Efecto de fertilización y cobertura de malezas en el crecimiento inicial y la mortalidad de una plantación de Nothofagus dombeyi en la Cordillera de Los Andes

摘要

Nothofagus dombeyi is one of the fastest growing Chilean native tree species, has an ample distribution range and adapts well to a great variety of site conditions. In this study the objective was to evaluate the effect of fertilization and weeds in the initial development of a N. dombeyi plantation. The plantation was established at 620 m in the Andes of Valdivia, in a marginal site condition for many other native and exotic species, with 1-0 plants grown in containers in the city of Valdivia. A random block design with three replications per fertilizer treatment was used, which included four fertilizer doses (0, 55, 110 y 160 g plant-1) and three levels of weed cover (≤ 35%, > 35 y ≤ 70% y > 70%), and was evaluated through two-way Analyses of Variance. We concluded that plants had a better response with the intermediate fertilizer dosis, that weed cover did not significantly affect growth or mortality of the plants, and that there was a significant interaction of fertilizer doses and weed cover, since with low levels of weed cover there was a positive response of plants to increasing fertilizer, an effect that was not observed with high weed cover. Results suggest the usefulness of fertilizers and weed control at intermediate intensities