Impacto de la intensidad de laboreo sobre la producción de biomasa en plantaciones forestales próximas a cosecha

The trials evaluated in this study were located in the province of Rio Negro (Uruguay) at the Santa Elena premises, a estate of the UPM Forestal Oriental company. The main objective of this study is to determine the relationship between tillage intensity and productivity of E. grandis in age close to harvest. In April of 2011, two identical trials in terms of treatment were put in place: one on soil classified as Bromosol (E1) and another trial on a Litosol (E2). The treatments were: cultivation in “compartments” (P), tillage in rows with disc-harrow and ridges (E) and tillage in rows with subsoiler, light disk-harrow and ridges (E + S). The results obtained in E1 suggest that at the age of 8 years and 4 months from the date of cultivation there exists significative differences in growth in favor of the tillage in treatment E when compared to the rest of treatments. Upon treatment E, productivity increased by 40,3% compared to P (measured in m3/ha of wood with bark); and productivity increased by 18,2% comparing treatment E with E+S. In E2, at age 9 years and 3 months post-cultivation, there does not exist differences between treatments based on the analyzed variables.