Agronomic performance of white oats in organic system in the northwest region of Rio Grande do Sul

This work aimed to position white oat cultivars for the organic system, and to highlight which characteristics determine grain yield and their interrelationships. The research was conducted at Instituto Regional de Desenvolvimento Rural belonging to Universidade Regional do Noroeste do Estado do Rio Grande do Sul, located in the municipality of Augusto Pestana – RS. The experimental design used was randomized blocks with treatments arranged in four replications. The treatments corresponded to the cultivars: IPR Artemis, IPR Afrodite, URS Corona, URS Brava and URS Taura. The characters measured in the useful area of ​​each experimental unit were: final plant population per square meter (PPSM, units), days between sowing and flowering (DF, days), days between sowing and maturation (DM, days) , number of tillers (TILL, units), percentage of lodging (LOG, %), intensity of diseases damage (INTD, %), plant height (PH, cm), height of panicle insertion (HPI, cm), number of panicles per square meter (NPSM, units), number of grains per panicle (NGP, units), grain weight per panicle (GWP, g), thousand grain weight (TGW, g), grain yield (GY, kg). The cultivar URS Afrodite is superior for plant height, height of panicle insertion, number of panicles per square meter. The cultivar URS Corona stood out for the number of grains per panicle, grain weight per panicle with a grain yield of 1885.08 kg ha-1 and low incidence of diseases, being recommended for the organic system in the Northwest region of Rio Grande do Sul.