The role of field-scale management on soil and surface runoff C/N/P stoichiometry

Smith, Douglas R.; Jarvie, Helen P. ORCID: https://orcid.org/0000-0002-4984-1607; Harmel, R. Daren; Haney, Rick L.. 2019 The role of field-scale management on soil and surface runoff C/N/P stoichiometry. Journal of Environmental Quality, 48 (5). 1543-1548. https://doi.org/10.2134/jeq2018.09.0338

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Abstract/Summary

Agricultural runoff is an important contributor to water quality impairment. This study was conducted to evaluate the potential role of field-scale management on carbon (C), nitrogen (N), and phosphorus (P) stoichiometry in soils and runoff from agricultural fields. Cultivated and pasture fields at the Riesel watersheds in central Texas were used for this analysis, and nutrients were transformed to evaluate relative to the Redfield ratio (106 C/16 N/1 P). Using the Redfield ratio, all soil samples were P depleted relative to C and N. The majority of stormflow and baseflow runoff samples contained 9 to 19% Redfield N relative to C and P. Shifting from inorganic fertilizer application to poultry litter as a fertilizer source resulted in increased absolute C, N, and P concentrations in stormflow and baseflow runoff. Increasing rates of poultry litter application increased the Redfield P relative to Redfield C, whereas Redfield N remained relatively constant at roughly 9 to 11% in stormflow runoff from cultivated fields. This study shows how land use and management can affect C/N/P stoichiometry in stormflow and baseflow runoff.

Item Type:	Publication - Article
Digital Object Identifier (DOI):	https://doi.org/10.2134/jeq2018.09.0338
UKCEH and CEH Sections/Science Areas:	Water Resources (Science Area 2017-)
ISSN:	0047-2425
Additional Information. Not used in RCUK Gateway to Research.:	Open Access paper - full text available via Official URL link.
NORA Subject Terms:	Agriculture and Soil Science
Date made live:	20 Aug 2019 11:02 +0 (UTC)
URI:	https://nora.nerc.ac.uk/id/eprint/524814

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