Paper Info
Title
Aerial Imagery Can Detect Nitrogen Fertilizer Effects on Biomass and Stand Health of Miscanthus x giganteus
Abstract
Miscanthus x 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 (R-2 = 0.87 and 0.97) and dry biomass (R-2 = 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.
Year
DOI
Venue
2022
10.3390/rs14061435
REMOTE SENSING
Keywords
DocType
Volume
biomass, crop stand health condition, Miscanthus x giganteus, UAV imagery, vegetation Index (VI)
Journal
14
Issue
ISSN
Citations 
6
2072-4292
0
PageRank 
References 
Authors
0.34
0
7
Name
Order
Citations
PageRank
Nictor Namoi100.34
Chunhwa Jang200.34
Zachary Robins300.34
Cheng-Hsien Lin400.34
Soo-Hyun Lim500.34
Thomas Voigt600.34
DoKyoung Lee700.34