DETERMINATION OF TANNIN PRODUCTION EQUATIONS OF ACACIA-NEGRA, Acacia mearnsii De Wild.
DOI:
https://doi.org/10.5902/19805098370Keywords:
yield, tannin, Acacia mearnsii., acácia-negra.Abstract
The present work was established with the objective to determine functions to estimate the production of tannin of Acacia-negra, Acacia mearnsii De Wild in kilograms per tree and hectare. Thus dendrometrical information was collected in 32 experimental plots, stratified by the age of 3.5 up to 8.5 years, on good and poor sites with different spacings. Tannin content was measured on the basis of 64 trees, 32 trees with medium diameter and 32 trees with dominant height. The results obtained allow the following conclusions: a) The production of tannin (PTA) in kilograms per tree can be estimated in function of diameter (d) in cm, height (h) and medium distance between the trees in meters after one of the following equations: ln PTA = - 6.0141145 + 2.43202867 . ln d + 1.0413106 . ln EM; ln PTA = - 5.853512 + 1.53029074 . ln d + 0.38185298 . ln (d²h) b) The production of tannin in kilograms per hectar (PT) can be expressed in dependance of basal area (G) in m2/ha and dominant height (ho) in meters, and estimated with the equation: ln PT = 3.5222278 + 1.1417977 . ln G + 0.2031873 . ln ho
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References
FOLIN, O. & CIOCALTEAU, V. On Tyrosine on Triptophane determinations in proteins. J. Biol. Chem., v.73, n.2, p.627-651. 1927.
MINISTÉRIO DO INFERIOR . Fundação Instituto Brasileiro de Geografia e Estatística. Divisão do Brasil em Microregiões Homogêneas, Rio de Janeiro, 1986.
MINISTÉRIO DO INFERIOR . IX Recenseamento Geral do Brasil. Rio de Janeiro, v. 2, t. 3, n. 22, 1ª e 2ª parte. 1980.
MORENO, J. A. Clima do Rio Grande do Sul. Porto Alegre: Oficinas Gráficas da Secretaria da Agricultura - RS, 1961. 34p.
OLIVEIRA, H. A. Acácia-negra e tanino no Rio Grande do Sul. Canoas: La Salle, 1968. V.2, 121p.
PEREIRA, J. C. D.; MAETRI, R.; LAVORATI, O. J. O efeito do anelamento basal na produção de tanino em acácia-negra. Curitiba: Embrapa-Centro Nacional de Pesquisa de Florestas, 1985. 3p.
POSENATO, R. E. Ensaio de espaçamento em acácia-negra. Roessleria, Porto Alegre, v.1, n.1, p.125-130, 1977.
SHERRY, S.P. The Black Wattle (Acacia mearnsii). Pietermoritzburg: University of Natal Press, 1971. 402p.
SCHNEIDER, P. R. & SILVA, J.A. Índice de sítio para acácia-negra, Acacia mearnsii De Wild. Brasil Florestal, Santa Maria, v. 36, p.58-82, 1980.
SILVA, M.G. & FIZZO, S.M. Determinação de tanino na casca de Acacia mearnsii De Wild. em diferentes altura do tronco. Santa Maria, Ciência e Natura, n.7, 57-61. 1985.
SCHOENAU, A. P. G. A site evolution study in Black Wattle (Acacia mearnsii De Wild.). Ann. Univ. von Stellenbosh, Stellenbosh, v.44, n.2A, p.214, 1969a.
SCHOENAU, A. P. G. Bark sampling at brast heigt to estimate mean tannin and a moisture content in wattle stands. Pietermoritzburg: Wattle Research Institute Report, 1969b. p.64-69.
