Resumen

RODRIGUEZ, Z  y  PIRE, R. Extracción de N, P, K, Ca y Mg por plantas de melón (Cucumis melo L.) híbrido Packstar bajo condiciones de Tarabana, estado. Lara. Rev. Fac. Agron. [online]. 2004, vol.21, n.2, pp.141-154. ISSN 0378-7818.

Lara State is one of the largest cantaloupe farmers in Venezuela, thus the importance of determining the crop nutrient removal in order to program rational fertilizer practices. Cantaloupe plants hybrid Packstar were grown in Tarabana, Lara State, Venezuela, and N by microkjeldahl method, P by colorimetric analysis using ammonium-vanadate, K by flame photometry, Ca and Mg using atomic absorption spectrophotometry removal were determined based on plant dry weight and nutrient concentrations. The experiment was conducted as a randomized complete design with seven replications and five-plant plots. During harvest time, highest level of K, Ca and Mg were found in petioles while the lowest was found in lamina, root and ripe fruits, respectively. Highest level of N and P were found in lamina and ripe fruits whereas the lowest was found in roots. Total extraction of macronutrients were 75 kg N, 7 kg P, 64 kg K, 62 kg Ca and 10 kg Mg per hectare when 28,440 kg of fruits were harvested.

Palabras clave : Cucumis melo L; Nutrition concentration.; Foliar diagnostic. Nutrition.