Grazing grasses in grazing soil Fersialitic Red Parduzco Ferromagnesial of a savanna ecosystem

Abstract

The behavior of 6 improved grasses that had shown good results under cutting on a low fertility Red Brown Ferromagnesial Fersialitic soil was studied. A completely randomized design was used with three repetitions consisting of 0.25 ha plots, which were grazed every 30 to 35 days in rain and 40 to 50 days in dry conditions with a load of 12 rams per hectare. The species were fertilized with 100; 80 and 100 kg / ha per year of N, P and K respectively, the fractionated nitrogen in the rainy season. Availability was measured by rotation and botanical composition at the beginning and end of the experiment. Andropogon gayanus cv. CIAT 621 achieved the highest availability of dry matter, followed by Brachiara decumbens cv. CIAT 606, which in the rainy season of the first year and in the dry season of the second and third does not differ significantly from anthropogon, while Brachiaria purpurascens cv. gouache showed the worst behavior in this indicator. The persistence of andropogon and Brachiaria 606 was superior (P <0.01) while the rest of the species decreased their population after three years of evaluation. It is recommended to extend to Andropogon gayanus cv. CIAT 621 and Brachiara decumbens cv. CIAT 606, given the edaphoclimatic conditions of the area.