Extraction of Silicon By Calcium Chloride and Acetic Acid, in Limestone and Steelmaking Slag in the Production of Grass Tiftway 419.

Steelmaking Slag is the main source of silicates for crops. The silicate has the advantage of reducing soil acidity, faster than the limestone. Therefore, this study aims to evaluate the correlation between silicon extractors - acetic acid and calcium chloride - on the basis of dose applications of lime (Limestone and Steelmaking Slag). The experiment was conducted Lageado Farm, Faculty of Agricultural Sciences, in Botucatu / SP. The determination of ground silicon was conducted 174 DAT with  calcium chloride extractor 0.01 mol L-1, and acetic acid extractor 0.0025 mol L-1 according Korndörfer et al. The concentration of Si in the soil was determined by Berthelsen, and the data were statistically analyzed by Pearson. The results showed that the two extractors were efficient in the extraction of silicon, and the silicon content in the soil increased linearly at depths of 0-10cm and 10 to 20 cm regardless of extractor used. After result analyzing, it is conclude that the silicon no depend of the extractor, and the two extractors were efficient to silicon. The higher silicon content occurred with the application of Steelmaking Slag.