Soil pollution is a major environmental problem and also makes food production impossible, since 95% of food produced worldwide originates in the soil. There are numerous practices that when improperly made can cause soil contamination, in agriculture the inadequate use of fertilizers and agrochemicals can cause soil contamination by toxic elements. Silicon is already present in the soil in a natural way, but in recent years research is being developed using silicon-based residues to increase plants resistance to pests and diseases, such as soil corrective and for increased productivity, the results are satisfactory. Many published studies show the benefits of silicon in reducing plants stress, but there is still little information about silicon as a remediator of toxic elements in the soil, so the objective of this work was to search for already published works on this theme. Studies were found using different silicon sources and the application occurred in soils contaminated mainly with Zn, Cd, Cu and Pb.

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The bene ts of applying silicon to plants under stressful conditions are recognized. However, few studies have shown the effect of supply and form of application of silicon on the nutrition of plants grown under ideal conditions. This study aimed to verify the effects of different methods of silicon application on the nutrient uptake of maize in two tropical soils. MethodsSilicon was supplied in three application methods (in the planting furrow, in the total pot area, and spraying) at two rates in maize plants in two tropical soil types. Thirty days after emergence, the contents of macronutrients, micronutrients, and silicon were evaluated. ResultsIn sandy soil, potassium silicate application contributed to an increase in N, P, K, Mg, Si, and Cu contents, whereas in clay soil, there was an increase in the plant contents of P, K, Ca, Mg, S, Cu, Si, and Mg. ConclusionIt was concluded that silicon application contributed to greater nutrient uptake in maize plants. Our study suggests that silicon application could be an important tool for increasing mineral fertilization in tropical soil conditions.

Purpose The benefits of applying silicon to plants under stressful conditions are recognized. However, few studies have shown the effect of supply and form of application of silicon on the nutrition of plants grown under ideal conditions. This study aimed to verify the effects of different methods of silicon application on the nutrient uptake of maize in two tropical soils.Methods Silicon was supplied in three application methods (in the planting furrow, in the total pot area, and spraying) at two rates in maize plants in two tropical soil types. Thirty days after emergence, the contents of macronutrients, micronutrients, and silicon were evaluated.Results In sandy soil, potassium silicate application contributed to an increase in N, P, K, Mg, Si, and Cu contents, whereas in clay soil, there was an increase in the plant contents of P, K, Ca, Mg, S, Cu, Si, and Mg.Conclusion It was concluded that silicon application contributed to greater nutrient uptake in maize plants. Our study suggests that silicon application could be an important tool for increasing mineral fertilization in tropical soil conditions.