008
  • Received:1994-03-24 Revised:1995-02-10 Online:1995-07-20 Published:1995-07-20

摘要: 随着生物气候带由低纬度的热带、亚热带向高纬度的暖温带的过渡,土壤中活性锰的含量与代换态锰随着纬度升高而明显降低,且其存在的形态,南北方土壤迥异.

Abstract: The paper deals with the effect of bioclimatic zone on the morphology and availability of manganese in soils of China by using a sequential extraction method. The distribution of manganese in soil fractions varies with bioclimatic zone. The ratios of exchangeable Mn, amorphous iron oxides bound Mn and crystalline iron oxides bound Mn to total Mn in soils in China decrease slowly, however the ratio of Mn oxides to total Mn increases from tropical zone, subtropical zone to warm-temperate zone, temperate zone. the rate of organical bound Mn to total Mn shows another model, i. e. increase from tropical zone to subtropical zone and then decrease from subtropical zone to warm-temperate zone and temperate zone. The variation of available Mn in soils is the same as that of exchangeable Mn. The available Mn in acid soils in South China comes from ex-changeable Mn and organical bound Mn and mainly from Mn oxides and exchangeable Mn in alkaline soils of North Chian.