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Effect of long-term fertilization on soil aggregate-associated dissolved organic nitrogen on sloping cropland of purple soil

Author

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  • K.K. Hua

    (Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, P.R. China
    Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, P.R. China)

  • B. Zhu

    (Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, P.R. China)

  • X.G. Wang

    (Key Laboratory of Mountain Surface Processes and Ecological Regulation, Institute of Mountain Hazards and Environment, Chinese Academy of Sciences, Chengdu, P.R. China)

  • X.S. Guo

    (Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, P.R. China)

  • D.Z. Wang

    (Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, P.R. China)

  • Z.B. Guo

    (Soil and Fertilizer Research Institute, Anhui Academy of Agricultural Sciences, Hefei, P.R. China)

Abstract

To investigate the effect of fertilization practice on dissolved organic nitrogen (DON) in aggregates, the study was conducted and involved four fertilization treatments: no fertilizer; mineral fertilizer (MF); pig manure matched with mineral fertilizer (MFP) and crop straw matched with mineral fertilizer (MFR). The results showed that DON content and storage were the highest in > 5 mm aggregates and were the lowest in < 0.25 mm aggregates. Compared with MF, MFP and MFR significantly increased DON contents in > 5 mm by 404.7% and 184.4%. In comparison with MFR, DON content and storage in > 5 mm aggregates for MFP were significantly enhanced by 77.5% and 75.0%. A significantly positive linear correlation relationship between DON content and microbial biomass carbon content was observed in aggregates (R2 = 0.84; P < 0.01). The results suggest that pig manure matched with mineral fertilizer is a preferred strategy for retaining DON nutrient due to enhanced microbial biomass in aggregates on sloping upland of purple soil.

Suggested Citation

  • K.K. Hua & B. Zhu & X.G. Wang & X.S. Guo & D.Z. Wang & Z.B. Guo, 2014. "Effect of long-term fertilization on soil aggregate-associated dissolved organic nitrogen on sloping cropland of purple soil," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 60(2), pages 51-56.
  • Handle: RePEc:caa:jnlpse:v:60:y:2014:i:2:id:881-2013-pse
    DOI: 10.17221/881/2013-PSE
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    References listed on IDEAS

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    1. Z. Guo & D.Z. Wang, 2013. "Long-term effects of returning wheat straw to croplands on soil compaction and nutrient availability under conventional tillage," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 59(6), pages 280-286.
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