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Immingham, United Kingdom

Stroud J.L.,Rothamsted Research | Broadley M.R.,University of Nottingham | Foot I.,Limagrain UK Ltd | Fairweather-Tait S.J.,University of East Anglia | And 10 more authors.
Plant and Soil | Year: 2010

UK crops have a low selenium (Se) status, therefore Se fertilisation of wheat (Triticum aestivum L.) at 10 field sites was investigated and the effect on the content and speciation of Se in soils determined. Soil characterisation was carried out at each field site to determine the soil factors that may influence wheat grain Se concentrations in unfertilised plots. Soil samples were taken after harvest from each treatment to determine the fate and speciation of selenate fertiliser applied to soil. Wheat grain Se concentrations could be predicted from soil Se concentration and soil extractable sulphur (S) using the following regression model: Grain Se=a+b(total soil Se)+c(extractable soil Se) - d(extractable soil S), with 86 % of the variance being accounted for, suggesting that these properties control Se concentrations in grain from unfertilised plots. Extractable soil Se concentrations were low (2.4 - 12.4 μg kg-1) and predominantly consisted of selenite (up to 70 % of extractable Se) and soluble organic forms, whereas selenate was below the detection limit. Little of the added Se, in either liquid or granular form was left in the soil after crop harvest. Se fertilisation up to 20 g ha-1 did not lead to a significant Se accumulation in the soil, suggesting losses of Se unutilised by the crop. © 2009 Springer Science+Business Media B.V.


Stroud J.L.,Rothamsted Research | Li H.F.,Rothamsted Research | Li H.F.,China Agricultural University | Lopez-Bellido F.J.,Rothamsted Research | And 13 more authors.
Plant and Soil | Year: 2010

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. © 2009 Springer Science+Business Media B.V.


Trademark
YARA UK Ltd and Phosyn | Date: 2008-02-12

CHEMICAL PRODUCTS FOR USE IN MANUFACTURING PREPARATIONS FOR FORTIFYING PLANTS, TREES, AND CROPS.


Trademark
YARA UK Ltd, Pace International Llc, Pace International and Thompson Hayward Chemical Company | Date: 1975-07-22

ADHESIVES-NAMELY, THERMOSETTING RESINS FOR INDUSTRIAL USE; HARDENERS FOR THERMOSETTING RESINS; PESTICIDE SPRAY ADJUVANTS; PLANT NUTRIENTS AND PLANT FOODS; SPREADERS AND STICKERS FOR FOLIAR SPRAYS. [ FUNGICIDES AND INSECTICIDES ].


Trademark
YARA UK Ltd, Phosyn, Uniroyal Chemical Company and Uniroyal Inc. | Date: 1985-01-15

Foliar Spray for Use on Trees, Vines, Field and Vegetable Crops.

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