Authors:
N. I. Burtseva,
E. I. Molokantseva
All-Russian Research Institute of Irrigated Agriculture, Volgograd, Russia
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Abstract. The purpose of the experiment was to develop a technology for cultivating meadow clover under irrigationto obtain the planned seed yields in the conditions of the Lower Volga region. Research methods. Fieldexperiments, records and observations were carried out in accordance with the generally accepted methods of experimentalwork. As a result of the research, it was found that the total water consumption of clover crops variedover the years of the herbage life and depended on the given pre-irrigation threshold of soil moisture. It was highestin the variants with the maintenance of the 70 % pre-flood threshold: 3.6–3.9, the lowest 2.7–3.1 thousand m3/ha inthe variants with the 60 % humidity threshold. With the differentiation of humidity by the development phases, thetotal water consumption varied from 3.1 to 3.5 thousand m3/ha. The share of irrigation water in the structure of totalwater consumption was 60.6–72.7 % according to the experimental variants. The leaf area depended on the waterand nutrient regimes of the soil: it reached the maximum values in the variants with a 70 % pre-irrigation thresholdof humidity and fertilization. In comparison with the increase in biomass, the seed productivity of clover was lessdependent on the photosynthetic potential and assimilation surface. The highest seed yields were formed in the variantswith improved nutrition background and maintenance of a differentiated irrigation regime – 280–730 kg/ha. Theaccumulation of a significant amount of root mass by clover had a positive effect on improving the ecological stateof the irrigated area: the water-physical properties of the soil improved, and nutrients accumulated in it. Scientificnovelty. In the conditions of the Lower Volga region, the dependence of the seed productivity of clover on the availabilityof water and nutrients, on the age of the herbage, was revealed. Their optimal combination is determined forthe production of seed yields at the level of 400–700 kg/ha.
Keywords: meadow clover, irrigation, nutrition background, seed yield.
For citation: Burtseva N. I., Molokantseva E. I. Poluchenie semyan klevera lugovogo v Nizhnem Povolzh’e prioroshenii [Obtaining seeds of meadow clover in the Lower Volga region under irrigation] // Agrarian Bulletin of theUrals. 2021. No. 08 (211). Pp. 2−10. DOI: 10.32417/1997-4868-2021-211-08-2-10. (In Russian.)
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