Biology and Fertility of Soils

, Volume 48, Issue 8, pp 941–946 | Cite as

Wheat straw and its biochar have contrasting effects on inorganic N retention and N2O production in a cultivated Black Chernozem

Original Paper

Abstract

A laboratory incubation experiment was conducted to investigate the effects of direct incorporation of either wheat straw or its biochar into a cultivated Chernozem on gross N transformations calculated by the 15N pool dilution technique and nitrous oxide (N2O) production rates. Incorporation of wheat straw stimulated gross NH4+ (ammonium) and NO3 (nitrate) immobilization rates by 302 and 95.2 %, respectively, suppressed gross nitrification rates by 32.2 %, and increased N2O production by 37.7 %. In contrast, the addition of a biochar produced from the wheat straw did not influence any of the above N cycling processes. Therefore, application of biochar could be a possible management strategy for long-term C sequestration (through soil storage of stable C contained in the biochar) in soils without increasing N2O production rates, but could not effectively immobilize NO3 in the soil.

Keywords

Biochar Gross N mineralization NO3 immobilization N2O production 

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Copyright information

© Springer-Verlag 2012

Authors and Affiliations

  1. 1.State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil ScienceChinese Academy of SciencesNanjingChina
  2. 2.Department of Renewable ResourcesUniversity of AlbertaEdmontonCanada
  3. 3.School of Geography ScienceNanjing Normal UniversityNanjingChina

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