Relationships between (a) fractional Intercepted PAR (fIPAR), and (b) aboveground biomass (Biomass) and (c) grain yield at harvest with the Normalized Difference Vegetation Index (NDVI) derived either from a spectroradiometer or a conventional camera at final grain filling (n = 12).Postprint (published version

Fernández Murcia, Enric

Gorchs Altarriba, Gil

Serrano Porta, Lydia

PLoS ONE

English

UPCommons. Portal del coneixement obert de la UPC

Use of consumer-grade cameras to assess wheat N status and grain yield

Wheat Grain Yield (GY) and quality are particularly susceptible to nitrogen (N) fertilizer management. However, in rain-fed Mediterranean environments, crop N requirements might be variable due to the effects of water availability on crop growth. Therefore, in-season crop N status assessment is needed in order to apply N fertilizer in a cost-effective way while reducing environmental impacts. Remote sensing techniques might be useful at assessing in-season crop N status. In this study, we evaluated the capacity of vegetation indices formulated using blue (B), green (G), red (R) and near-infrared (NIR) bands obtained with a consumer-grade camera to assess wheat N status. Chlorophyll Content Index (CCI) and fractional intercepted PAR (fIPAR) were measured at three phenological stages and GY and biomass were determined at harvest. Indices formulated using RG bands and the normalized difference vegetation index (NDVI) were significantly correlated with both CCI and fIPAR at the different phenological stage (0.71 P  0.80, P </div

Enric Fernández (6368636)

Gil Gorchs (6368639)

Lydia Serrano (6368642)

FigShare

Wheat (Triticum aestivum L) is a widely grown crop under rain-fed conditions in Mediterranean-type climate regions. Even though drought is the main constraint limiting wheat grain yield (GY) in these Mediterranean-type environments [1], nitrogen (N) fertilization has been recognized as the most cost efficient and practical tool to manage in order to optimize wheat GY [2,3]. Moreover, N availability is not only an important determinant of wheat grain yield [4,5], but adequate N supply at critical stages (i.e., at anthesis) its known to increase the qualitative appreciation of grain as a result of increased grain protein level [6]. Therefore, independently of the occurrence of water deficits, N availability is a key factor for optimizing wheat GY and quality under rain-fed conditions [7,8].NO ACK

Fernández, Enric

Gorchs, Gil

Serrano, Lydia

NEUROSURGERY ENTHUSIASTIC WOMEN SOCIETY

ZENODO

Wheat Grain Yield (GY) and quality are particularly susceptible to nitrogen (N) fertilizer management. However, in rain-fed Mediterranean environments, crop N requirements might be variable due to the effects of water availability on crop growth. Therefore, in-season crop N status assessment is needed in order to apply N fertilizer in a cost-effective way while reducing environmental impacts. Remote sensing techniques might be useful at assessing in-season crop N status. In this study, we evaluated the capacity of vegetation indices formulated using blue (B), green (G), red (R) and near-infrared (NIR) bands obtained with a consumer-grade camera to assess wheat N status. Chlorophyll Content Index (CCI) and fractional intercepted PAR (fIPAR) were measured at three phenological stages and GY and biomass were determined at harvest. Indices formulated using RG bands and the normalized difference vegetation index (NDVI) were significantly correlated with both CCI and fIPAR at the different phenological stage (0.71  0.80, P < 0.01). Finally, RGB indices and NDVI obtained with a consumer-grade camera showed comparable capacity at assessing chlorophyll content and predicting both crop biomass and GY at harvest than those obtained with a spectroradiometer. This study highlights the potential of standard and modified consumer-grade cameras at assessing canopy traits related to crop N status and GY in wheat under Mediterranean conditions

Use of consumer-grade cameras to assess wheat N status and grain yield

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UPCommons. Portal del coneixement obert de la UPC

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NEUROSURGERY ENTHUSIASTIC WOMEN SOCIETY

ZENODO

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