Abstract
Meadow clover remains the main forage crop in the middle Urals with great potential. An urgent problem is the development and improvement of the technology of this crop cultivation, including the search for adapted varieties. The aim of the research is to estimate the fodder and seed productivity recommended by the originators of meadow clover varieties of Russian and foreign selection VIK 77, Diplo, Lestris, Ranniy 2, Kudesnik in the Middle Ural region. The studies were carried out in 2017-2019 in the forest-steppe zone of the Udmurt Republic on sod-medium-podzolic medium loamy soil. The Dymkovsky variety included in the State Register of Breeding Achievements in the Volga-Vyatka region was used as a standard. Clover varieties were sown in 2017, comprehensive study in 2018-2019. The meteorological conditions of the growing seasons during the study years were different: 2017 and 2019 - over moistened (hydrothermal coefficient – 1.97 and 1.73), 2018 - dry (hydrothermal coefficient – 0.89). Winter hardiness of meadow clover varieties was estimated at 4.5 points. Varieties Diplo, Lestris and Ranniy 2 reached mowing ripeness in 58-63 days, varieties Dymkovsky, VIK 77 and Kudesnik – in 66-70 days. The varieties Diplo, Ranniy 2 and Kudesnik provided a dry matter yield of 6.2-6.8 t/ha, on average for two years of using meadow clover grass-stand. The highest yield of metabolizable energy (51.2 and 55.0 GJ/ha), digestible protein (0.44 and 0.46 t/ha) and feed units (3.79 and 4.09 thousand feed units/ha) was found in the standard variety Dymkovskiy and the tetraploid variety Kudesnik. Seed productivity of cultivars of meadow clover of the 1st year of use was at the level of 137-314 kg/ha, the highest - 314 kg/ha in the standard variety Dymkovsky
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