Agronomic characteristics and oil content of rapeseed as a function of sown date/ Caracteristicas agronomicas e teor de oleo da canola em funcao da epoca de semeadura

The aim of this study was to evaluate the influence of different sowing dates on plant population, yield and oil content of rapeseed (Brassica napus L.) crop in 2012. A completely randomized block design in a split-plot 2 x 7 was used with seven sowing dates: 24/03/12, 07/04/12, 21/04/12, 05/05/12,...

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Bibliographic Details
Published in:Revista brasileira de engenharia agrícola e ambiental 2014-09, Vol.18 (9), p.934
Main Authors: Melgarejo. A., Milciades A, Duarte, Jr., Jose B, da Costa, Antonio C.T, Mezzalira, Eder J, Piva, Andre L, Santin, Anderson
Format: Article
Language:Spanish
Subjects:
Plant populations
Rain and rainfall
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Summary:The aim of this study was to evaluate the influence of different sowing dates on plant population, yield and oil content of rapeseed (Brassica napus L.) crop in 2012. A completely randomized block design in a split-plot 2 x 7 was used with seven sowing dates: 24/03/12, 07/04/12, 21/04/12, 05/05/12, 19 / 05/12, 02/06/12 and 16/06/12 and two hybrids: Hyola 61 and Hyola 433. The yield and oil content were similar among treatments, on average 1058 kg [ha.sup.-1] and 38.2%, respectively. The advancement in sowing times reduced productivity and oil content. To obtain higher grain yields, with higher oil content in the grain, it is recommended to sow hybrids Hyola 61 and Hyola 433 until 20/04, especially if there is expectation of low rainfall during the winter period. Key words: Brassica napus L. var oleifera yield population Propos-se, com este trabalho, avaliar a influencia das diferentes epocas de semeadura sobre a populacao de plantas, produtividade e teor de oleo da canola (Brassica napus L.) na safra de 2012. Utilizou-se o delineamento experimental em blocos casualizados, em esquema de parcelas subdivididas 7 x 2, sendo sete epocas de semeadura: 24/03/12; 07/04/12; 21/04/12; 05/05/12; 19/05/12; 02/06/12 e 16/06/12 e dois hibridos: Hyola 61 e Hyola 433. As produtividades e os teores de oleo foram semelhantes entre os hibridos, com medias de 1058 kg [ha.sup.-1] e 38.2%, respectivamente. O avanco nas epocas de semeadura reduziu a produtividade e o teor de oleo. Para obtencao de maiores rendimentos de graos com maior conteudo de oleo nos graos, recomenda-se a semeadura dos hibridos Hyola 61 e Hyola 433 ate 20/04, especialmente se houver expectativa de baixas precipitacoes no periodo do inverno. Palavras-chave: Brassica napus L. var oleifera produtividade populacao
ISSN:1415-4366
DOI:10.1590/1807-1929/agriambi.v18n09p934-938