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Mineral uptake by tropical fruits

Samples from different parts of a fruit, and from several tropical fruits were collected, in order to study their mineral composition. The fruits studied were: Avocado (Persea americana 'Collinson'), pineapple (Ananas comosus 'Cayenne'), banana (Musa acuminata 'Nanicão'), Brazilian nut (Bertholettia excelsa HBK), guava (Psidium guajava 'IAC-4'), jack fruit with hard pulp (Artocarpus integrifolia L.), papaya. with yellow pulp (Carica papaya L.), mango (Mangifera indica 'Haden', 'Extrema' and 'Carlota'), "maracujá" (Passiflora edulis f. flavicarpa). For chemical analysis, these fruits were divided into the skin and nut, pulp and seeds when this differentiation was possible. The water percentage of these parts and their relative proportion to the entire fruit were calculated. All essential elements were determined in dry samples of the fruit parts, as well as cobalt, aluminium, and sodium. The mineral uptake was calculated per metric ton of fruit under normal conditions of harvest. In general, the nitrogen and potassium uptake were the greatest, whereas the molibdenum was the least one. The fruit that showed the greatest nutrient uptake was the Brazilian nut.


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