Remote Sensing | |
Modeling Mid-Season Rice Nitrogen Uptake Using Multispectral Satellite Data | |
James Brinkhoff1  AndrewJ. Robson1  RemyL. Dehaan2  TinaS. Dunn3  BrianW. Dunn3  | |
[1] Applied Agricultural Remote Sensing Centre, University of New England, Armidale, NSW 2351, Australia;EH Graham Centre for Agricultural Innovation (NSW Department of Primary Industries and Charles Sturt University), Locked Bag 588, Wagga, NSW 2678, Australia;NSW Department of Primary Industries, 2198 Irrigation Way, Yanco, NSW 2703, Australia; | |
关键词: rice; nitrogen management; remote sensing; multispectral imagery; reflectance index; multiple variable linear regression; Lasso model; | |
DOI : 10.3390/rs11151837 | |
来源: DOAJ |
【 摘 要 】
Mid-season nitrogen (N) application in rice crops can maximize yield and profitability. This requires accurate and efficient methods of determining rice N uptake in order to prescribe optimal N amounts for topdressing. This study aims to determine the accuracy of using remotely sensed multispectral data from satellites to predict N uptake of rice at the panicle initiation (PI) growth stage, with a view to providing optimum variable-rate N topdressing prescriptions without needing physical sampling. Field experiments over 4 years, 4−6 N rates, 4 varieties and 2 sites were conducted, with at least 3 replicates of each plot. One WorldView satellite image for each year was acquired, close to the date of PI. Numerous single- and multi-variable models were investigated. Among single-variable models, the square of the NDRE vegetation index was shown to be a good predictor of N uptake (R
【 授权许可】
Unknown