Effect of nitrate leaching in oxisol columns on 15N abundance and nitrate breakthrough curves
作者: A. S. BlackS. A. Waring
作者单位: 1Department of Agriculture, University of Queensland, St. Lucia, Qld., Australia,Department of Soil Science, Lincoln College, Canterbury, New Zealand
2Department of Agriculture, University of Queensland, St. Lucia, Qld., Australia
刊名: Communications in Soil Science and Plant Analysis, 1979, Vol.10 (3), pp.521-529
来源数据库: Taylor & Francis Journal
DOI: 10.1080/00103627909366915
关键词: Isotope fractionationnitrate adsorption
原始语种摘要: Nitrate (20 mg N03- N l-1) was leached through 180 cm columns of oxisol subsoil until the leachate attained the initial nitrate concentration. Leaching was continued with water until no nitrate was detectable in the leachate.The Δ15N for the first aliquot of leachate containing nitrate was 2.2 units lower than that of the added solution indicating that 15Nwas preferentially adsorbed to 14N. The breakthrough curve for nitrate indicated that nitrate adsorption decreased after six pore volumes. The implications for modelling nitrate leaching are discussed.
全文获取路径: Taylor & Francis  (合作)