Offered Papers Theme C: Delivering the Benefits from Grassland
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Publication Date
2005
Location
Dublin Ireland
Description
In organic farming systems, biological nitrogen (N) fixation is crucial for short-term productivity and long-term sustainability. However, the estimation of biological N fixation is fraught with difficulties, and many equations attempt to estimate the process. As part of an organic research programme, biological N fixation was measured by the 15N dilution technique in the ley phases of 2 experimental organic ley-arable rotations at 2 sites, between 1997 and 2000. Hence, N fixation has been determined on N partitioned to above-ground biomass. The measured values have been compared with N fixation estimates calculated from the equations proposed by Korsaeth & Eltun (2000) and Hogh-Jensen et al. (2004).
Citation
Topp, C. F. E.; Watson, C. A.; Rees, R. M.; and Sanders, I., "The Prediction of Biological Nitrogen Fixation" (2005). IGC Proceedings (1985-2023). 72.
(URL: https://uknowledge.uky.edu/igc/20/themeC/72)
Included in
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The Prediction of Biological Nitrogen Fixation
Dublin Ireland
In organic farming systems, biological nitrogen (N) fixation is crucial for short-term productivity and long-term sustainability. However, the estimation of biological N fixation is fraught with difficulties, and many equations attempt to estimate the process. As part of an organic research programme, biological N fixation was measured by the 15N dilution technique in the ley phases of 2 experimental organic ley-arable rotations at 2 sites, between 1997 and 2000. Hence, N fixation has been determined on N partitioned to above-ground biomass. The measured values have been compared with N fixation estimates calculated from the equations proposed by Korsaeth & Eltun (2000) and Hogh-Jensen et al. (2004).
