Magnesium mobility in soils as a challenge for soil and plant analysis, magnesium fertilization and root uptake under adverse growth conditions

Abstract

Background Due to its unique chemistry magnesium (Mg) is subject to various cycling processes in agricultural ecosystems. This high mobility of Mg needs to be considered for crop nutrition in sustainable agricultural systems. The Mg mobility in soils and plants and its consequences for crop nutrition are understood, but recent findings in crop Mg uptake, translocation and physiology particularly under adverse growth conditions give new insights into the importance of Mg in crop production. Scope The aim of this review is to combine the knowledge on the origin and mobility of Mg in soils with the role of Mg in plant stress physiology and recent evidence on the principles of crop Mg uptake. The question is addressed whether the progress made in Mg research, particularly on the role of Mg in stress physiology, makes a revision of the development of Mg fertilization recommendations necessary. Conclusions New insights into Mg uptake and utilization but particularly into the role of Mg in increasing crop tolerance to various stresses indicate changes in the crop Mg demand under adverse growth conditions. Future work should incorporate these findings in optimization of site-specific balanced fertilization programs particularly under stress conditions.

Impact of magnesium fertilization on yield and nutrients uptake by maize grown on two different soils

“…Also, the level of available Mg was insufficient (Fageria 2001, Römheld & Kirkby, 2007and Gransee & Fuhrs, 2013.…”

“…These responses may be attributed to the initial level of available Mg in soil before sowing as shown in Table 1 that was moderate in clay loam soil and low in sandy soil, as well as, to imbalances between Mg and Ca and K as shown in soil characteristics which reflects on the soil supply ability of Mg and consequently on maize yield (Römheld & Kirkby, 2007, Gransee & Fuhrs, 2013and Ertiftik & Zengin, 2016.…”

“…Cation competition is a consequence of nutrient imbalances in soils. It is commonly known that the uptake of Mg is strongly influenced by the availability of other cations like NH 4 , Ca and K. Nutrient imbalances in the soil could be associated with fertilization practice (Fageria, 2001, Römheld & Kirkby, 2007and Gransee & Fuhrs, 2013. In this respect, Pathak & Kalra (1971) and Singh & B L Singh (1986) noted that the higher supply of K depressed the Mg uptake.…”

Changes in the Soil Magnesium and Sulphur Content after Kieserite Application into Haplic Luvisol and the Effect on Yields of Barley Biomass

“…The main advantage of soil tests is the possible prevention of potential disorders in the nutrient status of the crop before its cultivation in a given field (Matula, 2009;Mercik et al, 1983). To a certain degree the combination of soil and plant analysis and the use of calibration experiments on production sites admittedly allow the development of recommendations for Mg nutrition of crops (Gransee and Führs, 2013).…”

Residual De Nanoparticulado Na Correção Do Solo E NPK Na Cultura Do Café

“…Além disso, o N e K são os nutrientes com maior porcentagem de exportação para o grão, pela colheita do café, podendo assim ser translocados do tecido foliar rapidamente, visto que sua mobilidade na planta é alta. Outra consequência da diminuição do potássio na folha está ligada a forte interação entre os íons Mg +2 e K + considerada antagônicas, entretanto ainda não há um consenso entre os pesquisadores sobre esse mecanismo de interação, embora o fenômeno seja amplamente encontrado na literatura (GRANSEE;FUHRS, 2013;MAATHUIS;PODAR, 2012;TEIXEIRA, 2016 De uma maneira geral, com base nos resultados deste experimento pode-se observar que o parcelamento do corretivo líquido nanoparticulado apresentou rápido poder de reação, devido sua maior área especifica, sendo que o parcelamento das aplicações potencializou o efeito residual do nanoparticulado ao longo do ano na camada de 0-20 cm do solo. Segundo Quartezani et al (2015), há carência de estudos sobre aplicação de corretivos líquidos quanto a sua dosagem e parcelamento, podendo esta prática ser uma forma complementar a aplicação convencional na correção da acidez do solo, entretanto, como observados nesse experimento, o parcelamento em duas a três vezes foi capaz de exercer um efeito residual satisfatório para a cultura do café conilon ao longo de um ano, podendo substituir o método convencional.…”