First results of trace metals associated with silicon contents in two phenological stages of wheat (Triticum aestivum) in the southeast of the Pampean plains, Argentina.

FRAYSSINET CELIA; MARCOVECCHIO, JORGE; OSTERRIETH, MARGARITA; VILLAGRAN, DIANA; LA COLLA, NOELIA; FERNANDEZ SEVERINI, MELISA; BENVENUTO, MARIA LAURA; FERNÁNDEZ HONAINE, MARIANA; BORRELLI, NATALIA; HEILAND,P

bengaluru

Conferencia; 7th International Conference on Silicon in Agriculture; 2017

Silicon as a constituent of the solid and liquid fraction of the soil is an essential element in the relationship between plant-soil-environment. In addition, it plays an important role in the development of certain crops that are producers of silicophytoliths. Internationally, it has been reported that the biomineralizations of amorphous silica have the capacity to retain trace metals within their matrix, present at the time of their formation. This interaction of silicon with other toxic elements such as lead, cadmium, etc, has a direct influence on all members of the food chain including man and his quality of life. The level of degradation in the soils of the Pampas plain is high, related to the agricultural activity for more than 150 years; that´s why it is fundamental to deepen the study of biomineralizations as heavy metal retention agents, especially in the study area, where the application of agrochemicals is so intense. So the aim of this work is to evaluate the silicon and trace metals contents in plants, soils and solution of agricultural soils cultivated with wheat (Triticum aestivum) in southeastern Buenos Aires. Field tests were carried out with the application of two silicate fertilizers (one powder: Silfix and another liquid: Quicksol). Samples of surface soil and plant material were extracted in two phenological stages (vegetative and post - harvest). The available silicon contents and its contents in plant as well as the amounts of Cd, Cu, Pb, Zn, Mn, Ni, Cr and Fe in the soil solution, in the plant material and in the soil samples were determined using standard methodology. The contribution of Si to the soil solution would be similar for both types of applied fertilizers. The values of trace elements present in the soils are within those commonly registered for the zone and the values pertaining to the soil solution are all low (