Correctives and fertilizers use in pasture in amazon biome

The objective of this work was to evaluate the productivity of green and dry mass of shoots and roots and calcium and magnesium accumulation in Urochloa brizantha, by application of limestone, limestone and agricultural gypsum followed by fertilization with nitrogen (N), phosphorus (P) and potassium (K). The experimental design consisted of randomized blocks with four replicates and seven treatments: T0 = 0; T1 = 0.40; T2 = 0.80; T3 = 1.60; T4 = 3.20 t ha(-1) of limestone; T5 = 1.60 t ha(-1) of limestone plus NPK (40 kg ha(-1) of ammonium sulfate + 120 kg ha(-1) of P2O5 - single superphosphate and 20 kg ha(-1) of K2O - potassium chloride) and T6 = 1.50 t ha(-1) of agricultural gypsum plus NPK similar to previous treatment. During the period of experiment conduction, eight aerial part samples were evaluated, two calcium and magnesium contents evaluations in tissues and one root system evaluation. There was an effect for accumulation of green mass, dry mass and calcium and magnesium contents in tissue of plants aerial part at first sample, with emphasis on use of limestone and gypsum accompanied by NPK. The root accumulation in profile showed a linear effect on limestone rates evaluated.