Abstract
A laboratory incubation experiment was conducted to study the effect of NH4+fixation/defixation on the added N interaction (ANI) in three Illinois Mollisols fertilized with 100 or 200 mg N kg-1 soil. A positive ANI was observed in all three soils, which was greater at the higher rate of applied N. However, very little exchange was observed between applied 15NH4+and the native clay-fixed NH4+, and the ANI observed were attributed largely to microbial immobilization-mineralization. The results suggested that variations in the NH4+fixation capacity of soils will not have a significant bearing on the interpretation of data obtained from studies of the ANI.
Original language | English (US) |
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Pages (from-to) | 99-102 |
Number of pages | 4 |
Journal | Biology and Fertility of Soils |
Volume | 18 |
Issue number | 2 |
DOIs | |
State | Published - Jul 1994 |
Keywords
- Added N interaction
- Ammonium fixation
- N immobilization
- N mineralization
- Priming effect
ASJC Scopus subject areas
- Microbiology
- Agronomy and Crop Science
- Soil Science