Elsevier

Pedosphere

Volume 30, Issue 2, April 2020, Pages 263-271
Pedosphere

Effect of controlled-release urea on heavy metal mobility in a multimetal-contaminated soil

https://doi.org/10.1016/S1002-0160(17)60467-3Get rights and content

Abstract

Controlled-release N fertilizers can affect the availability of heavy metals in the contaminated paddy soil. A soil incubation experiment was conducted to investigate the effects of prilled urea (PU), S-coated urea (SCU), and polymer-coated urea (PCU) on the solubility and availability of heavy metals Cd, Pb, Cu, and Zn in a multimetal-contaminated soil. The results showed that the application of different coated urea significantly affected the solubility and availability of heavy metals. At 5 d of incubation, the application of PU, SCU, and PCU had significantly decreased the concentrations of water-soluble and available Cd, Pb, Cu, and Zn, when compared with the control. At 60 d of incubation, the depletory effects of PU on water-soluble and available heavy metals had reduced, and the initial decrease in the concentrations of water-soluble Cd, Pb, Cu, and Zn caused by SCU had changed to an increase. The concentrations of water-soluble Pb, Cu, and Zn in the SCU-treated soil were higher than those in the control. Application with PCU led to a higher water-soluble Cu than that in the control, while the available Cd, Pb, and Zn were lower than those in the control. The effect of different coated urea was much stronger on the water solubility of the heavy metals than on their availability. The effects of controlled-release urea on the transformation of heavy metals resulted in changes in the concentrations of NH+4, water-soluble SO2−4, and soil pH. The results further suggested that PCU could be used in dry farming operations in multimetal-contaminated acid soils.

References (52)

  • E Amoakwah et al.

    Comparison of the solubilizing efficiencies of some pH lowering (sulphur and (NH4)2SO4) amendments on Cd and Zn mobility in soils

    Bull Environ Contam Toxicol

    (2014)
  • L H Bao

    Degradation of polymer coating residual of controlled release fertilizer and its effects on soil biological properties (in Chinese)

    (2010)
  • T B Chen et al.

    Cadmium adsorption in soil influenced by dissolved organic matter derived from rice straw and sediment

    Chin J Appl Ecol (in Chinese)

    (2002)
  • D D Cheng et al.

    Effects of controlled-release fertilizer residual coating on properties of soil and growth of winter wheat and summer corn

    J Soil Water Conserv (in Chinese)

    (2011)
  • F Glover et al.

    Acidification and buffering mechanisms in acid sulfate soil wetlands of the Murray-Darling Basin, Australia

    Environ Sci Technol

    (2011)
  • L T Jiaka et al.

    Effect of different N, P and K fertilizers on soil pH and available Cd under waterlogged conditions

    Environ Sci (in Chinese)

    (2009)
  • A Kayser et al.

    Enhancement of phytoextraction of Zn, Cd, and Cu from calcareous soil: The use of NTA and sulfur amendments

    Environ Sci Technol

    (2000)
  • M Kochba et al.

    Studies on slow release fertilizers: 1. Effects of temperature, soil moisture, and water vapor pressure

    Soil Sci

    (1990)
  • H H Li et al.

    Effect of fertilization on nitrate and nutrient forms of lettuce in acid garden soils

    Plant Nutr Fert Sci (in Chinese)

    (2004)
  • L M Li et al.

    Nitrification of major soil types in Taihu Lake region and their influencing factors

    Soils (in Chinese)

    (1987)
  • S T Li et al.

    Review on sulphur transformation and availability in soil

    Chin J Soil Sci (in Chinese)

    (2001)
  • T Q Li et al.

    Soil dissolved organic matter and its effect on chemical and biological behaviors of soil heavy metals

    Chin J Appl Ecol (in Chinese)

    (2004)
  • Y T Li et al.

    Effects of heavy metals on microbial biomass and activity in subtropical paddy soil contaminated by acid mine drainage

    Acta Ecol Sin (in Chinese)

    (2004)
  • P J Liang et al.

    Effect of different controlled-release nitrogen fertilizers on availability of heavy metals in contaminated red soils under waterlogged conditions

    Acta Ecol Sin (in Chinese)

    (2013)
  • C X Lin et al.

    Forms of acidity in acid sulfate soils and their determinations

    Ecol Environ (in Chinese)

    (2003)
  • Z Q Liu et al.

    Transformation characteristics of sulfur forms in acid sulfate soils under different soil water conditions

    Chin J Appl Ecol (in Chinese)

    (2004)
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