Abstract

Chinese hybrid rice of different varieties, growing in paddies in the Pingqiao district, north of Xinyang city, Henan province, China, was studied in detailed spectroscopic characteristics using laser-induced fluorescence. The base for the studies was the new South China Normal University mobile lidar laboratory, which was dispatched on site, providing facilities both for laboratory studies using a 405 nm excitation source as well as remote sensing measurements at ranges from around 40 m–120 m, mostly employing the 532 nm output from a Nd:YAG laser. We, in particular, studied the spectral influence of the species varieties as well as the level of nitrogen fertilization supplied. Specially developed contrast functions as well as multivariate techniques with principal components and Fisher’s discriminate analyses were applied, and useful characterization of the rice could be achieved. The chlorophyll content mapping of the 30 zones was obtained with the remote sensing measurements.

© 2018 Optical Society of America

Reflectance and fluorescence characterization of maize species using field laboratory measurements and lidar remote sensing

Guangyu Zhao, Zheng Duan, Lian Ming, Yiyun Li, Ruipeng Chen, Jiandong Hu, Sune Svanberg, and Yanlai Han
Appl. Opt. 55(19) 5273-5279 (2016)

Optical characterization of Chinese hybrid rice using laser-induced fluorescence techniques—laboratory and remote-sensing measurements: publisher’s note

Duan Zheng, Ting Peng, Shiming Zhu, Ming Lian, Yiyun Li, Fu Wei, Jiabao Xiong, Sune Svanberg, Quanzhi Zhao, Jiandong Hu, and Guangyu Zhao
Appl. Opt. 57(19) 5258-5258 (2018)

Effect of fluorescence characteristics and different algorithms on the estimation of leaf nitrogen content based on laser-induced fluorescence lidar in paddy rice

Jian Yang, Jia Sun, Lin Du, Biwu Chen, Zhenbing Zhang, Shuo Shi, and Wei Gong
Opt. Express 25(4) 3743-3755 (2017)

Estimating the leaf nitrogen content of paddy rice by using the combined reflectance and laser-induced fluorescence spectra

Jian Yang, Lin Du, Jia Sun, Zhenbing Zhang, Biwu Chen, Shuo Shi, Wei Gong, and Shalei Song
Opt. Express 24(17) 19354-19365 (2016)

Potential of spectral ratio indices derived from hyperspectral LiDAR and laser-induced chlorophyll fluorescence spectra on estimating rice leaf nitrogen contents

Lin Du, Shuo Shi, Jian Yang, Wei Wang, Jia Sun, Biwu Cheng, Zhenbing Zhang, and Wei Gong
Opt. Express 25(6) 6539-6549 (2017)