Scientia Agricultura Sinica ›› 2007, Vol. 40 ›› Issue (1): 107-113 .

• SOIL & FERTILIZER·WATER-SAVING IRRIGATION • Previous Articles     Next Articles

Influence on mineralization of carbon and nitrogen after dissolved organic carbon removed in Paddy soils in subtropical China

ChengWei Han,   

  1. 中国科学院南京土壤研究所土壤与农业可持续发展国家重点实验室
  • Received:2006-06-14 Revised:1900-01-01 Online:2007-01-10 Published:2007-01-10
  • Contact: ChengWei Han

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Abstract: Abstract Laboratory analysis was conducted to investigate the influence of removal of dissolved organic matter (DOM) of paddy soils in subtropical China on the mineralization of carbon and nitrogen .The results showed that the mineralization of soil organic carbon decreased after DOM removed but the influence is unnotable. The mineralization of soil organic nitrogen decreased 11～18.3%（even 13.6%）,The difference is distinct .This data illustrate that whilst DOM is a small component of the soil OM ,it plays a significant role in in the transport and supply of nitrogen (N) to microbial populations.It is the initial substrate for these OM mineralization and considered important in the N mineralization.

Key words: paddy soils in subtropical China, dissolved organic matter, mineralization

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