Festulolium (× Festulolium F. Aschers. et Graebn.) is a new crop, the varieties of which are created by the method of species hybridization in the Lolium and Festuca genus system. A new amphidiploid cultivar Ayvengo was obtained as a result of intergeneric hybridization of multi-cutting ryegrass and reed fescue (Lolium multiflorum Lam. × Festuca arundinacea Schreb. subsp. arundinacea). Registered in the State Register since 2022. Tetraploid variety of ryegrass morphotype. It is characterized by a combination of fodder advantages of multicut ryegrass with winter hardiness, drought resistance and longevity of cane fescue, high ecological plasticity. According to the type of development, it belongs to winter plants and does not form generative shoots in the year of sowing. Differs in resistance to diseases, competitiveness in grass mixtures, fast and intensive regrowth after grazing or mowing. Distinctive morphological features, features of growth and development of this variety, as well as its fodder qualities, productivity, chemical composition of green mass, its advantages and differences from the standard festulolium variety VIK 90 are given. The seed yield of the Ayvengo variety, on average, for two tabs of the competitive variety trial was: in the first year of use 1.09 t/ha, in the second year — 0.66 t/ha and in the third year — 0.34 t/ha. On average, over the three years of use, the seed yield was 0.70 t/ha, which is 10% more than the standard variety VIK 90. In terms of feed quality and fodder productivity, hay yield, the new variety is 10.7–19.9% higher than standard and analogues of varieties of the original parental forms.

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Creeping clover (Trifolium repens L.) is one of the best crops for creating meadow and pasture agrophytocenoses of long-term use. The biological features of this crop, such as durability, good yield, resistance to grazing, high leafiness, along with good feed quality indicators, its high protein nutritional value, make it indispensable when creating pastures not only in Russia, but also abroad. Creeping clover is one of the main components of grass mixtures for improving pastures and developing fallow lands; it is also an excellent phyto-meliorative crop that restores soil fertility. The most important problem of creeping clover seed production is harvesting due to the short stature of pasture varieties. Therefore, it is recommended to grow creeping clover for seeds in a mixture of grass together with cereal components such as perennial ryegrass, reed fescue, meadow fescue, etc. Due to the use of biological nitrogen of the legume component, energy consumption for the production of 1 kg of cereal grass seeds is reduced by 20–30% in comparison with uncoverless single-species crops. In addition to clover seeds, growing in grass mixtures allows you to get high yields of grass seeds in the second year of use without the use of nitrogen fertilizers.