The pear tree response to phosphorus and potassium fertilization.

摘要: The aim of this study was to evaluate the response phosphorus (P) and potassium (K) fertilization establish critical levels P K in soil plant tissue pear trees. Two experiments were conducted Sao Joaquim (SC), Brazil. In experiment 1, plants received annually application increasing rates phosphate fertilizer (0, 40, 80, 120 160 kg P2O5 ha-1), while 2, K2O ha-1) applied annually. two experiments, collected from 0-10, 10-20 0-20 cm layers, available (experiment 1) exchangeable 2) content analyzed. Whole leaves annually, which subjected analysis total content. number weight fruits per fruit yield evaluated. Application on planted with trees increased nutrient and, most crop seasons, whole leaf, but it did not affect components yield. leaf decreased season greater affected by fertilization.