Ecological Systems and Devices Annotation << Back The Influence of Environmental Factors on the Bioproductivity of Pasture Lands of the North-Western Caspian Region Dedova E.B., Konieva G.N., Dedov A.A., Ochirov V.V., Aduchieva M.G. The article presents the results of the analysis of multiple correlation and regression between the yield of pasture crops and natural and anthropogenic factors that generally affect the reclamation state of natural forage lands. The purpose of the research is to determine the role of the main factors on the structure and dynamics of plant communities in the desertsemi-desert zone of the Republic of Kalmykia. The results of fi eld studies using geobotanical, ecological, statistical and computational design methods for analyzing the bioproductivity of pasture agroecosystems for the period 2019–2023 are shown. The patterns of changes in agro-climatic indicators and their correlative relationships with the seasonal yield of forage grasses are determined. Models of bioproductivity of pasture agroecosystems for the Russian Caspian region have been developed. The optimal parameters of the infl uence of various factors on the productivity of pasture crops have been identifi ed. The dependences of the yield of pasture plants on the meteorological and anthropogenic conditions of the growing year have been established, which makes it possible to assess the level of animal forage supply in natural pastures. Keywords: pasture agroecosystems, bioproductivity, degradation, allowable pasture load, agro-climatic indicators, correlation and regression analysis, modeling, response function. DOI: 10.25791/esip.11.2024.1482 Pp. 03-10.