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Humus characteristics after maize residues degradation in soil amended with different copper concentrations

Author

Listed:
  • J.J. Zhang

    (College of Resource and Environmental Science, Jilin Agricultural University, Changchun, P.R. China)

  • L.B. Wang

    (College of Resource and Environmental Science, Jilin Agricultural University, Changchun, P.R. China
    College of Arts and Sciences, Jilin Agricultural Science and Technology University,)

  • C.L. Li

    (College of Resource and Environmental Science, Jilin Agricultural University, Changchun, P.R. China)

Abstract

Crop residues humification is an important process in nutrient cycling in agroecosystems. A preliminary laboratory incubation experiment of 180 days was conducted to evaluate the quantitative and qualitative characteristics of humic fractions formed during the humification process of maize residues in soil amended with different copper (Cu) concentrations. The Cu concentrations tested were 0, 50, 100, 200, 400, 600, 800, and 1000 mg Cu/kg dry soil. Results showed that the carbon content of humic fractions, i.e. humic acid (HA) and fulvic acid (FA), increased with the increase of Cu concentrations; the exception was carbon content of HA that initially decreased at the concentration of 50 mg Cu/kg. The color coefficient (ΔlogK) and activation degree (AD) of HA increased with increasing Cu concentrations while the relative color intensity (RF) decreased. In summary, we found that the carbon accumulation of humic fractions increases while the degrees of humification and aromaticity of HA decrease with increasing Cu concentrations in soil.

Suggested Citation

  • J.J. Zhang & L.B. Wang & C.L. Li, 2010. "Humus characteristics after maize residues degradation in soil amended with different copper concentrations," Plant, Soil and Environment, Czech Academy of Agricultural Sciences, vol. 56(3), pages 120-124.
    • Handle: RePEc:caa:jnlpse:v:56:y:2010:i:3:id:218-2009-pse
    DOI: 10.17221/218/2009-PSE
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    Cited by:

    1. Cuilan LI & Shuqing GAO & Jinjing ZHANG & Lanpo ZHAO & Lichun WANG, 2016. "Moisture effect on soil humus characteristics in a laboratory incubation experiment," Soil and Water Research, Czech Academy of Agricultural Sciences, vol. 11(1), pages 37-43.

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