Continuous Monitoring of Visible and Near-Infrared Band Reflectance from a Rice Paddy for Determining Nitrogen Uptake Using Digital Cameras

Shibayama, Michio; Sakamoto, Toshihiro; Takada, Eiji; Inoue, Akihiro; Morita, Katsusada; Takahashi, Wataru; Kimura, Akihiko

doi:10.1626/pps.12.293

Cited by 35 publications

(24 citation statements)

References 32 publications

(35 reference statements)

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“…The MBSC is equipped to capture data in two wavelength bands: 645 −655 nm (RED) and 850-860 nm (NIR). These bands have proved useful in trials to estimate paddy rice nitrogen uptake using a digital camera system (Shibayama et al, 2009). RED and NIR or adjacent wavelengths are widely used in remote sensing to derive vegetation indices such as normalized difference vegetation index (NDVI, Rouse et al, 1974).…”

Section: Instrumentsmentioning

confidence: 99%

“…The exposure value employed at a given spectral irradiance was experimentally selected such that image was unsaturated at RF 1.0. The calibration procedure is described in detail by Shibayama et al (2009). The RF value is obtained on a pixel-by-pixel basis using the equation:…”

Section: Conversion Algorithm For Refl Ectance Factormentioning

confidence: 99%

“…Technological developments, such as improved sensitivity and camera calibration with solar illumination, allow the continuous collection of narrow-band spectral refl ectance data. We developed a dual-band digital image collection system (PDC: portable dual-band digital camera, Kimura OyoKogei, Inc., Saitama, Japan) that measures the daily-averaged refl ectance factor (DARF) in the visible red (RED) and near infrared (NIR) bands (Shibayama et al, 2009). The system acquires radiometric data for models of nitrogen uptake and leaf area index in paddy rice (Shibayama et al, 2009;2011).…”

mentioning

confidence: 99%

“…We developed a dual-band digital image collection system (PDC: portable dual-band digital camera, Kimura OyoKogei, Inc., Saitama, Japan) that measures the daily-averaged refl ectance factor (DARF) in the visible red (RED) and near infrared (NIR) bands (Shibayama et al, 2009). The system acquires radiometric data for models of nitrogen uptake and leaf area index in paddy rice (Shibayama et al, 2009;2011). The PDC used a standard camera board with a restricted image size (640 ×480 pixels) and fixed programmable camera sensitivities (exposures).…”

mentioning

confidence: 99%

“…The instrument may enable the automatic, continuous collection of quantitative variables of plant growth such as leaf area, above-ground biomass, plant or weed cover, leaf color and nutrient or stress conditions for several experimental plots in the fi eld of view (Shibayama et al, 2009;2011). Periodic surveys for those parameters are indispensable for most field crop research but are timeand labor-intensive.…”

mentioning

confidence: 99%

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Multi-Band Spectrum Camera (MBSC) for Automatic Fixed-Point Reflectance Image Collection in a Crop Field

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Section: Instrumentsmentioning

confidence: 99%

Section: Conversion Algorithm For Refl Ectance Factormentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

mentioning

confidence: 99%

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Multi-Band Spectrum Camera (MBSC) for Automatic Fixed-Point Reflectance Image Collection in a Crop Field

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Plant Production Science

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Quantifying aluminum toxicity effects on corn phenotype using advanced imaging technologies

Szőke,

Tóth,

Javornik

et al. 2024

Plant Direct

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Soil acidity (pH <5.5) limits agricultural production due to aluminum (Al) toxicity. The primary target of Al toxicity is the plant root. However, symptoms can be observed on the shoots. This study aims to determine the potential use of chlorophyll fluorescence imaging, multispectral imaging, and 3D multispectral scanning technology to quantify the effects of Al toxicity on corn. Corn seedlings were grown for 13 days in nutrient solutions (pH 4.0) with four Al treatments: 50, 100, 200, and 400 μM and a control (0 μM AlCl3 L−1). During the experiment, four measurements were performed: four (MT1), six (MT2), 11 (MT3), and 13 (MT4) days after the application of Al treatments. The most sensitive traits affected by Al toxicity were the reduction of plant growth and increased reflectance in the visible wavelength (affected at MT1). The reflectance of red wavelengths increased more significantly compared to near‐infrared and green wavelengths, leading to a decrease in the normalized difference vegetation index and the Green Leaf Index. The most sensitive chlorophyll fluorescence traits, effective quantum yield of PSII, and photochemical quenching coefficient were affected after prolonged Al exposure (MT3). This study demonstrates the usability of selected phenotypic traits in remote sensing studies to map Al‐toxic soils and in high‐throughput phenotyping studies to screen Al‐tolerant genotypes.

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Smart Farming Technologies for Sustainable Agriculture: From Food to Energy

Güven¹,

Baz²,

Kocaoğlu³

et al. 2023

A Sustainable Green Future

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Continuous Monitoring of Visible and Near-Infrared Band Reflectance from a Rice Paddy for Determining Nitrogen Uptake Using Digital Cameras

Cited by 35 publications

References 32 publications

Multi-Band Spectrum Camera (MBSC) for Automatic Fixed-Point Reflectance Image Collection in a Crop Field

Multi-Band Spectrum Camera (MBSC) for Automatic Fixed-Point Reflectance Image Collection in a Crop Field

Quantifying aluminum toxicity effects on corn phenotype using advanced imaging technologies

Smart Farming Technologies for Sustainable Agriculture: From Food to Energy

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