Physical and mechanical properties of Eucalyptus grandis x E. tereticornis hybrid grown in Argentina

Physical and mechanical properties of Eucalyptus grandis x E. tereticornis hybrid grown in Argentina

(*) INTA : National Agriculture & Livestock Reserach Institute

Entre Ríos province - ARGENTINE

(*) INTA : National Agriculture & Livestock Reserach Institute

Entre Ríos province - ARGENTINE

Ing. Ftal. Martín Sánchez Acosta, et al. INTA (*)Ing. Ftal. Martín Sánchez Acosta, et al. INTA (*)

IUFRO 2007 D5 Conference - TaipeiIUFRO 2007 D5 Conference - Taipei

INTA :Experiment Station INTA :Experiment Station Concordia – Entre RíosConcordia – Entre Ríos

ConcordiaConcordiaConcordiaConcordia

Entre RíosEntre Ríos

Objetives :

Main:

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

Objetives :

Main:

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.

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

Results by Properties Results by Properties

Density (14% m.c) Density (14% m.c)

grandis Hybrid tereticornis

Kg/dm3

1000

900

800

700

600

500

400

300

200

100

490690

850

18 n.s. 18 n.s.

Static bending(Modulus of elasticity) Static bending(Modulus of elasticity)

Kendall S. Africa

N

25000

20000

15000

10000

5000

11000

1950022000

15 n.s.15 n.s.

grandis

Janka Hardness (tg) Janka Hardness (tg)

grandis hybrid teretricornis

N

6500

6000

5500

5000

4500

4000

3500

3000

2500

200030

4860

Ns 18Ns 18

Removal of nails (tg) Removal of nails (tg)

grandis hybrid teretricornis

N

1300

1200

1000

900

800

700

600

500

400

300

707

1100 ?

NS 18NS 18

Shrinkage (tg. green to 0%) Shrinkage (tg. green to 0%)

grandis hybrid teretricornis

%

24

22

20

18

16

14

12

10

8

6

17.0

11.0 13.4

NS 19NS 19

T/R relationship T/R relationship

grandis hybrid teretricornis

Ns : 97CV: 14 %Ns : 97CV: 14 %

T/R

2.8

2.6

2.4

2.2

2.0

1.8

1.6

1.4

1.2

1.0

1.91.6

2.1

2.02.0

Relative situation compared with E. grandis

Relative situation compared with E. grandis

Density Hardness MOE

%

100

90

80

70

60

50

40

30

20

1040

Shrinkage T/R

50

75

15 40

Aptitude Aptitude

- Structural uses (construction - poles) - Structural uses (construction - poles)

- Structural uses (plank m., pallets – boxes)- Structural uses (plank m., pallets – boxes)

- Furnitures (semi-heavy weight)- Furnitures (semi-heavy weight)

- Gral. carpentry - joinery- Gral. carpentry - joinery

- Flooring (better than grandis)- Flooring (better than grandis)

- Laminated panels (plywood – LVL)- 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

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

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

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

Acknowledgements

Edge glue panels –grandis

E. tereticornis

grandis x tereticornis EGP : hardness test

Red euc floors

JARRAH - Australia

Red eucalypts

Thermal water swimming pool- Red euc- Uruguay

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