Abstract

HURTADO GUERRERO, Yober Heli et al. Effect of phosphorus and nitrogen fertilizers on the growth of “rainbow eucalyptus” Eucalyptus deglupta Blume (Myrtaceae). Arnaldoa [online]. 2023, vol.30, n.2, pp.169-192.  Epub July 30, 2023. ISSN 1815-8242.  http://dx.doi.org/10.22497/arnaldoa.302.30206.

Inadequate fertilization affects the production of quality seedlings, because they need a balanced balance of essential nutrients, in the concentrations required to grow properly. With the above, it was proposed to determine the effect produced by fertilizers calcium triple superphosphate, ammonium nitrate and potassium nitrate fertilizers on the variables number of leaves, plant height, plant diameter, root length and root biomass wet seedlings of Eucalyptus deglupta Blume (Myrtaceae). For this, three nutritional schemes were established of N, P, K and Ca (190-35-210-150 ppm) T1; (150-50-250-180ppm) T2; (140-55-300-200 ppm) T3 and a control without T4 solution. After 60 days, the concentrations of N, P, K and Ca (190-35-210-150 ppm) determined greater growth in the number of leaves (22,3 leaves); plant height (157,26 mm); plant diameter (2,41 mm) and wet root biomass (6,6 g). However, the observations indicate that for the root length variable, the treatments supplied with concentrations of N, P, K and Ca, did not show significant differences in their means.

Keywords : Nutrient Solutions; fertilization; macronutrients; stock solution; nutrient concentration.

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