Agrobiological and agrochemical aspects of increasing the yield of sunflower hybrids in the Saratov Trans-Volga region


 Abstract. The article provides an analysis of agrobiological (hybrids, seeding rate) and agrochemical (mineral fertilizers) aspects increasing the yield quality sunflower in Saratov Trans-Volga region. results three-year studies have established that cultivation hybrid P64LE25 using Ammophos at a dose 80 kg/ha before main tillage Sulfoammophos 50 when sown rate 60000 pcs. germinating seeds per 1 ha ensures maximum oilseeds - 2.02 t/ha. Increasing from 55 thousand to 65 seeds/ha reduced planting density field germination by 3.2–3.4%. Mineral fertilization 0.7–1.5%. late-ripening increases 0.28 t/ha (by 18.8%), oil content 2.5% compared mid-early P64F66. pcs/ha studied hybrids 0.23 15.4%). (N8P10S6) increase 0.24 15.9%), 0.4%.