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Ciências Florestais • Rev. Caatinga 31 (3) • Jul-Sep 2018 • https://doi.org/10.1590/1983-21252018v31n324rc   copy

AGRONOMIC EFFICIENCY AND GROWTH OF EGGPLANT CROP UNDER DIFFERENT POTASSIUM AND NITROGEN DOSES1 1 Paper extracted from the dissertation of the first author.

EFICIÊNCIA AGRONÔMICA E CRESCIMENTO DA CULTURA DA BERINJELA SOB DIFERENTES DOSES DE POTÁSSIO E NITROGÊNIO

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

Fertilization is important for the optimization of plant growth and yield, which are necessary for agronomic activities. Soil fertilization should increase net earnings that depend on nutrient use efficiency. The aim of this study was to evaluate the agronomic efficiency of eggplant under different doses of potassium (K) and nitrogen (N). Four levels of K (0, 54, 108, and 216 kg ha-1) and four levels of N (0, 67, 134, and 268 kg ha-1) were applied weekly by fertigation. The highest plant and the largest stem diameter were found with 165-175 kg ha-1 of N. Leaf area was more influenced by N than by K. Isolated application of different K doses did not statistically influence height plant, stem diameter, or leaf dry matter. The agronomic efficiency of nitrogen is reduced with increasing levels of N and K.

Keywords:
Mineral nutrition; Fertigation; Protected environment; Solanum melongena L.

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