Desempenho agronômico de cultivares de soja em diferentes épocas de semeadura no cerrado do Distrito Federal

AUTOR(ES)
DATA DE PUBLICAÇÃO

2009

RESUMO

In the Brazilian Savannahs, as a general breeding procedure, cultivars, progenies and other soybean genotypes are grown under ample environmental conditions, before they are released to cultivation. The variations comprise different soil types, fertility levels, moisture regime, sowing dates, temperature and cultivation patterns. An outstanding cultivar in one environment might not show the same result in others. This change in response, demonstrated by the relative performance of genotypes, expresses interaction with the environment. It is paramount to know the types of interactions to best define schemes, covering several growing seasons, with the purpose of selection effectiveness. On the other hand, sowing at inadequate dates may reduce yield and affect other agronomic characteristics, compromising farmers income. Sowing in different dates allows the expression of potentialities and limitations by cultivars and genotypes to be recommended. As soybean genotypes may respond to the environment, in relation to their difference in day length sensitivity, the indications of best sowings should be supported by regional experiments, conducted for more than one year in various dates. This research, as part of a joint breeding programme from Embrapa, aimed at defining the effect of sowing dates on soybean genotypes, between 2005 and 2008 in Planaltina, DF, Brazil

ASSUNTO(S)

cultivar resposta ao fotoperíodo yield, cultivar day length response glicine max rendimento genótipo ciencias agrarias glicine max genotype

ACESSO AO ARTIGO

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