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 minigarden
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.