The assessment of the state of grasslands on the basis of ground and satellite spectrometry

The study of the structure and spectral characteristics of herbaceous plant communities of grasslands of Krasnoyarsk Region was carried out. The researches were carried out during vegetation seasons of 2018-2019 on agricultural land of Emelyanovo district of Krasnoyarsk Region (s. Minino). As a result of the analysis of satellite data (Sentinel-2) and ground-based spectrometry data (based on the Spectral Evolution PSR 1100F spectroradiometer), test sites, their size and structure of herbage allowed obtaining statistically reliable data. Geobotanical descriptions of vegetation for ground-based data verification were carried out. Performed researches showed that spectral characteristics of grasslands during vegetation season significantly differed from the lands with another type of land use. According to satellite data, in early-summer phase of vegetation season, NDVI values were identical in test plots with similarity in species composition. As a result of the mowing carried out on one of the plots NDVI values decreased by 35 % which was connected with the withdrawal of the most part of the plants’ above-ground phytomass...