Leaching of nitrogen from calcareous soils in western Iran: a soil leaching column study.

Environmental Monitoring and Assessment
Mahboubeh Zarabi, Mohsen Jalali

Abstract

Nitrogen (N) leaching has become a matter of worldwide concern. The objectives of this study were: (1) to use soil columns to investigate the leaching of nitrate ([Formula: see text]), ammonium ([Formula: see text]), and nitrite ([Formula: see text]) from calcareous soils that had received an average of 200 kg(-1) N ha(-1) year(-1) for the previous 30 years and (2) to determine the relationship between soil properties and [Formula: see text], [Formula: see text], and [Formula: see text] leaching. The soils used in this study ranged in texture from clay to sandy loam. Leaching experiments were conducted under saturation conditions and consisted of the collection of 1,047-2,524 mL of leachate (12 pore volumes (PVs)), which was equivalent to 534-1,286 mm from rainfall or irrigation. Losses of [Formula: see text] ranged from 62 to 437 kg ha(-1), while losses of [Formula: see text] and [Formula: see text] ranged from 2.5 to 19.3 kg ha(-1) and 0.1 to 10.6 kg ha(-1), respectively. Leaching rates differed between soil samples. The initial and secondary rate of [Formula: see text] leaching was determined using an exponential model, and it ranged from 2.8 to 14.7 mg kg(-1) PV(-1) and 0.11 to 0.32 mg kg(-1) PV(-1). Greater leaching rates ...Continue Reading

References

Jun 25, 2002·Ambio·Peter M VitousekSteven Allison
Aug 15, 2002·Journal of Environmental Quality·M A Al-WabelK A Barbarick
Apr 15, 2008·The Science of the Total Environment·Basem ShomarAlfred Yahya
Jan 1, 1974·Annual Review of Phytopathology·D M Huber, R D Watson

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Citations

Sep 7, 2014·Environmental Monitoring and Assessment·Anna Piotrowska-Długosz, Edward Wilczewski
Feb 6, 2017·Journal of Experimental Botany·Xiaorong FanGuohua Xu

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