Yield performance of soybean and corn subjected to magnesium foliar spray

Yield performance of soybean and corn subjected to magnesium foliar spray

The objective of this work was to evaluate the effect of magnesium foliar spray on yield performance of soybean (Glycine max) and corn (Zea mays) cultivated in soil with adequate levels of base saturation and magnesium content in Brazil. The field trials were conducted on a Typic Hapludox cultivated...

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Published in:Pesquisa agropecuaria brasileira Vol. 52; no. 12; pp. 1185 - 1191
Main Authors: Altarugio, Lucas Miguel, Loman, Marcos Harm, Nirschl, Matheus Gomes, Silvano, Rafael Gil, Zavaschi, Eduardo, Carneiro, Leandro de Mello e Silva, Vitti, Godofredo Cesar, Luz, Pedro Henrique de Cerqueira, Otto, Rafael
Format: Journal Article
Language:English
Published: Embrapa Secretaria de Pesquisa e Desenvolvimento; Pesquisa Agropecuária Brasileira 01-12-2017
Embrapa Informação Tecnológica
Subjects:
AGRICULTURE, DAIRY & ANIMAL SCIENCE
AGRICULTURE, MULTIDISCIPLINARY
foliar fertilization
Glycine max
magnesium sulfate
Zea mays
Zea mays
foliar fertilization
Glycine max
sulfato de magnésio
magnesium sulfate
adubação foliar
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Summary:The objective of this work was to evaluate the effect of magnesium foliar spray on yield performance of soybean (Glycine max) and corn (Zea mays) cultivated in soil with adequate levels of base saturation and magnesium content in Brazil. The field trials were conducted on a Typic Hapludox cultivated with soybean and corn in the 2013/2014 and 2014/2015 crop seasons, respectively. Treatments consisted of Mg rates (50, 100, 250, 500, 1,000 and 1,500 g ha-1 and a control without Mg) applied during the V4, R1, and R5.1 (soybean) or V4 and R2 (corn) phenological growth stages as magnesium sulfate heptahydrate (MgSO4∙7H2O). The SPAD index, leaf Mg content, grain yield, and 100-grain weight were evaluated. The Mg foliar spray increased the SPAD index in soybean and the leaf Mg content in corn. The Mg rates of 540 and 890 g ha-1 increased in 325 and 737 kg ha-1 the yield performance of soybean and corn, respectively, regardless of the phenological growth stages. The Mg application during the reproductive stages increased in 2% the 100-grain weight for both crops. Foliar spraying of Mg improves the yield performance in soybean and corn crops. Resumo: O objetivo deste trabalho foi avaliar o efeito da aplicação foliar de magnésio no desempenho produtivo de soja (Glycine max) e milho (Zea mays) em solo com níveis adequados de saturação por base e conteúdo de magnésio, no Brasil. Os experimentos foram desenvolvidos em Latossolo Vermelho-Amarelo distrófico cultivado com soja e milho nas safras 2013/14 e 2014/15, respectivamente. Os tratamentos consistiram de aplicação foliar de doses de Mg (50, 100, 250, 500, 1.000 e 1.500 g ha-1 e controle sem Mg) nos estádios fenológicos V4, R1 e R5.1 (soja) ou V4 e R2 (milho), na forma de sulfato de magnésio heptahidratado (MgSO4∙7H2O). Avaliaram-se o índice SPAD, teor foliar de Mg, produtividade de grãos e massa de 100 grãos. A aplicação foliar de Mg aumentou o índice SPAD na cultura da soja e o teor foliar de Mg na cultura do milho. As doses de Mg de 540 e 890 g ha-1 proporcionaram incrementos de 325 e 737 kg ha-1 na produtividade da soja e do milho, respectivamente, independentemente do estádio fenológico. A aplicação foliar de Mg no estádio reprodutivo aumentou em 2% a massa de 100 grãos de ambas culturas. A pulverização foliar de Mg melhora os parâmetros produtivos das culturas de soja e milho.
ISSN:0100-204X
1678-3921
1678-3921
DOI:10.1590/s0100-204x2017001200007