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- Title
Impact of sulphur fertilisation on crop response to selenium fertilisation.
- Authors
Stroud, J. L.; Li, H. F.; Lopez-Bellido, F. J.; Broadley, M. R.; Foot, I.; Fairweather-Tait, S. J.; Hart, D. J.; Hurst, R.; Knott, P.; Mowat, H.; Norman, K.; Scott, P.; Tucker, M.; White, P. J.; McGrath, S. P.; Zhao, F. J.
- Abstract
UK wheat ( Triticum aestivum L.) has a low selenium (Se) concentration and agronomic biofortification with Se is a proposed solution. A possible limitation is that UK wheat is routinely fertilised with sulphur (S), which may affect uptake of Se by the crop. The response of wheat to Se and S fertilisation and residual effects of Se were determined in field trials over 2 consecutive years. Selenium fertilisation at 20 g ha−1 as sodium selenate increased grain Se by four to seven fold, up to 374 µg Se kg−1. Sulphur fertilisation produced contrasting effects in 2 years; in year 1 when the crop was not deficient in S, grain Se concentration was significantly enhanced by S, whereas in year 2 when crop yield responded significantly to S fertilisation, grain Se concentration was decreased significantly in the S-fertilised plots. An incubation experiment showed that addition of sulphate enhanced the recovery of selenate added to soils, probably through a suppression of selenate transformation to other unavailable forms in soils. Our results demonstrate complex interactions between S and Se involving both soil and plant physiological processes; S can enhance Se availability in soil but inhibit selenate uptake by plants. Furthermore, no residual effect of Se fertiliser applied in year 1 was found on the following crop.
- Subjects
UNITED Kingdom; AGRICULTURAL productivity; CROP science; SELENIUM; SULFUR; WHEAT; FERTILIZERS; GRAINING; AGRICULTURAL industries; FORTIFICATION
- Publication
Plant & Soil, 2010, Vol 332, Issue 1/2, p31
- ISSN
0032-079X
- Publication type
Article
- DOI
10.1007/s11104-009-0230-8