PRODUCTIVITY OF GUIZOTIA ABYSSINICA DEPENDING ON SEEDING RATE UNDER CONDITIONS OF THE MIDDLE VOLGA REGION

The aim of the research was to study the productivity of Abyssinian Guizotia depending on seeding rates under conditions of the Middle Volga region. The object of the research was Medea, the new variety of Guizotia. The study of seeding standards was carried out in 2016-2018. Five seeding rates were studied from 1.0 to 3.0 million viable seeds per hectare, with a pitch of 0.5 million viable seeds. The vegetation period of the crop proceeded under conditions of moderate moisture – HTC-1.2 and constituted 111-125 days. The productivity of Guizotia varied in the range of 1.63-1.75 t/ha, depending on the seeding rate. The highest seed yield was observed in the variant with a seeding rate of 2.0 million viable seeds per hectare and constituted 1.75 t/ha. Oil content of seeds ranged from 39.5-40.8%. The higher fat content was in the seeds in the variants with seeding rates of 2.0 and 2.5 million viable seeds per hectare and constituted 40.7-40.8%. Number of capitula per plant varied from 154.8 pieces per variant with a seeding rate of 3.0 million viable seeds/ha to 186.7 units – with a seeding rate of 1.0 million viable seeds/ha. The mass of 1000 seeds varied from 3.41 to 3.65 g. The largest seeds were the Guizotia when sown with a seeding rate of 2.5 and 2.0 million viable seeds per hectare. The optimal seeding rate of Guizotia under conditions of the Middle Volga region is 2.0 and 2.5 million viable seeds per hectare.