Abstract
The work presents the results of the author's own research on the study of seasonal dynamics of biological productivity of the main associations of the complex steppes of Western Kazakhstan. In various ecological and microclimatic conditions, the accumulation of above-ground and underground phytomass during the season is considered, as well as the production and destruction processes in plant communities are analyzed. Based on the results of the research, recommendations were developed for the preservation of steppe ecosystems and the rational use of pasture lands during the growing season, including in years with different hydrothermal regimes. The biological productivity of vegetation, in combination with climatic factors, has ensured the fertility of the soils of the steppe zone for centuries, which is the main granary of agriculture and animal husbandry. Practically frontal plowing of the steppe of Kazakhstan, more than 70%, contributed to the transformation of steppe vegetation on large areas.
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