Water Flow Evaluation in <i>Eucalyptus</i> and <i>Corymbia</i> Short Logs

Monteiro, Thiago; Lima, José; Silva, José; Zanuncio, Antonio José; Baraúna, Edy

doi:10.1590/2179-8087.065917

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Original Article, Wood Science and Technology • Floresta Ambient. 25 (2) • 2018 • https://doi.org/10.1590/2179-8087.065917 copy

Water Flow Evaluation in Eucalyptus and Corymbia Short Logs

Authorship SCIMAGO INSTITUTIONS RANKINGS

ABSTRACT

The aim of this study is to evaluate the free and adsorbed water flow in short logs of Eucalyptus urophylla and Corymbia citriodora clones. 40 cm long, short logs were extracted from the base of the trees. Three trees each of C. citriodora and E. urophylla (A and B clones) were used. 27 logs were debarked and dried to achieve stabilization of mass. Free water (FWFR), adsorbed water (AWFR) and total water (TWFR) flow rates, and basic density were calculated. FWFR was greater than TWFR, which was superior to AWFR. The B clone wood showed a higher FWFR value and a lower AWFR value when compared to the other materials. On the other hand, the A clone wood showed a higher TWFR than the other materials. The TWFR was inversely proportional to density.

Keywords:
drying; free water; adsorbed water; moisture; basic density

Species	Symbol	^{^#} # - number; trees	^{^} DBH - diameter 1.3 meters from the ground, without bark. DBH (cm)	Tree height (m)
Eucalyptus urophylla	A	3	20.34	30.45
E. urophylla	B	3	19.45	29.45
Corymbia citriodora	C. citriodora	3	17.88	22.65

Genetic material	Basic density (g.cm-3)	Moisture Content (%)		Time (hours)
C. citriodora	0.610 A	IM	70.3 C	FWT	1327 B
		FPS	30.7 A	AWT	2239 B
		EMC	14.8 A	TWT	3566 A
A Clone (E. urophylla)	0.498 B	IM	102.2 A	FWT	1771 A
		FPS	30.7 A	AWT	1908 C
		EMC	14.6 A	TWT	3679 A
B Clone (E. urophylla)	0.523 B	IM	88 B	FWT	1123 B
		FSP	32.4 A	AWT	2537 A
		EMC	14.9 A	TWT	3660 A

Species	Water flow	Estimated model	R2
A clone	Total	M = -2.0661T + 92.059	0.96
	Free	M = -2.6829T + 99.609	0.99
	Adsorbed	M = -0.0077T + 28.461	0.95
Corymbia citriodora	Total	M = -1.2756T + 63.464	0.96
	Free	M = -1.6984T + 68.385	0.97
	Adsorbed	M = -0.0062T + 28.524	0.95
B clone	Total	M = -1.5612T + 70.256	0.87
	Free	M = -2.7181T + 83.038	0.95
	Adsorbed	M = -0.0048T + 25.525	0.87

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[1] *Thiago MonteiroSetor de Ciências Agrárias, Departamento de Engenharia e Tecnologia Florestal, Universidade Federal do Paraná – UFPR, Av. Pref. Lothario Meissner, 632, CEP 80210-170, Curitiba, PR, Brasil e-mail: thiago.monteiro@ufpr.br