Resposta da Brachiaria brizanta cv. Xaraés à calagem e adubação

Abstract

Brazil has the largest commercial herd of cattle in the world, and, most feed on pasture, which is the food source of lower cost. The use of tropical pastures is being increasingly common for ruminants. For high animal productivity, some practices are necessary to correct the soil acidity and fertilization of pastures, and the choice of forage grasses that have potential for production of forage with high nutritional value. Pastures are mostly in the country exclusively of grasses. So because of inadequate management and lack of replenishment of soil nutrients, some of these pastures is in the process of degradation or are already degraded. This work aimed to evaluate the response to liming and ertilization of Brachiaria brizantha cultivar Xaraés in the initial phase of its development. The experiment was carried out from October to December 2011, at the Federal University of Pampa (Unipampa) in the municipality of Itaqui West Frontier of the State of Rio Grande do Sul were evaluated following treatments: 1) control without fertilizing , 2) nitrogen, 3) phosphorus and potassium, 4) nitrogen, phosphorus and potassium 5) lime and nitrogen, 6) lime, phosphorus and potassium; 7) limestone, nitrogen, phosphorus and potassium. In all treatments was sown culture of Brachiaria brizantha cultivar Xaraés with pelleted seeds. The treatments that had the most significant responses were five treatment with natural soil, limestone and seven nitrogen and treatment with natural soil, limestone and NPK, due to the number of tillers, leaf number and length of the plants are superior to other treatments. The treatments were five seven the best due to the use of lime combined with nitrogen.