Fertilidade do solo, teores foliares de nutrientes e crescimento vegetativo de cafeeiros em função de fontes de fósforo

Abstract

Phosphorus is one of the nutrients applied in greater quantity during the coffee implantation phase. The objective of this research was to evaluate soil fertility, leaf nutrient contents and vegetative growth of coffee plants as a function of phosphorus sources applied in the culture implantation. The experiment was conducted in November 2018 at Fazenda Atalho, Monte Carmelo-MG, with the cultivar Mundo Novo at a spacing of 3.80 m between rows and 0.7 m between plants, using drip irrigation. The experimental design used was in randomized blocks, with six blocks and eight treatments with application of 200 kg ha-1 of P2O5: Commercial Source T (28% of P2O5), Organomineral L (16% of P2O5), Monoammonium Phosphate (MAP – 54% P2O5), Single Superphosphate (17% P2O5), Reactive Natural Phosphate (29% P2O5), Organomineral X (18% P2O5), Commercial Source P (27% P2O5) and Magnesium Thermophosphate (17.5% P2O5). Phosphate fertilizer sources did not influence coffee plant vegetative parameters and soil fertility. The highest foliar phosphorus contents were detected with the sources Magnesium Thermophosphate, Monoammonium Phosphate, Simple Superphosphate and Commercial Sources T and P. For the other nutrients, there were no differences in the contents as a function of the tested fertilizer sources.