IUFRO 2007 D5 Conference - Taipei

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Presentation transcript:

IUFRO 2007 D5 Conference - Taipei Physical and mechanical properties of Eucalyptus grandis x E. tereticornis hybrid grown in Argentina Ing. Ftal. Martín Sánchez Acosta, et al. INTA (*) (*) INTA : National Agriculture & Livestock Reserach Institute Entre Ríos province - ARGENTINE

INTA :Experiment Station Concordia – Entre Ríos

Objetives : Main: Complementary: Determination of the wood´s properties of the “new promissory hybrid E. grandis x E tereticornis” , planted in Argentine Complementary: Comparisson with E. grandis & E. tereticornis - Basic information for genetic breeding

E grandis. 1.2 years old - 10 meters high.-

E grandis with irrigation: 6 months old -Argentina

Material : - Trees from genetic assays E. grandis x E tereticornis References E. grandis (Argentine) References E. tereticornis (Argentine) (Tinto, Labate, Hernitz) - Age : 10 years dbh : 34 cm heigth : 30 m IMA : 40 m3/ha/yr aprox.

Metod: Standars : ASTM (EEUU) – IRAM (ARG)

Results by Properties

Density (14% m.c) 850 690 490 18 n.s. grandis Hybrid tereticornis Kg/dm3 1000 900 850 800 700 690 18 n.s. 600 500 490 400 300 200 100 grandis Hybrid tereticornis

Static bending (Modulus of elasticity) 15 n.s. 22000 19500 11000 25000 20000 15000 10000 5000 22000 19500 15 n.s. 11000 grandis Kendall S. Africa

Janka Hardness (tg) 60 Ns 18 48 30 grandis hybrid teretricornis N 6500 6000 5500 5000 4500 4000 3500 3000 2500 2000 60 48 Ns 18 30 grandis hybrid teretricornis

Removal of nails (tg) ? NS 18 1100 707 grandis hybrid teretricornis N 1300 1200 1000 900 800 700 600 500 400 300 ? 1100 NS 18 707 grandis hybrid teretricornis

Shrinkage (tg. green to 0%) NS 19 17.0 13.4 11.0 grandis hybrid 24 22 20 18 16 14 12 10 8 6 NS 19 17.0 13.4 11.0 grandis hybrid teretricornis

T/R relationship 2.0 2.1 1.9 1.6 Ns : 97 CV: 14 % grandis hybrid 2.8 2.6 2.4 2.2 2.0 1.8 1.6 1.4 1.2 1.0 2.0 2.1 1.9 1.6 grandis hybrid teretricornis

compared with E. grandis Relative situation compared with E. grandis % 100 90 80 70 60 50 40 30 20 10 75 50 40 15 40 Density Hardness MOE Shrinkage T/R

Aptitude - Structural uses (construction - poles) - Structural uses (plank m., pallets – boxes) - Furnitures (semi-heavy weight) - Gral. carpentry - joinery - Flooring (better than grandis) - Laminated panels (plywood – LVL)

Conclussions: - The density is intermediate, close to teret. In general, the mechanical values are higher than grandis and lower than tereticornis - Better values of estability t/r shrinkage - The color is rose – red , intermediate between grandis & tereticornis The values are good for floors, and structural and general uses (furniture – houses, carpentry, etc) good relationship density/resistance

Acknowledgements - An especial gratefulness to the Symposium´s Organization commite by the finnancial assistance

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ELECTRONIC BULLETIN NOVEDADES FORESTALES INTA CONCORDIA FREE ... ELECTRONIC BULLETIN NOVEDADES FORESTALES INTA CONCORDIA In spanish ....... martinsa@concordia.com.ar www.inta.gov.ar/concordia

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