ABSTRACT
The aim of this study was to perform a silvicultural and economic analysis of clonal and seminal plantations of Tectona grandis in monoculture and in Taungya system with Zea mays, in the municipality of Figueirópolis D'Oeste, MT. The experiment was established in 2010 and consisted of a 2 x 2 factorial in a randomized block design with four replications. We evaluated the following variables: total height (H), diameter at 5 cm (DGH) and 1.3 m (DBH) above ground level, basal area, volume, survival, estimate and trend of growth of teak in the present and future ages and the production of maize silage. Analyses of total revenues and costs of implementation and maintenance of the system were performed. Clonal plants in monoculture and in Taungya system presented higher growth in total height, DGH and DBH in relation to seminal plants. In monoculture and in Taungya system, the production (m3 ha-1) of clonal plants in relation to seminal plants was 33 and 30% higher, respectively. The costs of inputs and planting activities of the teak were higher and the costs of maintenance were lower in Taungya system compared to monoculture, for both clonal and seminal plantations. In Taungya system with clonal plants, maize decreased by 21% the total establishment and maintenance costs compared to monoculture, and for seminal plants the reduction was 27%. Teak grows less in Taungya system, but shows signs of recovery after the removal of maize. The presence of maize amortizes costs of implementation and maintenance of teak in seminal and clonal plantations.
Keywords:
Teak; Agroforestry systems; Growth estimate
