Altura de perfilho e rendimento de matéria seca de capim-tanzânia em função de diferentes doses de superfosfato simples e sulfato de amônio

Abstract

The experiment consisted in the application of different doses of simple superphosphate (SS) and ammonium sulfate (AS) in plots of Tanzania grass (Panicum maximum Jacq. cv. Tanzania 1), in its third growing season. The experimental design was completely randomized block, with four replications in a factorial scheme 4 ’ 3, being four doses of simple superphosphate (0, 50, 100, and 150 kg/ha of P2O5) and three doses of ammonium sulfate (0, 100, and 200 kg/ha of N). Three cuts were made at 0.1 m above the soil surface during the growing season. Before each cut the tiller height was measured. After the cut, the green forage of each plot was weighed and a sample of about 400 g was taken and used to evaluate the dry matter (DM) concentration and to calculate the estimated DM production per ha. The interaction SS ’ AS provided positive results, increasing tiller height at the first and third cuts and the yield of DM production at the three cuts.