For being part of innumerable compounds and being directly related with the photosynthetic capacity of plants, Nitrogen (N) can significantly influence the production and rooting of cuttings. On the basis of this context, the work aimed to evaluate the effect of increasing doses of N in the productivity, capacity and speed of rooting mini-cuttings produced from mini-stumps of hybrid clones of Eucalyptus grandis x E. urophylla (I-224), beyond the quality of the formed changes. The present work was carried through in nursery seedlings of Eucalyptus, in a mini-garden of sand stream bed of FAEF, in Garça, São Paulo state. The used experimental delineation was complete randomized design with 4 replications, being the treatments consisted of 5 different doses of Nitrogen in nutritional solution (0; 80; 160; 240 and 320 mg L-1). The variables analyzed were: number of cuttings produced, the productivity index, rooting of cuttings produced and determination of the dry mass of seedlings. The dose of nitrogen applied in the mini-garden influenced the production of stakes, with a quadratic, reaching maximum production (13,1 stakes strain-1 month-1) with the estimated dose of 129 mg L-1.The percentage of rooting presented increasing linear behavior. The dose that provided the biggest index of productivity of the mini-garden was of 194 mg L-1. The dose of nitrogen applied in the mini-garden influenced the rooting significantly and the dry mass of formed seedlings.
Eucalyptus grandis x Eucalyptus urophylla; cloning; mini-garden with sand bed
