Estimation of winter wheat canopy nitrogen density at different growth stages based on Multi-LUT approach

Zhenhai Li; Na Li; Zhenhong Li; Jianwen Wang; Chang Liu

doi:10.1117/12.2278719

2 November 2017 Estimation of winter wheat canopy nitrogen density at different growth stages based on Multi-LUT approach

Zhenhai Li, Na Li, Zhenhong Li, Jianwen Wang, Chang Liu

Author Affiliations +

Proceedings Volume 10421, Remote Sensing for Agriculture, Ecosystems, and Hydrology XIX; 1042119 (2017) https://doi.org/10.1117/12.2278719
Event: SPIE Remote Sensing, 2017, Warsaw, Poland

Abstract

Rapid real-time monitoring of wheat nitrogen (N) status is crucial for precision N management during wheat growth. In this study, Multi Lookup Table (Multi-LUT) approach based on the N-PROSAIL model parameters setting at different growth stages was constructed to estimating canopy N density (CND) in winter wheat. The results showed that the estimated CND was in line with with measured CND, with the determination coefficient (R²) and the corresponding root mean square error (RMSE) values of 0.80 and 1.16 g m^-2, respectively. Time-consuming of one sample estimation was only 6 ms under the test machine with CPU configuration of Intel(R) Core(TM) i5-2430 @2.40GHz quad-core. These results confirmed the potential of using Multi-LUT approach for CND retrieval in winter wheat at different growth stages and under variables climatic conditions.

Conference Presentation

Citation Download Citation

Zhenhai Li, Na Li, Zhenhong Li, Jianwen Wang, and Chang Liu "Estimation of winter wheat canopy nitrogen density at different growth stages based on Multi-LUT approach", Proc. SPIE 10421, Remote Sensing for Agriculture, Ecosystems, and Hydrology XIX, 1042119 (2 November 2017); https://doi.org/10.1117/12.2278719

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