Purpose: to assess the heat and moisture supply of the Ilovlinsky agricultural area by calculating the moisture coefficient based on initial meteorological observations to substantiate the irrigation rates for agricultural crops in their cultivation areas in the Volgograd region. Analysis of the heat and moisture resources availability is fundamental for assessing and improving the sustainability of agriculture, adapting agricultural systems to the impacts of negative seasonal and climatic fluctuations.
Materials and methods. The work is based on the method of determining the moisture coefficient given by N. V. Danilchenko. The object of the study is the Ilovlinsky agricultural production area. The initial data were retrospective meteorological observations from 1973 to 2023 for the estimated warm period of May – September. Analysis of the heat and moisture resources availability allows to identify local climatic features that will help in making decisions on increasing the sustainability of agriculture in the region.
Results. The results of the study revealed that in an average year (50 %), the agricultural lands of the Ilovlinsky district are provided with the heat summation ∑T and atmospheric precipitation ∑P at the level of 2963 °C and 196 mm, respectively, with a moisture coefficient of KuD = 0.30. The average value of the ∑T indicator in the study area is considered typical and reliable (variation coefficient Cv = 7 %), while risk levels are present in the determination of ∑P provisions (variation coefficient Cv = 31 %). The conducted analysis of the trend of heat and moisture provision in the Ilovlinsky district indicates a decrease in the provided ∑P by 2 mm and an increase in ∑T by 105 °C. Conclusions. The results of the study of long-term meteorological data for the area under study allow us to conclude that the weather during the growing season of different years is variable, which, in the absence of adaptation measures, significantly affects fluctuations in crop yields.
heat supply, moisture supply, moisture coefficient, agroclimatic assessment of lands, irrigation rate justification
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