Adubação foliar com silício na cultura do milho
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Data
2011-04-01
Autores
Freitas, Lucas Barbosa de [UNESP]
Coelho, Elson Martins
Maia, Suelen Cristina Mendonça [UNESP]
Silva, Tiago Roque Benetoli
Título da Revista
ISSN da Revista
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Editor
Universidade Federal de Viçosa (UFV)
Resumo
Inúmeros trabalhos têm demonstrado o efeito benéfico da adubação com silício sobre o acréscimo da produção de diversas culturas, como, por exemplo, arroz, cana-de-açúcar e batata. No entanto, são escassas as informações sobre os benefícios nutricionais do silício para a cultura do milho. Desta maneira, objetivou-se, neste estudo, avaliar o efeito de doses e épocas de aplicação de silício, via foliar, nas características agronômicas e na produtividade do milho, cultivado no ano agrícola 2007/2008. O delineamento experimental adotado foi o de blocos casualizados, em esquema fatorial (4 x 3) + 1, com quatro repetições, envolvendo doses de silício (130, 260, 390 e 520 g ha-1 de Si) aplicadas via foliar, épocas de aplicação (2, 5 e 8 folhas expandidas) e uma testemunha (sem aplicação de Si). As variáveis analisadas foram altura das plantas e a inserção da primeira espiga, diâmetro de colmo, índice de clorofila foliar, teor foliar de silício, número de grãos por espiga, massa de 100 grãos e produtividade de grãos. O silício aplicado via foliar influenciou somente o teor foliar de Si.
Numerous studies have shown the beneficial effect of silicon on the increased production of several crops, such as sugar cane, rice and potato. However, there is little information about the nutritional benefits of silicon to the maize crop. Thus, the aim of this study was to evaluate the effect of doses and timing of leaf application of silicon on the agronomic characteristics and grain yield of corn grown in the agricultural year 2007/2008. The experimental design was randomized blocks in factorial scheme (4 x 3) + 1, with four replications involving doses of silicon (130, 260, 390 and 520 g ha-1) by foliar application, time of application (2, 5 and 8 expanded leaves) and a control (without silicon application). The studied variables included: plant height, height of first ear, stem diameter, leaf chlorophyll content, leaf silicon content, number of grains per ear, weight of 100 grains and grain yield. Silicon supplemented via foliar application influenced only the variable leaf silicon content.
Numerous studies have shown the beneficial effect of silicon on the increased production of several crops, such as sugar cane, rice and potato. However, there is little information about the nutritional benefits of silicon to the maize crop. Thus, the aim of this study was to evaluate the effect of doses and timing of leaf application of silicon on the agronomic characteristics and grain yield of corn grown in the agricultural year 2007/2008. The experimental design was randomized blocks in factorial scheme (4 x 3) + 1, with four replications involving doses of silicon (130, 260, 390 and 520 g ha-1) by foliar application, time of application (2, 5 and 8 expanded leaves) and a control (without silicon application). The studied variables included: plant height, height of first ear, stem diameter, leaf chlorophyll content, leaf silicon content, number of grains per ear, weight of 100 grains and grain yield. Silicon supplemented via foliar application influenced only the variable leaf silicon content.
Descrição
Palavras-chave
doses, épocas de aplicação e teor foliar, Doses, time of application and nutrient leaf content
Como citar
Revista Ceres. Universidade Federal de Viçosa (UFV), v. 58, n. 2, p. 262-267, 2011.