Disponibilidad y relación de calcio y magnesio

BARTOLI, C.G.; MILLAN, G.J.; FERRO, D.A.; FANELLO, D.D.; SORACCO, C.G.; LOZANO, L.A.; LARRIEU, L.

Revista de la Facultad de Agronomía

https://revistas.unlp.edu.ar/revagro

Lugar: La Plata; Año: 2020 vol. 119

0041-8676

Ca and Mg are involved in plant growth according to their availability, and possibly their relationship. The soils of thePampean Region have been considered well endowed with these elements, although they diagnosed areas withlow contents. The objective of this work was to evaluate different concentrations of Ca in nutrient solution on theproduction of dry matter (DM), Ca and Mg content in DM, and its annual export in annual ryegrass (Lolium multiflorumL.) and forage soybean (Glycine max [L.] Merr). Additionally, the effect of doubling the concentration at the sameCa/Mg ratio was evaluated. A test was carried out with nutrient solutions of 1, 5, 9 and 12 mM Ca and 2 mM Mg. Atreatment with 10 mM Ca and 4 mM Mg was added. Three cuts were made in ryegrass and one in soybeans. Inryegrass, it was determined that the levels of calcium nutrition influence the concentrations and export of Ca andMg in MS, without effects on the production of DM. The Ca/Mg ratio was occasionally related to the concentrationof Ca and Mg in MS and in the export of Ca and Mg. In soybean, calcium nutrition levels influence the production ofDM, concentrations of Ca in DM and the export of Ca and Mg, while they do not intervene in the concentration ofMg in DM. The Ca/Mg ratio in solution occasionally had an effect on the concentration of Ca in MS and on the exportof Ca and Mg.