Purpose: to determine the compliance of the agroclimatic and ecological and reclamation conditions of the experimental site, located in the Azov agricultural zone of Rostov region, with the requirements of cotton plant.
Materials and methods: research was carried out on chernozem soils of an experimental plot located in Rostov region, in accordance with generally accepted methods.
Results. The weather conditions of the site, photosynthetically active radiation (PAR) and total solar radiation were analyzed. The soil texture was determined: clayey and heavy clayey. The soils are not saline, but the soil absorption complex (SAC) contains 3–5 % of exchangeable sodium, which indicates the presence of sodium alkalinity with a large amount of exchangeable magnesium (30–41 %). The humus content does not exceed 2 %. The presence of a capillary fringe was determined, confirming a rise of groundwater level to 1.3–1.5 m in the spring.
Conclusions. A comparative assessment showed that meteorological conditions almost completely meet the requirements of early and mid-ripening cotton cultivars. The lack of moisture is regulated by irrigation. For the normal development of this crop, PAR is not enough (36.1 kcal/cm² with a need of more than 40 kcal/cm²). Soil conditions generally also meet environmental requirements, but the growth and development of cotton can be adversely affected by nearby groundwater, the lack of exchangeable calcium (62 % of ∑ SAC) and an excess of exchangeable magnesium (36 % of ∑ SAC).
cotton, meteorological conditions, average daily temperature, soil conditions, photosynthetically active radiation, total solar radiation, environmental requirements
Dokuchayeva L. M., Yurkova R. Ye., Babichev A. N., Nedotsukova Ju. I. Compliance of agroclimatic conditions and soil reclamation state of the site with the cotton plant requirements. Ways of Increasing the Efficiency of Irrigated Agriculture. 2023;91(3):344–358. (In Russ.).
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