Sensitivity of Vegetation Indices for Estimating Vegetative N Status in Winter Wheat.

ABSTRACT: Precise sensor-based non-destructive estimation of crop nitrogen (N) status is essential for low-cost, objective optimization of N fertilization, as well as for early estimation of yield potential and N use efficiency. Several studies assessed the performance of spectral vegetation indices (SVI) for winter wheat (Triticum aestivum L.), often either for conditions of low N status or across a wide range of the target traits N uptake (Nup), N concentration (NC), dry matter biomass (DM), and N nutrition index (NNI). This study aimed at a critical assessment of the estimation ability depending on the level of the target traits. It included seven years' data with nine measurement dates from early stem elongation until flowering in eight N regimes (0-420 kg N ha-1) for selected SVIs. Tested acros

SUBMITTER: Prey L 

PROVIDER: S-EPMC6749256 | biostudies-literature | 2019 Aug

REPOSITORIES: biostudies-literature