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With the objective of evaluating the decomposition and soil cover of black oat (Avena strigosa Schreb) in succession with maize (Zea mays L.) in no-tillage system, it was installed an experiment in Ponta Grossa PR, Brazil. The experiment was laid out as random block design with split-plot and four replications. The main treatments were composed by four mechanical management systems of oat ( knife-rolled before and after seeding of maize, shredder and chopper) set up in 14.4 x 6 m plots. The split-plot (7.2 x 6m) treatments were with and without chemical desiccation with glyphosate. It was evaluated the index of cover of the oat and the output of dry biomass throughout the cycle of the culture of the maize. The rates of decomposition of the black oat and index of soil cover had differed statistically only in the second evaluation (22 days after seeding of the maize). Maize grain yield in succession to oat was not influenced by management systems of oat straw.

MANEJO DA AVEIA PRETA NA DECOMPOSIÇÃO DA BIOMASSA E NA COBERTURA DO SOLO EM SEMEADURA DIRETA DE MILHO