Residual effect of soluble phosphorus fertilizers on pasture recovery (Brachiaria brizantha cv. Marandu) in sandy soil

[摘要] Two experiments were conducted during two years for evaluation of the soil/pasture system response to phosphorus fertilizers with different solubilization rates (ordinary superphosphate, triple superphosphate, and termalphosphate), with and without liming. The various phosphorus sources did not affect forage yield when fertilization was made during two years. Association of fertilizers may be advantageous since termalphosphate promoted the best forage yield when phosphorus fertilization was suppressed in the second year while fertilization with superphosphates resulted in best forage yield in the first year. Liming favored forage yield allowing higher nutrient concentration and reduction of aluminum in the soil. Response to fertilization was better in the second year because the pasture was under recovery.

[学科分类] 兽医学

[关键词] Cerrado soil;degradation;phosphorus;sources;termalphosphate   Introdução As pastagens;apesar de constituírem a base de exploração do sistema de produção de bovinos no Brasil;ocupam várias extensões de solos de cerrado;com reconhecidas limitações em fertilidade (Lopes;1984)