Una evaluación de alternativa de fertilización con fuentes de liberación controlada en el establecimiento de plantaciones comerciales de Eucalyptus grandis

The establishment of a commercial plantation of Eucalyptus grandis a year after being planted in a Tacuarembó site with the addition of controlled release fertilizers was evaluated. A total of 12 treatments and a control (unfertilized control) with three replications were applied to the plantation. The treatments are the result of the combination of the factors nutrient release period and applied doses, where for the period of release there are 4 levels: 3 months, 6 months, 9 months and 12 months, and for the doses 3 levels: 6, 12 and 18 grams per plant at the time of planting with Basacote Plus fertilizer (16, 8, 12 + micro). The stand density was 1250 plants per ha.

The survival, growth (divided into its components basal area, height and volume) and nutrient content (N, P, K, Ca, Mg and B) in the leaf were evaluated in this study. In this case, the differences were found mainly in survival where low release periods are related to higher mortality. No significant differences were found in height, volume and foliar nutrient content compared to the control. In the case of the basal area, an effect of the period was found only for the 6-month release period vs. the 12-month release period levels.

From the study, a trend was observed that, as the depth of the soil increased, higher values of the variables basal area, volume, and foliar nutrient content were evidenced.