A proposed use of ion exchange resins to measure nitrogen mineralization and nitrification in intact soil cores
作者:
J. Fco. DiStefano,
H.L. Gholz,
期刊:
Communications in Soil Science and Plant Analysis
(Taylor Available online 1986)
卷期:
Volume 17,
issue 9
页码: 989-998
ISSN:0010-3624
年代: 1986
DOI:10.1080/00103628609367767
出版商: Taylor & Francis Group
关键词: Nitrogen;mineralization;nitrification;ion exchange resins
数据来源: Taylor
摘要:
A procedure is proposed for measuring nitrogen mineralization and nitrification in intact soil cores. The method relies on ion exchange resins to trap ammonium and nitrate entering and leaving cores of soil otherwise open at the top and bottom. Changes in soil concentrations plus an accounting of ions trapped by the lower resin after field incubations, indicate rates of nitrogen reactions. Using this technique, we estimated net ammonification rates from 0–36 mg N/kg/mo and nitrification rates from 0–16 mg N/kg/mo for the surface of a sandy, low nutrient soil under pine cultivation in north Florida; higher rates occurred after urea fertilization. The procedure has potential advantages over others, but must be more fully evaluated under a variety of conditions.
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