Long-term influence of manure and mineral nitrogen applications on plant and soil 15N and 13C values from the Broadbalk Wheat Experiment

A - Papers appearing in refereed journals

Senbayram, M., Dixon, E. R., Goulding, K. W. T. and Bol, R. 2008. Long-term influence of manure and mineral nitrogen applications on plant and soil 15N and 13C values from the Broadbalk Wheat Experiment. Rapid Communications In Mass Spectrometry. 22 (11), pp. 1735-1740.

AuthorsSenbayram, M., Dixon, E. R., Goulding, K. W. T. and Bol, R.
Abstract

The Broadbalk Wheat Experiment at Rothamsted Research in the UK provides a unique opportunity to investigate the long‐term impacts of environmental change and agronomic practices on plants and soils. We examined the influence of manure and mineral fertiliser applications on temporal trends in the stable N (15N) and C (13C) isotopes of wheat collected during 1968–1979 and 1996–2005, and of soil collected in 1966 and 2000. The soil δ15N values in 1966 and 2000 were higher in manure than the mineral N supplied soil; the latter had similar or higher δ15N values than non‐fertilised soil. The straw δ15N values significantly decreased in all N treatments during 1968 to 1979, but not for 1996–2005. The straw δ15N values decreased under the highest mineral N supply (192 kg N ha−1 year−1) by 3‰ from 1968 to 1979. Mineral N supply significantly increased to straw δ13C values in dry years, but not in wet years. Significant correlations existed between wheat straw δ13C values with cumulative rainfall (March to June). The cultivar Hereward (grown 1996–2005) was less affected by changes in environmental conditions (i.e. water stress and fertiliser regime) than Cappelle Desprez (1968–1979). We conclude that, in addition to fertiliser type and application rates, water stress and, importantly, plant variety influenced plant δ13C and δ15N values. Hence, water stress and differential variety response should be considered in plant studies using plant δ13C and δ15N trends to delineate past or recent environmental or agronomic changes.

KeywordsLong-term experiments
Year of Publication2008
JournalRapid Communications In Mass Spectrometry
Journal citation22 (11), pp. 1735-1740
Digital Object Identifier (DOI)doi:10.1002/rcm.3548
Open accessPublished as bronze (free) open access
FunderBiotechnology and Biological Sciences Research Council
Funder project or codeSoil & Water Interactions (SWI)
SEF
North Wyke Research (NWR)
Industrial Studentship:The role of gibberellin signalling in wheat grain development
Project: 3015
Linking function to process: developing methods to explore the link between microbial function and biogeochemical cycling in soils
The 'Classical' experiments: Broadbalk and Park Grass [2001-2012]
Publisher's version
Copyright license
Publisher copyright
Output statusPublished
Publication dates
Online25 Apr 2008
Publication process dates
Accepted21 Mar 2008
PublisherWiley
ISSN0951-4198

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