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Emission of carbon dioxide influenced by nitrogen and water levels from soil incubated straw

Author

Listed:
  • S.A. Abro

    (College of Resources and Environmental Sciences, Northwest A & F University, Yangling, Shaanxi, P.R. China)

  • X.H. Tian

    (College of Resources and Environmental Sciences, Northwest A & F University, Yangling, Shaanxi, P.R. China)

  • D.H. You

    (College of Resources and Environmental Sciences, Northwest A & F University, Yangling, Shaanxi, P.R. China)

  • X.D. Wang

    (College of Resources and Environmental Sciences, Northwest A & F University, Yangling, Shaanxi, P.R. China)

Abstract

An incubation study was carried out to investigate the influence of nitrogen rates to determine optimum C/N ratio under various moisture levels for straw decomposition and sequester carbon (C) in the soil. The aim was to observe straw carbon mineralization through measuring the amount of CO2 evolution. A clay loam topsoil mixed with maize straw was supplied with four nitrogen rates (0.04, 0.08, 0.16, 0.32 g N/kg) using (NH4)2SO4 to adjust C/N ratios at 82, 42, 20, and 10. Soil moisture was maintained at 55%, 70%, 85%, and 100% of field capacity incubated at 25°C for 53 days. The experiment was set up with 16 treatments arranged in complete randomized design. Results showed that mixing of straw with soil increased 50% cumulative CO2-C compared to controls. Averagely, about 44% of added maize straw C was mineralized to CO2-C. Straw addition along with nitrogen and moisture had significant relationships (P < 0.05) to cumulative CO2-C, soil organic C and microbial biomass C. There was a highly significant relationship (R2 = 0.99) between CO2-C emission and incubation time.

Suggested Citation

  • S.A. Abro & X.H. Tian & D.H. You & X.D. Wang, 2011. "Emission of carbon dioxide influenced by nitrogen and water levels from soil incubated straw," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 57(6), pages 295-300.
    • Handle: RePEc:caa:jnlpse:v:57:y:2011:i:6:id:387-2010-pse
    DOI: 10.17221/387/2010-PSE
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    Cited by:

    1. Han Liu & Tingting Ma & Li Wan & Guopeng Zhou & Anfan Zhu & Xiaofen Chen & Jia Liu, 2024. "The Application of Rice Straw with Reduced N Fertilizer Improves the Rice Yield While Decreasing Environmental N Losses in Southern China," Sustainability, MDPI, vol. 16(7), pages 1-14, March.

    More about this item

    Keywords

    CO2-C evolution; moisture; nitrogen; straw decomposition;
    All these keywords.

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