1. 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

2. INTA :Experiment Station Concordia – Entre Ríos

3. 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

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

6. E grandis with irrigation: 6 months old -Argentina

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

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

9. Results by Properties

10. 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

11. 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

12. 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

13. 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

14. Shrinkage (tg. green to 0%) NS 19 17.0 13.4 11.0 grandis hybrid24 22 20 18 16 14 12 10 8 6
NS 19
17.0
13.4
11.0
grandis
hybrid
teretricornis

15. 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

16. 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

17. 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)

18. 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

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

21. Edge glue panels –grandis

22. E. tereticornis

23. grandis x tereticornis EGP : hardness test

24. Red euc floors

25. JARRAH - Australia

27. Red eucalypts

28. Thermal water swimming pool- Red euc- Uruguay

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