Scientia Agricultura Sinica ›› 2004, Vol. 37 ›› Issue (10): 1492-1496 .doi: 10.3864/j.issn.0578-1752.041015

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

Study on Soil Denitrification in Winter Wheat-Summer Maize Rotation System

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  1. 北京市农林科学院植物营养与资源研究所
  • Received:2004-02-11 Revised:1900-01-01 Online:2004-10-20 Published:2004-10-20

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Abstract: Soil denitrification was studied in winter wheat-summer maize rotation cropping system with an aquic cambisol. Results showed that the N loss amount by denitrification ranged from 4.7 to 9.7 kg·ha-1 with different rates of fertilizer nitrogen. The key stage of denitification was during summer maize-growth-period, especially within 1-2 weeks after fertilizer nitrogen was applied. Similar trend was found between soil N2O production/emission dynamic and denitrification dynamic in the rotation system. This may indicate that N2O mainly produced in nitrification process.

Key words: Aquic cambisol, Winter wheat, Summer maize, Denitrification, N2O

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