Response of grass Mombasa under the effect of sources and doses of phosphorus in the fertilization formation

It is characteristic of the Cerrado low phosphorus availability, requiring the inclusion of phosphorus in fertilizers to obtain satisfactory productivity of pastures. This study aimed to evaluate the effect of doses and sources of phosphorus fertilizers on grass establishing fertilization Panicum maximum cv. Mombasa. The experiment was conducted at the Federal University of Tocantins - Gurupi Campus. The experimental design was a randomized block in a factorial 4 x 6. The first factor consists of four phosphate fertilizer: UFT Fertile, Natural phosphate, Basifos and Simple superphosphate. The second consists of six doses of phosphorus (0; 35; 70; 140, 210 and 280 kg ha-1 P2O5). The fertilization with different sources and phosphorus levels influenced significantly the forage production Panicum maximum cv. Mombasa, increasing grass height, number of tillers, green mass, dry weight of shoot and Falker chlorophyll index. The largest production of Mombasa grass was in doses of 280, 215, 239 and 207 kg ha-1 P2O5 for sources UFT Fertile, Natural phosphate, Basifos and Simple superphosphate respectively. The Basifos fertilizer provided the highest yield of forage.