title: [Estimated nitrogen nutrition index based on the hyperspectral for wheat of drip irrigation under mulch].
abstract: 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 PFP, in the growth stages of wheat. The result indicated that there was a highly significant correlation between the PFP, and GreenNDVI at jointing, the correlation coefficient (r) was 0.6404, the estimating model of PFPn was established, and the root mean square errors (RMSE) was 0.4597. The result indicated that the PFPn can be effectively estimated by using spectral parameters.
authors: Key Laboratory of Oasis Ecology Agriculture of Xinjiang Construction Crops, Shihezi University, Shihezi 832003, China. diaowanying@126.com
authors: Wan-ying
authors: WY
authors: Diao
authors: Shao-kun
authors: SK
authors: Li
authors: Ke-ru
authors: KR
authors: Wang
authors: Xiu-liang
authors: XL
authors: Jin
authors: Fang-yong
authors: FY
authors: Wang
authors: Bing
authors: B
authors: Chen
authors: Qiong
authors: Q
authors: Wang
authors: Kai
authors: K
authors: Wang
authors: Chun-hua
authors: CH
authors: Xiao
mesh_terms: D057914:Agricultural Irrigation; D009584:Nitrogen / Q000032:analysis*; D015596:Nutrition Assessment; D013057:Spectrum Analysis; D014908:Triticum / Q000737:chemistry* / Q000254:growth & development
chemical_list: D009584:Nitrogen