Spectroscopy and Spectral Analysis, Volume. 32, Issue 5, 1362(2012)
Estimated Nitrogen Nutrition Index Based on the Hyperspectral for Wheat of Drip Irrigation under Mulch
The accurate wheat management needs a reasonable nitrogen application, and it is one of the key measures for real-time and quantitatively monitoring of nitrogen status to gain the higher yield of wheat. In the present study, two field experiments were conducted with different nitrogen stress and wheat cultivars, the relationship was analyzed between spectral parameters and the partial factor productivity from applied N (PFPn), and the estimating model was established for PFPn in the growth stages of wheat. The result indicated that there was a highly significant correlation between the PFPn and GreenNDVI at jointing, the correlation coefficient (r) was 0.640 4, the estimating model of PFPn was established, and the root mean square errors(RMSE) was 0.459 7. The result indicated that the PFPn can be effectively estimated by using spectral parameters.
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DIAO Wan-ying, LI Shao-kun, WANG Ke-ru, JIN Xiu-liang, WANG Fang-yong, CHEN Bing, WANG Qiong, WANG Kai, XIAO Chun-hua. Estimated Nitrogen Nutrition Index Based on the Hyperspectral for Wheat of Drip Irrigation under Mulch[J]. Spectroscopy and Spectral Analysis, 2012, 32(5): 1362
Received: Nov. 9, 2011
Accepted: --
Published Online: Jun. 14, 2012
The Author Email: Wan-ying DIAO (diaowanying@126.com)