Calcium and Magnesium availability and ratio: Effect on exports and concentration in ryegrass and soybean
Ca and Mg are involved in plant growth according to their availability, and possibly their relationship. The soils of the Pampean Region have been considered well endowed with these elements, although they diagnosed areas with low contents. The objective of this work was to evaluate different concentrations of Ca in nutrient solution on the production of dry matter (DM), Ca and Mg content in DM, and its annual export in annual ryegrass (Lolium multiflorum L.) and forage soybean (Glycine max [L.] Merr). Additionally, the effect of doubling the concentration at the same Ca/Mg ratio was evaluated. A test was carried out with nutrient solutions of 1, 5, 9 and 12 mM Ca and 2 mM Mg. A treatment with 10 mM Ca and 4 mM Mg was added. Three cuts were made in ryegrass and one in soybeans. In ryegrass, it was determined that the levels of calcium nutrition influence the concentrations and export of Ca and Mg in MS, without effects on the production of DM. The Ca/Mg ratio was occasionally related to the concentration of Ca and Mg in MS and in the export of Ca and Mg. In soybean, calcium nutrition levels influence the production of DM, concentrations of Ca in DM and the export of Ca and Mg, while they do not intervene in the concentration of Mg in DM. The Ca/Mg ratio in solution occasionally had an effect on the concentration of Ca in MS and on the export of Ca and Mg.
| Main Authors: | , , , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Facultad de Ciencias Agrarias y Forestales de la Universidad Nacional de La Plata
2020
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| Online Access: | https://revistas.unlp.edu.ar/revagro/article/view/10925 |
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| Summary: | Ca and Mg are involved in plant growth according to their availability, and possibly their relationship. The soils of the Pampean Region have been considered well endowed with these elements, although they diagnosed areas with low contents. The objective of this work was to evaluate different concentrations of Ca in nutrient solution on the production of dry matter (DM), Ca and Mg content in DM, and its annual export in annual ryegrass (Lolium multiflorum L.) and forage soybean (Glycine max [L.] Merr). Additionally, the effect of doubling the concentration at the same Ca/Mg ratio was evaluated. A test was carried out with nutrient solutions of 1, 5, 9 and 12 mM Ca and 2 mM Mg. A treatment with 10 mM Ca and 4 mM Mg was added. Three cuts were made in ryegrass and one in soybeans. In ryegrass, it was determined that the levels of calcium nutrition influence the concentrations and export of Ca and Mg in MS, without effects on the production of DM. The Ca/Mg ratio was occasionally related to the concentration of Ca and Mg in MS and in the export of Ca and Mg. In soybean, calcium nutrition levels influence the production of DM, concentrations of Ca in DM and the export of Ca and Mg, while they do not intervene in the concentration of Mg in DM. The Ca/Mg ratio in solution occasionally had an effect on the concentration of Ca in MS and on the export of Ca and Mg. |
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