Assessment of plant water status in winter wheat (Triticum aestivum L.) based on canopy spectral indices.

ABSTRACT: Rapid and non-destructive estimation of plant water status is essential for adjusting field practices and irrigation schemes of winter wheat. The objective of this study was to find new combination spectral indices based on canopy reflectance for the estimation of plant water status. Two experiments with different irrigation regimes were conducted in 2015-2016 and 2016-2017. The canopy spectra were collected at different growth stages of winter wheat. The raw and derivative reflectance of canopy spectra showed obvious responses to the change of plant water status. Except for equivalent water thickness (EWT), other water metrics had good relationships with new combination spectral indices (R2>0.7). An acceptable model of canopy water content (CWC) was established with the best spectral inde

SUBMITTER: Sun H 

PROVIDER: S-EPMC6557497 | biostudies-literature | 2019

REPOSITORIES: biostudies-literature