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Journal of Plant Nutrition Volume 40, 2017 - Issue 13
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Original Articles

Remote sensing of nitrogen status in wheat by a radiometric response of its canopy

C. WeberFacultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, FCAyF-UNLP, La Plata, Argentina;Comisión de Investigaciones Científicas de la Provincia de Buenos Aires CIC-PBA, La Plata, Argentina;Centro de Investigaciones Ópticas, CIOp CONICET-CIC, La Plata, Argentina
,
F. NavarreteFacultad de Ciencias Agrarias y Forestales, Universidad Nacional de La Plata, FCAyF-UNLP, La Plata, ArgentinaCorrespondence[email protected]
,
L. PeronaComisión de Investigaciones Científicas de la Provincia de Buenos Aires CIC-PBA, La Plata, Argentina
&
H. A. AcciaresiComisión de Investigaciones Científicas de la Provincia de Buenos Aires CIC-PBA, La Plata, Argentina;Instituto Nacional de Tecnología Agropecuaria (INTA, Pergamino), Pergamino, Argentina
Pages 1877-1886 | Received 15 Oct 2015, Accepted 26 Apr 2016, Published online: 22 Aug 2017
 
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ABSTRACT

Over the last 20 years, a rapid analysis of plant in general and pigments in particular to detect variations in the content of nitrogen (N) has appeared significant, always based on the premise that the photosynthetic capacity of the plants is related to the content of N. This work has tried to determine if there is a different behavior on chlorophyll meter (SPAD) values taken at different heights from the ground faced with three levels of N fertilization and compared with the behavior of a vegetation index calculated from remote sensing data. The degree of fit between these techniques was determined, thereby obtaining a high correlation between them showing that remote sensing measurements could be reliably used as an adequate indicator of the N-nutritional status in the whole wheat plant, showing a better behavior than chlorophyll meters, a technology that is more complicated and less practical to implement in large areas.

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