Doses and critical phosphorus level for yerba mate (Ilex paraguariensis St. Hil.) clones

ABSTRACT: In Brazil, the optimal dose of phosphorus in cultivation yerba mate (Ilex paraguariensis St. Hil.) clones has yet to be defined. This study verified productivity response application P doses and determined critical level nutrient soil leaves. The experiment was developed Itaiópolis-SC, humic cambisol, from 2013 2020. Five were evaluated two (BRS-BLD Aupaba F2) mate. Fertility defined by planting/post-planting (0, 2.3; 4.5; 6.8, 9.0 g plant-1), canopy formation 1 10, 20, 30, 40, 50 2 15, 45, 60 production 16.7; 33.3; 50.0; 66.7 kg ha-1). Harvests took place between July 2015 January 2020, at 18-month intervals. leaves, fine branches, thick branches evaluated. 2020 harvest, leaf samples collected determine P. clone components increased with phosphate fertilization all harvests. levels for clones, F2, 5.2 6.3 mg dm-3 1.03 1.11 kg-1 respectively. Yerba is demanding P, expressing maximum planting phase, 2, when 5, 25, 40 plant-1, 35 ha-1 P2O5 are applied,