Long-term Dynamics of the Vegetation Index for Abandoned Farmlands in the Central Chernozem Region of Russia
DOI:
https://doi.org/10.52575/2712-7443-2021-45-4-505-515Keywords:
abandoned agricultural lands, long-term dynamics, vegetation indices, reforestation, Central Chernozem Region, remote sensing dataAbstract
Analysis of long-term changes in vegetation is one of the key tasks in assessing the state of abandoned lands, especially in regions of active agricultural use. Estimating the satellite-derived time-series of vegetation indices is one of the options for solving this problem. The article analyzes NDVI vegetation index dynamic of abandoned lands in the Central Chernozem Region of Russia in the period 2000–2018. The research was carried out on abandoned farmlands with various types of forests. The positive dynamics of the vegetation index for the abandoned lands with deciduous tree species was revealed in all parts of the Region. At the same time, the trend significance is different in the oblasts of the region. For the abandoned lands with deciduous trees, statistically significant trends were established in the areas located closest to the forest zone. The abandoned farmlands with coniferous and mixed forests are characterized by statistically significant, positive dynamics in most of the studied oblasts. The abandoned agrarian lands with coniferous forests are characterized by the highest intensity of the increase in the vegetation index values during the study period. The slope coefficient of the vegetation index trend differs significantly between the oblasts of the region for both abandoned lands with deciduous and coniferous species. Taking into account the high correlation between NDVI and the forest cover, the revealed changes characterize the reforestation on these lands.
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