Winter oilseed-rape yield estimates from hyperspectral radiometer measurements
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Date
2011
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Wydział Nauk Geograficznych i Geologicznych Uniwersytetu im. Adama Mickiewicza
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Abstract
Spectral reflectance data can be used for estimation of plant biophysical parameters such as seed yield,
related to the use of solar energy. A field experiment was conducted to investigate relationships between canopy
reflectance and seed yield of winter oilseed rape sown on four different dates. Ground hyperspectral reflectance
measurements were made using a hand-held radiometer and multispectral images were taken with a
VIS-NIR camera. The different sowing dates generated a wide range of difference in crop spectral response and
seed yields. The strongest relationships (R2=0.87) between the yield and spectral data recorded by both sensors
occurred at early flowering stages. Later, the presence of flowers caused a decline in the relationship between
yield and spectral data especially in the visible (VIS) range. In the full flowering stage the strongest correlation
(R2=0.72) with the yield showed vegetation indices of the near-infrared (NIR) bands.
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Keywords
Remote Sensing, ground hyperspectral measurements, winter oilseed rape, yield
Citation
Quaestiones Geographicae vol. 30 (1), 2011. pp. 77-84
ISBN
978-83-62662-62-3