Produtividade de grãos e componentes do rendimento da aveia preta (Avena strigosa Schreb.) afetados pela densidade e velocidade de semeadura

A field experiment in randomized blocks with three replications was carried out in São Gabriel, Brazil, to evaluate seeding rate (30, 60 e 90kg ha-1 of viable seeds) and velocity (3.2; 5.3; 6.9 e 8.2km h -1 ) effect on grain yield and yield components of black oat (Avena strigosa Schreb.), under intensive cattle grazing. A minor number of panicles per m2 was observed for seeding rates of 30 and 60kg ha-1, witch was compensated for the major number of cariopsis per panicle, so that higher grain yields were obtained for these seeding rates. Seeding rates did not affect significantly the 1000 cariopsis weight. Number of plants per m 2 , grain yield and yield components (exception for number of caripsis per panicle) were not influenced by seeding velocity.