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Type: Journal article
Title: Phosphorus and nitrogen fertiliser use efficiency of wheat seedlings grown in soils from contrasting tillage systems
Author: Armstrong, R.
Dunsford, K.
McLaughlin, M.
McBeath, T.
Mason, S.
Dunbabin, V.
Citation: Plant and Soil, 2015; 396(1):297-309
Publisher: Springer
Issue Date: 2015
ISSN: 0032-079X
Statement of
R.D. Armstrong, K. Dunsford, M.J. McLaughlin, T. McBeath, S. Mason, V.M. Dunbabin
Abstract: Aims: This paper assessed the effect that the vertical stratification of nutrients in conservation cropping systems of Australia has on phosphorus (P) and nitrogen (N) fertiliser use efficiency. Methods: Intact soil cores from two long-term tillage experiments, located on a Vertosol and on a Calcarosol were used to assess if tillage system (zero tillage - ZT vs conventional tillage - CT) and soil water influence fertiliser use efficiency (using 33P and 15N) of wheat under controlled growth conditions. Results: Adding P increased shoot growth and P uptake on the Calcarosol, provided the surface remained moist and N was applied. The percentage of plant P derived from fertiliser (Pdff) was greater on the Calcarosol regardless of tillage practice. Pdff increased when the soil remained wet or when N was added. The percentage of N derived from fertiliser (%Ndff) was not affected by tillage practice on the Vertosol but when the soil surface was allowed to dry, it was significantly greater under ZT than CT on the Calcarosol. Adding P increased N fertiliser recovery but tillage practice had no effect. Conclusion: The effect of tillage practice on P and N fertiliser use efficiency depends on soil and topsoil water status.
Keywords: Wheat; tillage; nutrient use efficiency; ¹⁵N; ³³P
Rights: © Springer International Publishing Switzerland 2015
RMID: 0030041273
DOI: 10.1007/s11104-015-2586-2
Appears in Collections:Agriculture, Food and Wine publications

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