Russian Federation
The paper deals with studies of the structure and spectral characteristics of the herbaceous plant communities of hay lands of the Krasnoyarsk re- gion. The studies were conducted during the grow- ing season of 2018 in the hay lands of Sukhobuzimsky (Borsk) and Yemelyanovsky (Minino) districts. As a result of the analysis of sat- ellite data and field reconnaissance studies, two test sites were identified. The size and structure of the grass stand allows to obtain statistically reliable satellite and ground-based remote data. For the first time in the Krasnoyarsk region, was applied an integrated methodological approach using ground- based spectrometry based on a Spectral Evolution PSR 1100F spectroradiometer and simultaneous geobotanical descriptions, which significantly in- creases the representativeness of the result. The conducted studies show that the considered grass- lands of the Krasnoyarsk forest-steppe differ signif- icantly in species composition and structure of the grass stand, which is associated with different ori- gins. Moisture conditions in the central part of the Krasnoyarsk region contribute to the formation of productive plant communities with well-eaten domi- nant Bromus inermis Leyss and Elytrigia repens (L.) Nevski. The productivity of the wet phytomass varies from 501 to 896 g/m2. In the course of the ground-based spectrometric measurements, it was shown that the reflection spectra of the grass stand before and after haying differ significantly in the magnitude of the spectral brightness coefficient. The data will be used in the future to verify the re- mote data of various satellite systems and to con- struct maps of the distribution of spectral indices on the hay fields of the Krasnoyarsk region.
remote sensing, ground-based spectrometry, spectral brightness coefficient, above-ground phytomass, hay lands, Krasnoyarsk forest-steppe
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