Produção de biomassa em diferentes materiais genéticos de Eucalyptus sp

Abstract

The study will be conducted in stands of Eucalyptus sp. with 5 years of age in the city of Dois Vizinhos, Paraná, in the area of Multiple Use Test of Eucalyptus at the Experimental Station of the Universidade Tecnológica Federal do Paraná - Campus Dois Vizinhos. Ten genetic materials are being studing, the species E. pellita , E. camaldulensis and E. propinqua, clones E. urophylla clone flowering, I- 224, GFMO27 and H-13, and hybrids E. saligna x E. botryoides, E. pellita x E. grandis and E. tereticornis x E. urophylla. The determination of the biomass, will be the 50 cutting trees, five for genetic materials, divided into five classes based on previous forest inventory. The cut trees will be separated into branches, leaves, wood and bark to obtain wet biomass in the forest and the withdrawal of subsamples. All trees will have their trunks strictly cubed. The trunks with bark, wooden discs will be removed with a thickness of 5 cm from the bottom, middle and top, which will be weighed separately. The subsamples of branches and leaves will be dried in an oven of forced air ventilation and weighed on the scale of precision. For dry biomass the fraction wood possesses 79.9% on average, followed for twig 12.6%, rind 11.8% and leaf 5.7% of the total. The production of dry biomass was estimated in 132,6 Mg/ha-1. The hybrid E. pellita x tereticornis that presented a production of total dry biomass of 215,0 Mg/ha-1, while clone E. urophylla clone blooming presented the lesser production of biomass with 62,86 Mg/ha-1. The silviculturais implications of the harvest of the forest planted in different intensities can represent an average loss of 39,5 Mg/ha-1.