The clonal propagation of Eucalyptus by mini-garden system is a technique already elucidated in the Brazilian forest sector. However, subtropical Eucalyptus species, such as Eucalyptus benthamii, are recalcitrant to adventitious rooting, which causes a reduction in the rooting rate of the mini-cuttings produced in this system.
The nutrition of mini-stumps is one of the most important factors in clonal mini-gardens, and affects the mini-cuttings production as well as their rooting. In this context, this work evaluated the influence of five mini-garden nutrient solutions in the production of shoots and rooting of mini-cuttings of two E. benthamii clones.

The treatment solutions had different concentrations of nitrogen (N), iron (Fe) and zinc (Zn). The reference solution was denominated T1, and the other treatments had the following differences: 45% of N reduction in T2 and T3 treatments, and 27% of N reduction in T4 and T5; Fe increase of 2.5x in T2 and T3 and of 1.9x in T4 and T5; Zn increase of 20x on T2 and T4, and of 40x on T3 and T5.

Different formulations of nutrient solutions influenced the rooting rates of the two clones at 1% statistical significance. Clone K1100 solutions T2 and T3 had the highest rooting rates and did not have differences between them. For clone K1101, only the T3 solution had the rooting rates higher than the other treatments. These findings make T3 solutions the most recommended for these clones, and potential ones for this specie.

06 - The influence of different nutrients solutions at Eucalyptus benthamii adventitious rooting