Resumo

BARRAZA, Fernando Vicente. Absorption of N, P, K, Ca and Mg in cucumber ( Cucumis sativus L.) under a hydroponic system. rev.colomb.cienc.hortic. [online]. 2017, vol.11, n.2, pp.343-350. ISSN 2011-2173.  https://doi.org/10.17584/rcch.2017v11i2.7346.

In Mexico, cucumber is cultivated in greenhouses with a supply of nutriments using a hydroponic system with different nutrient solutions and variable concentrations. However, the absorption of nutrients for optimum growth and yield is not exactly known. Therefore, this research was conducted at the Universidad Autónoma Chapingo (Mexico) in order to quantify the amount of macro nutriments absorbed by the crops. Four concentrations of the universal Steiner nutriment solution (25, 75, 125 and 175%) in a complete randomized block design were used. The contents of N, P, K, Ca and Mg were measured in the whole plant dry matter; then, the absorption was calculated. Yield was also evaluated. It was found that the highest nutrient absorption occurred with the nutrient solution at 175% of concentration: N 13,055; P 5,730; K 15,143; Ca 37,281 and Mg 9,750 g/plant.

Palavras-chave : mineral nutrient uptake; vegetables; cucurbit; fertirrigation; greenhouse.

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