Yield performance of soybean and corn subjected to magnesium foliar spray

Abstract

-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 (MgSO 4 •7H 2 O). 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.

Inoculation of Maize Seeds With Azospirillum and Magnesium Through Foliar Application to Enhance Productive Performance

“…The absence of Mg responses in this study may be attributed to two different conditions, the time of foliar application and the doses used. In Altarugio et al (2017) studies, the positive results from the foliar fertilization with Mg were obtained at R 2 , and in turn at V 4 the responses were inconstant, in a similar way to the present study. When considering the dose used Altarugio et al, (2017) obtained as the highest dose used 1.5 kg ha -1 , being the productivity peaks at R 2 obtained with 0.0883 kg ha -1 , well below the 6 kg ha -1 (Jezek et al, 2015) used in this study.…”

“…The absence of results obtained for magnesium foliar fertilization may be attributed to the soil initial condition of Mg, since the soil contents for this nutrient were between 0,8 and 1 cmol c dm -3 which are considered elevated (SBCS, 2004). However, in research of Altarugio et al (2017), it is reported that even in soil with adequate levels of Mg, its foliar application increases the SPAD index and the maize production components when applied at V 4 and R 2 . Thus, as Mg is a component of the chlorophyll molecule, it was expected an increase in the SPAD index of fertilized plants, in the same way as it was evidenced in Teklic et al (2009) studies, where the foliar fertilization with Mg in soybean increased the SPAD index and, consequently, the chlorophyll values and the crop photosynthetic rates.…”

Mineral Biofortification of Vegetables as a Tool to Improve Human Diet

“…Therefore, the authors suggest using the Mg-100 dose, as it allowed to increase the Mg content of the bulbs (up to 1.4-fold, when compared to control), with a contextual increase in crop yield (up to 38%). There is evidence that fertilization of Mg via foliar spray can act to improve crop yield and quality [ 66 , 67 ]. The few studies on Mg biofortification show that both MgSO 4 ·7H 2 O and MgCl 2 are effective in enhancing the element content in vegetables.…”

Cunicultura E Maximização Da Renda Integrada Da Propriedade Rural

“…Segundo Altarugio et al (2017) a aplicação Mg via foliar é uma solução para diminuir a ocorrência de deficiência deste nutriente em culturas. Aplicação de nutrientes via foliar pode ser uma boa estratégia para aumentar a produtividade das culturas, sendo uma suplementação a adubação de base, pois gera uma resposta em um curto período de tempo.…”