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Remote Sensing
Volume 14
Issue 6
10.3390/rs14061435
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Article

Aerial Imagery Can Detect Nitrogen Fertilizer Effects on Biomass and Stand Health of Miscanthus × giganteus

by
Nictor Namoi
1,2,3,4,
Chunhwa Jang
1,2,3,4,*,
Zachary Robins
1,
Cheng-Hsien Lin
1,5,
Soo-Hyun Lim
1,6,
Thomas Voigt
1 and
DoKyoung Lee
1,2,3,4
1
Department of Crop Sciences, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
2
Agroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
3
Center for Advanced Bioenergy and Bioproducts Innovation, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
4
Carl R. Woese Institute for Genomic Biology, University of Illinois at Urbana-Champaign, Urbana, IL 61801, USA
5
Department of Soil and Environmental Sciences, National Chung Hsing University, Taichung 40227, Taiwan
6
Department of Agricultural Science, Korea National Open University, Seoul 03087, Korea
*
Author to whom correspondence should be addressed.
Remote Sens. 2022, 14(6), 1435; https://doi.org/10.3390/rs14061435
Submission received: 8 February 2022 / Revised: 9 March 2022 / Accepted: 14 March 2022 / Published: 16 March 2022
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Abstract

Miscanthus × giganteus (Miscanthus) is a warm-season perennial grass grown for bioenergy feedstock production. Nitrogen (N) fertilizer management is crucial for the sustainability of Miscanthus production. In our two-year study (2018 and 2019), we investigated the role of vegetation indices (VIs) in evaluating N fertilization (0 N, 56 N, 112 N, and 168 N kg ha−1) impacts on Miscanthus biomass yield and stand health. The flight campaigns were conducted early, middle, and late during the summer growing season. Among the VIs, mid-summer growing season NDRE provided the best prediction of fresh biomass (R2 = 0.87 and 0.97) and dry biomass (R2 = 0.89 and 0.97) in 2018 and 2019, respectively. The VIs generally showed that it was possible to distinguish between 0 N and 168 N treatments, but neither 0 N and 56 N kg ha−1 nor 112 N and 168 N kg ha−1 could be separated. The results from this study highlight the importance of moderate application of N (112 kg N ha−1) in improving and maintaining the stand health and biomass yield of Miscanthus over time and suggest that mid-summer growing season VIs, NDRE in particular, can be useful for assessment of Miscanthus stand health and biomass yield.
Keywords: biomass; crop stand health condition; Miscanthus × giganteus; UAV imagery; vegetation Index (VI) biomass; crop stand health condition; Miscanthus × giganteus; UAV imagery; vegetation Index (VI)

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MDPI and ACS Style

Namoi, N.; Jang, C.; Robins, Z.; Lin, C.-H.; Lim, S.-H.; Voigt, T.; Lee, D. Aerial Imagery Can Detect Nitrogen Fertilizer Effects on Biomass and Stand Health of Miscanthus × giganteus. Remote Sens. 2022, 14, 1435. https://doi.org/10.3390/rs14061435

AMA Style

Namoi N, Jang C, Robins Z, Lin C-H, Lim S-H, Voigt T, Lee D. Aerial Imagery Can Detect Nitrogen Fertilizer Effects on Biomass and Stand Health of Miscanthus × giganteus. Remote Sensing. 2022; 14(6):1435. https://doi.org/10.3390/rs14061435

Chicago/Turabian Style

Namoi, Nictor, Chunhwa Jang, Zachary Robins, Cheng-Hsien Lin, Soo-Hyun Lim, Thomas Voigt, and DoKyoung Lee. 2022. "Aerial Imagery Can Detect Nitrogen Fertilizer Effects on Biomass and Stand Health of Miscanthus × giganteus" Remote Sensing 14, no. 6: 1435. https://doi.org/10.3390/rs14061435

APA Style

Namoi, N., Jang, C., Robins, Z., Lin, C.-H., Lim, S.-H., Voigt, T., & Lee, D. (2022). Aerial Imagery Can Detect Nitrogen Fertilizer Effects on Biomass and Stand Health of Miscanthus × giganteus. Remote Sensing, 14(6), 1435. https://doi.org/10.3390/rs14061435

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