To study the effect of physiologically active substances on the feed and seed productivity of annual white sweet clover (Melilotus albus Medic.)

In the current conditions of agricultural production, optimization of the feed base of domestic livestock through the development and implementation of innovative technologies for the production of high-quality feed, including effective methods of cultivating legumes using physiologically active substances, in particular, annual white sweet clover, is of paramount importance. In this regard, the aim was to identify the effect of the preparations “Mival Agro”, “Vitanoll N” and “Vitanoll RK” on biometric indicators and productivity of annual white sweet clover varieties Zavolzhsky and Srednevolzhsky. The research was conducted in 2020–2023 in the south of the forest-steppe zone of the Middle Volga region. The object of research is the white annual sweet clover, the Middle Volga variety, and the Zavolzhsky variety. The use of physiologically active substances (FAV) has a positive effect on the agrobiological parameters of annual white sweet clover in the conditions of the Middle Volga region. It was found that treatment with “Vitanoll N” and “Vitanoll RK” preparations slightly prolongs the growing season, compensated by increased productivity. FAVS stimulate the growth and development of sweet clover, increasing plant height, foliage, green mass and dry matter content (“Vitanoll N” is a Middle Volga variety, “Vitanoll RK” is a Zavolzhsky variety). The use of “Mival Agro”, “Vitanoll N” and “Vitanoll RK” increases the yield of seeds, especially in the Zavolzhsky variety. The treatment of FAV affects the chemical composition of sweet clover, increasing the content of protein (“Mival Agro”, “Vitanoll RK”) and carotene (“Vitanoll N”, “Vitanoll RK”) in a completely dry substance. The results obtained indicate the prospects of using FAV to increase productivity and improve the quality characteristics of annual white sweet clover.