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Please use this identifier to cite or link to this item: https://dspace.lboro.ac.uk/2134/19023

Title: The impact of 36 years of grazing management on soil nitrogen (N) supply rate and Salix repens N status and internal cycling in dune slacks
Authors: Millett, Jonathan
Edmondson, Sally
Keywords: Herbivory
Biogeochemical cycling
Issue Date: 2015
Publisher: © Springer International Publishing Switzerland
Citation: MILLETT, J. and EDMONDSON, S., 2015. The impact of 36 years of grazing management on soil nitrogen (N) supply rate and Salix repens N status and internal cycling in dune slacks. Plant and Soil, 396(1), pp. 411–420.
Abstract: Aims: To determine the impact of long-term rabbit and sheep grazing on Salix repens N status (green and abscised leaf N content and C:N ratio), internal N dynamics and soil N supply rate in dune slacks. Methods: Herbivore exclosures were erected in dune slacks at Ainsdale Sand Dunes NNR, creating three grazing treatments: rabbit grazing; rabbits excluded for 36 years; rabbit grazing followed by sheep and rabbit grazing for 18 years. Soil N supply rate was analysed using ion exchange membranes; leaf N dynamics of S. repens were measured over one summer. Results: Soil N supply rate was higher in ungrazed plots. There was no difference in green leaf N<inf>MASS</inf> or C:N ratio between treatments, but N dynamics differed. Adding sheep to existing rabbit grazing reduced S. repens N resorption efficiency (R<inf>EFF</inf>) from 67 to 37 %; excluding rabbits had no impact. Litter N<inf>MASS</inf> was lower and C:N ratio higher in ungrazed plots. Conclusions: Grazing can impact significantly on leaf N resorption, but this impact depends on the grazing regime.
Description: The final publication is available at Springer via http://dx.doi.org/10.1007/s11104-015-2628-9
Sponsor: This study was funded by the Botanical Society of the British Isles.
Version: Accepted for publication
DOI: 10.1007/s11104-015-2628-9
URI: https://dspace.lboro.ac.uk/2134/19023
Publisher Link: http://dx.doi.org/10.1007/s11104-015-2628-9
ISSN: 0032-079X
Appears in Collections:Published Articles (Geography and Environment)

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