FORM FACTOR FOR CLONE VM 58 (E. urophylla X E. Camaldulensis) AND HYBRID SEEDS (E. urophylla X E. grandis)

• DOI: 10.22533/at.ed.317222230012

• Palavras-chave: Modeling; Rigorous cubing; Volume.

• Keywords: Modeling; Rigorous cubing; Volume.

• Abstract:

  In the forest inventory systems it is essential to search for fast and accurate information on the volume of wood to be obtained. Aiming this, this work aims to model artificial form in forest stand with clone VM 58 (E. urophylla x E. camaldulensis) and hybrid seeds (E. urophylla x E. grandis) at seven and a half years old, in the southern region of the state of Tocantins. The database was obtained from a systematic and stratified forest inventory of a clone of VM 58 and hybrid seeds from the fixed plots of 27.5 x28 m (770 m²) totaling 42 plots (2,9% of sample intensity). Smalian cubed 32 trees (16 for VM 58) and 16 for seeds and seven models and Stepwise were tested. The Stepwise model was the one that performed best for the VM 58 clone, with R²aj. 0,69, Syx (%) 4,87 and CV (%) 8,85 where:  . and for hybrid seeds (E. urophylla x E. grandis) with R²aj. of 0,875, Syx (%) of 7,46 and CV (%) of 18,307 from the model:  . The artificial form factor tables ranged between 0,4066 and 0,5385 for clone VM 58 (E. urophylla x E. camaldulensis) and 0,4223 to 0,7780 hybrid seeds (E. urophylla) x E. grandis). The use of the selected models should be restricted to stands with similar characteristics to the one studied and under edaphoclimatic conditions and similar driving regimes.
   

• Número de páginas: 17