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Effect of fertilization on composition and spatial distribution of dissolved organic nitrogen in paddy soil microbial systems

Author

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  • H. Zhang

    (School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai, P.R. China
    Key Laboratory of Urban Agriculture, Ministry of Agriculture, P.R.C, Shanghai, P.R. China)

  • Z. Zhao

    (Key Laboratory of Urban Agriculture, Ministry of Agriculture, P.R.C, Shanghai, P.R. China)

  • X. Yi

    (Shanghai Exit and Entry Inspection & Quarantine Bureau, Technical Center For Food, Animal and Plant Inspection and Quarantine, Shanghai, P.R. China)

  • Y. Lu

    (Key Laboratory of Urban Agriculture, Ministry of Agriculture, P.R.C, Shanghai, P.R. China)

  • L. Cao

    (Key Laboratory of Urban Agriculture, Ministry of Agriculture, P.R.C, Shanghai, P.R. China)

Abstract

Dissolved organic nitrogen (DON) has high bioavailability and is an important source of soil nutrients. In order to determine the concentrations and the composition of DON in different depths (0-30 cm), and provide a theoretical basis for further deep research into the paddy soil nitrogen supply, experiments based on the lysimeter method were carried out to investigate the effect of fertilization on composition and spatial distribution of DON in paddy soil. Paddy soil was treated under chemical fertilization treatment (CT) and mixed fertilization treatment (MT). With methods of PCR-DGGE and HPLC-MS, the results of the experiments suggested that the samples in 10-20 cm and 20-30 cm under MT had significantly higher bacterial diversity than those under CT except in 0-10 cm. DON had a high percentage (63.1-79.9%) in Ntot of soil solution. The results of the correlation analysis revealed that DON had a significant positive correlation with organic matter content, Shannon-Wiener diversity index (H') and a significant negative correlation with pH. The possible results of HPLC-MS identification of DON from paddy soil solution were that (a) 3-(4-thiazolyl)-l-alanine; (b) 2-phenylbenzimidazole-5-sulfonic acid; (c) 4-(2, 4-difluorophenyl)-3-nitrobenzene carbaldehyde; (d) fendizoic acid.

Suggested Citation

  • H. Zhang & Z. Zhao & X. Yi & Y. Lu & L. Cao, 2012. "Effect of fertilization on composition and spatial distribution of dissolved organic nitrogen in paddy soil microbial systems," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 58(3), pages 128-134.
    • Handle: RePEc:caa:jnlpse:v:58:y:2012:i:3:id:533-2011-pse
    DOI: 10.17221/533/2011-PSE
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    References listed on IDEAS

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    1. Steven S. Perakis & Lars O. Hedin, 2002. "addendum: Nitrogen loss from unpolluted South American forests mainly via dissolved organic compounds," Nature, Nature, vol. 418(6898), pages 665-665, August.
    2. Steven S. Perakis & Lars O. Hedin, 2002. "Nitrogen loss from unpolluted South American forests mainly via dissolved organic compounds," Nature, Nature, vol. 415(6870), pages 416-419, January.
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