Effect of phosphorus and nitrogen fertilizers onthe growth of “rainbow eucalyptus” Eucalyptusdeglupta Blume (Myrtaceae)

Abstract

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.