NDLI: 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

Content Provider	Springer Nature Link
Author	Millett, J. Edmondson, S.
Copyright Year	2015
Abstract	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.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.Soil N supply rate was higher in ungrazed plots. There was no difference in green leaf N$_{MASS}$ or C:N ratio between treatments, but N dynamics differed. Adding sheep to existing rabbit grazing reduced S. repens N resorption efficiency (R$_{EFF}$) from 67 to 37 %; excluding rabbits had no impact. Litter N$_{MASS}$ was lower and C:N ratio higher in ungrazed plots.Grazing can impact significantly on leaf N resorption, but this impact depends on the grazing regime.
Starting Page	411
Ending Page	420
Page Count	10
File Format	PDF
ISSN	0032079X
Journal	Plant and Soil
Volume Number	396
Issue Number	1-2
e-ISSN	15735036
Language	English
Publisher	Springer International Publishing
Publisher Date	2015-08-18
Publisher Place	Cham
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Herbivory Grazing Mammals Wetland Nitrogen Biogeochemical cycling Plant Sciences Soil Science & Conservation Plant Physiology Ecology
Content Type	Text
Resource Type	Article
Subject	Soil Science Plant Science

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