Sunflower SPSHN is a late-maturing hybrid intended for cultivation in various agroclimatic zones, including the Northern, Northwestern, Central, Volgo-Vyat, Central Chernozem, North Caucasus, Middle Volga, Lower Volga, Ural, West Siberian, East Siberian, and Far Eastern regions. It is recommended for cultivation in all agroclimatic zones of the Altai Krai. Plants reach a medium-high height of 150-170 cm, exhibit resistance to lodging and shattering, which helps preserve yield and facilitates harvesting. The vegetation period is approximately 117 days, corresponding to a late maturation period. SPSHN is characterized by high dry matter content in green mass during the flowering phase — from 17.4% to 21.7%, as well as high levels of mono- and polysaccharides (6.8–7.4%). In the leaf-stem mass during the milky-wax ripening stage, used for silage, crude protein content reaches 10.9–11.4%, and digestible protein — 7.6–9.0%. Dry matter content varies from 25.8% to 29.9%, with fatty acid content not exceeding 0.5%, and lactic acid content of 4.2–4.5%. Feed units per hectare reach 2.77, making this variety promising for feed use. The hybrid demonstrates high resistance to various races of downy mildew (A-G) and is tolerant to diseases such as phomopsis, gray, and white rot. Due to these qualities and adaptability to stress factors, SPSHN ensures stable yield and product quality. Seeds have medium to large size, with a 1000-seed weight of approximately 59 g. This sunflower is suitable for cultivation in various regions with different climatic conditions, making it a versatile choice for farmers aiming to achieve high-quality yields.
