Agronomic Efficiency of Biotite in Soybean and Corn Silage Production

The aim of the present study is to assess agronomic efficiency and potential using biotite, a remineralizer, as nutrient source both soybean (Glycine max (L.) Merrill maize silage (Zea mays L.). These crops were grown in succession different soils. research was conducted due importance adopting alternative sources fertilizers for agriculture relevance ground silicate rock powders maximize plant growth. purpose also register this product Ministry Agriculture, Livestock Supply (MAPA) soil remineralizer. Biotite (BE), powder used provided by Embu Mineral Company, Mogi das Cruzes, São Paulo State, Brazil. BE samples particle size, mineralogical geochemical analysis order its classification remineralizers based on Normative Instruction N. 5/2006, MAPA. Two experiments, one with each crop, sandy loam texture Yellow Latosol (LA) clay Red (LV) soil. experiments zed block design four replicates. Treatments consisted, witness, biotite (BE) remineralizer at increasing K2O rates (30, 60, 120 240 kg ha-1), KCl 60 ha-1, FMX (fine-graded mica schist from Pedreira Araguaia Company). Both reference sources. Yield data have shown K release absorption test plants resulted yield increases. behavior similar that some cases, KCl. has great be potassium crops.