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Seeding rate of two cultivars of vetch on agronomic traits and chemical composition/Densidade de semeadura de duas especies de ervilhaca sobre caracteres agronomicos e composicao bromatologica

The plant stand is one of the main yield components amending crop productivity, maximizing productive environment for culture. In this sense the objective with this study was to evaluate forage production and chemical composition of two cultivars of common vetch at different densities. The experimen...

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Bibliographic Details
Published in:Ciência rural 2015-02, p.245
Main Authors: O, Ma, Brum, Marcos da Silva, Nunes, Nathalia Vasconcelos, Stecca, Jessica Deolinda Leivas, Ludwig, Rodrigo Luiz
Format: Article
Language:Spanish
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Summary:The plant stand is one of the main yield components amending crop productivity, maximizing productive environment for culture. In this sense the objective with this study was to evaluate forage production and chemical composition of two cultivars of common vetch at different densities. The experiment was conducted in 2011, in an area of the Crop Science of the Department of the Federal University of Santa Maria, Rio Grande do Sul. Treatments consisted of two genotypes of vetch (hairy vetch and common vetch) at four seeding rates (50, 100, 150 and 200 seeds [m.sup.-2]). The experimental design was a randomized blocks design, arranged in (2x4) factorial design with four replications. The ADF values increased with increasing seeding rate, which did not occur for the other qualitative characteristics evaluated. The optimum seeding rate should be adjusted according to the cultivar and cutting, ranging 66-200 viable seeds per square meter. The total dry matter production is maximized when the seeding rate is 136 seeds [m.sup.-2]. Key words: green manure, legumes, forage production, Vicia sativa L., Vicia villosa Rotl. O estande de plantas e um dos principais componentes do rendimento que altera a produtividade das culturas, maximizando o ambiente produtivo para a cultura. Nesse sentido, objetivou-se com este trabalho avaliar a producao de forragem e a composicao quimica de duas especies de ervilhaca em diferentes densidades de semeadura. O experimento foi conduzido no ano de 2011, em area experimental do Departamento de Fitotecnia da Universidade Federal de Santa Maria, Rio Grande do Sul. Os tratamentos constaram de duas especies de ervilhaca (ervilhaca peluda e ervilhaca comum) em quatro densidades de semeadura (50, 100, 150 e 200 sementes [m.sup.-2]). O delineamento experimental utilizado foi o de blocos ao caso, disposto em fatorial (2x4), em quatro repeticoes. Os valores de FDA aumentaram conforme o aumento da densidade de semeadura, o que nao ocorreu para as demais caracteristicas bromatologicas avaliadas. A densidade otima de semeadura deve ser ajustada conforme a especie e o corte, variando de 66 a 200 sementes viaveis por metro quadrado. A producao de massa seca total e maximizada quando a densidade de semeadura for de 136 sementes viaveis [m.sup.-2]. Palavras-chave: adubacao verde, leguminosa, producao de forragem, Vicia sativa L., Vicia villosa Rotl.
ISSN:0103-8478
DOI:10.1590/0103-8478cr20140291