três repetições e sete cultivares: Franciscana IPA-10 (roxa), Vale Ouro IPA-11 e Brisa IPA-12, (Empresa Pernambucana de Pesquisa Agropecuária-IPA), Alfa Tropical (Embrapa Hortaliças), Alfa São Francisco (ciclo VIII) e Alfa São Francisco-RT (resistente ao tripes-genótipo em teste) da Embrapa Semi-árido e BR-29 (Topseed-Agristar). Foram realizadas avaliações biométricas lineares e não lineares e características produtivas. Verificou-se que a produção orgânica de cebola estabelecida fora do período tradicional da região metropolitana de Curitiba é possível, sendo as cultivares da Embrapa, Alfa São Francisco, Alfa Tropical e Alfa São Francisco-RT, as que apresentaram melhor desempenho quanto ao desenvolvimento e produtividade. Palavras-chave: Allium cepa, características biométricas, produtividade AbstractThis experiment was conducted in the organic area of Canguiri experimental farm, in the metropolitan area of Curitiba-PR, aiming to evaluate the growth of open pollinated onion cultivars, in organic system, seeded in January -a nontraditional period. The experimental design was completely randomized, with three replications and seven cultivars: Franciscana IPA-10 (purple), Vale Ouro IPA-11 e Brisa IPA-12 (from Empresa Pernambucana de Pesquisa Agropecuária -IPA), Alfa Tropical (from Embrapa Hortaliças), Alfa São Francisco (VIII cycle) e Alfa São Francisco-RT (thrips resistant -genotype under test; from Embrapa Semi-árido) e BR-29 (Topseed-Agristar). Biometric linear and nonlinear evaluations and productive characteristics were undertaken. We verified that the organic production of onion established in a nontradicional period in metropolitan area of Curitiba is possible, mainly for the following cultivars of Embrapa: Alfa São Francisco, Alfa Tropical and Alfa São Francisco-RT that showed the best performance and productivity.
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