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Measuring canopy size and nitrogen content in oilseed rape for variable plant growth regulator and nitrogen fertiliser application

Published online by Cambridge University Press:  01 June 2017

S. L. Kendall ,
K. Storer  and
P. M. Berry
S. L. Kendall*
Affiliation:
RSK ADAS Ltd, Gleadthorpe, Meden Vale, Mansfield, Nottinghamshire, NG20 9PDUK
K. Storer
Affiliation:
RSK ADAS Ltd, High Mowthorpe, Duggleby, Malton, North Yorkshire, YO17 8BPUK
P. M. Berry
Affiliation:
RSK ADAS Ltd, High Mowthorpe, Duggleby, Malton, North Yorkshire, YO17 8BPUK
*
†E-mail: sarah.kendall@adas.co.uk
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Abstract

Optimising oilseed rape canopy size through correct management is crucial for maximising yield. Plant growth regulators (PGRs) and nitrogen (N) fertiliser are generally applied at a flat rate, however variable applications may be useful for the optimisation of canopy size. The aim of this paper was to understand the potential for spectral reflectance indices to predict green area index (GAI) and crop N content in winter oilseed rape, with specific focus on the Fritzmeier Isaria Crop Sensor. Three large oilseed rape chessboard experiments were set up in 2015 and 2016 in the UK. The results show good correlations between the Isaria indices and both GAI and crop N content, suggesting that the Isaria may be a useful tool for variably applying PGRs and N fertiliser to oilseed rape.

Keywords

Spectral ReflectanceVariable rate applicationGreen Area IndexIsaria sensor
Type
Precision Nitrogen
Information
Advances in Animal Biosciences , Volume 8 , Special Issue 2: Papers presented at the 11th European Conference on Precision Agriculture (ECPA 2017), John McIntyre Centre, Edinburgh, UK, July 16–20 2017 , July 2017 , pp. 299 - 302
Copyright
© The Animal Consortium 2017 

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