Content and extraction of several nutrients by mango fruits of Manila cultivar.
Guzmán-Estrada C., Mosqueda-Vázquez R., Alcalde-Blanco S., Martínez-Garza A.
Author Affiliation: INIFAP-CIRNO-CESSI, Apdo. Postal 85, C.P. 82000, Mazatlán, Sinaloa, Mexico.
: 465-470
Abstract : Soil nutrient levels and nutrient uptake during fruit growth and development were investigated in eleven 31-year-old mango cv. Manila trees in a grove at the Cotaxtla Experimental Station, Veracruz, Mexico. From 20 days after fruit set up to fruit maturity, 7 fruit samples were taken every 10 days. Chemical analysis of fruits and their components was made on a dry basis. Using the concentration values determined and total dry weight of each of the fruit component tissues, nutrient uptake was calculated. The water content at ripening was 80.7, 63.7, 79.0, 58.1 and 52.3% in the whole fruit, peel, flesh, stone and seed, respectively. Fruits had an absolute growth rate of 3.5 g/day, and fruit flesh contributed most to fresh (81.9%) and dry weight (68.5%). The growth patterns of each of the component fruit tissues followed single sigmoid curves. Fruit peel had the highest Mg, Fe and Mn, the flesh had the highest K, the stone had the highest Ca and the seed had the highest N, P, Cu and Zn contents. Fruit flesh showed the highest nutrient requirement, and the stone had the lowest nutrient requirement. The dynamics of nutrient content in all 4 fruit components differed from the uptake dynamics because of dilution and translocation. Up until fruit ripening, Manila fruits extracted 529.5, 348.6, 66.9, 47.8, 42.1, 1.5, 0.6, 0.4 and 0.1 mg of K, N, Ca, Mg, P, Fe, Zn, Cu and Mn, respectively. Nutrient demand was highest 30-50 days after fruit set, and this coincided with the highest fruit growth rates.