Optimization Of The Irrigation Of Agricultural Crops Regime On Sod-Podzolic Soils Of Watershed Areas Of The Non-Chernozem Zone Of The Russian Federation

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Victor Vladimirovich PCHELKIN , Yuri Ivanovich SUKHAREV , AleksandrEvgenievich KASIANOV , OlegViktorovich KABLUKOV , Kristina Sergeevna SEMENOVA

Abstract

The studies carried out in lysimeters and at the experimental site in 2010–2017 formed the basis for the development of an irrigation regime for agricultural crops. When conducting scientific research on the water regime of sod-podzolic soils during irrigation of agricultural crops, the technique developed at the Department of Land Reclamation and Reclamation of the Russian State Agricultural University — Moscow Timiryazev Agricultural Academy. Formula for calculating water consumption for research conditions has been obtained.  Empirical coefficients for this equation are established, depending on the natural climatic zone and soils. The biological coefficients for beetroot, oat and vetch mixture, potatoes, carrots and coefficients that consider the decrease in soil moisture from the optimal values for these crops have been determined. A formula for calculating water consumption for the conditions of research has been obtained. The optimal limits of moisture content of sod-podzolic soil of watersheds are revealed. A relationship has been established between the calculated depths and numbers of decades from the beginning of the growing season of plants. The irrigation regime calculated according to the modernized model of A.I. Golovanov, for research conditions. A graph of the relationship between the actual values of irrigation norms (Mf) and the calculated ones (Mr) is presented. A comparative analysis was carried out, which showed that the irrigation norms obtained during the development and substantiation of the irrigation regime of the studied crops (Table 5) are not contradictory in comparison with the irrigation norms recommended by other authors (Table 6).

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