Nutritional status of seven coconut genotypes (Anão Amarelo de Gramame, Anão Amarelo da Malásia, Anão Vermelho de Gramame, Anão Verde do Jiqui, Gigante Brasileiro da Praia do Forte, Anão Amarelo de Gramame x Gigante do Oeste Africano, and Anão Vermelho de Gramame x Gigante Brasileiro da Praia do Forte) were assessed. Different aged leaves (leaf 4 and 9) and soil were sampled with the objective of investigating nutritional status of plants and changes on soil fertility. Samples from leaf 4 were more efficient to distinguish genotypes according to their nutritional conditions than leaf 9 samples. The most serious disorders were zinc, potassium, nitrogen and copper deficiencies. P, Ca, B, Fe and Mn leaf content seemed to be adequate in all genotypes. It was recommended to increase Zn application rate in order to improve nutritional status. The most outstanding effects of cropping on soil fertility were due to acidification in the fertilizer spreading area.
nitrogen; phosphorus; potassium; calcium; magnesium; boron; copper; iron; manganese; zinc; leaf analysis; soil analysis
