LANDSCAPE INTERPRETATION OF THE DIFFERENCES IN THE SEASONAL DYNAMICS OF THE VEGETATION INDEX EVI FOR THE SURFACE OF ARABLE LAND IN BRYANSK OBLSAT
The material is regularities in the geographical distribution of the vegetation index EVI within the borders of Bryansk Oblast (the basin of the upper Dnieper, South-Western part of Russia) during the spring months in 2010-2015.We made a systematic representation of landscape-indicative properties of the index, the technology of its receipt. The factors of geographical distribution of the index known from monitoring of arable lands in different regions are described. Examples of the inﬂuence of abiotic (topography, soil) and biotic factors on the distribution of the EVI. It is shown that the inﬂuence of edaphic factors is best traced in the period from the end of snowmelt to the beginning of active vegetation. A brief description of the method of systematization of information about the distribution of EVI is given. The generalized data of meteorological observations of 2010- 2 015 are presented, the inﬂuence of their strong variability on the range of EVI values and the peculiarities of the geographical distribution of the index is shown. Features of arable lands of Bryansk Oblast as model objects of landscape interpretation of EVI are brieﬂy described. Information is provided on the geographical differences in the distribution of EVI in the springs of 2010-2015, which are explained by the different timing of the onset of phenological seasons, surface topography (ﬂat and convex watersheds, drainage conditions); lithological composition and humus content in the upper horizons of arable soils. Provides maps of the distribution of EVI in the time intervals corresponding to the time of the shooting. The landscape substantiation of connection of spring dynamics of EVI arable lands and complex of edaphic components of agricultural landscapes is presented; describes the nature of the relationships that underlie such differences. The necessity to use the distribution pattern of EVI in years with different climatic conditions for the identiﬁcation of arable land, different surface topography and soil characteristics.