TEORES DE N, P e K NAS FOLHAS DE GRAVIOLEIRA ‘MORADA’ (Annona muricata L.) E PROPRIEDADES QUÍMICAS DO SOLO EM FUNÇÃO DA ADUBAÇÃO QUÍMICA E ORGÂNICA

Abstract

The soursop cultivation‟s expansion, faces some limitations at the agronomic order due to the lack of technical information about adubation and cultivation recommendations‟. This this experiment aims evaluating the leaf macronutrient content of soursop plants 'Morada' due to organic fertilization, with different types of manure and mineral fertilizer, as well as major changes in soil chemical properties. 56 plants with 42 months-old were selected. It was held an analysis of the initial soil and its acidity correction, before the application of the treatments that were composed by attestant (T1), mineral fertilization with NPK (T2), cattle manure (T3), poultry manure (T4), half of chemical fertilization + half of organic fertilization with goat manure (T5), hal of poultry manure and rock dust (T6), goat manure (T7). The experimental design was DBC, with seven treatments and four replications and each experimental unit was consisted of two plants. It was evaluated the nutritional status of plants from macronutrients‟ leaf analysis and soil samples at a depth of 0-20 cm of each treatment. Data were subjected to variance analysis, and the means were compared by Tukey test at 5% probability, besides the principal components analysis. The cattle manure showed the higher leaf content of P and K, potassium, sodium, carbon and soil organic matter, also resulted the smaller aluminum levels and aluminum plus hydrogen. The fertilization with poultry manure and poultry manure plus rock dust excelled when compared to mineral fertilizer with higher levels of phosphorus, calcium, magnesium and soil pH.