GROWTH OF THE BLACK-WATTLE, Acacia mearnsii De Wild IN DIFFERENT SPACINGS
DOI:
https://doi.org/10.5902/19805098484Keywords:
growth, spacing, Acacia mearnsii.Abstract
In the present work the influence of initial spacing on growth of Acacia mearnsii de Wild was studied. The experiment was conducted in randomized blocks with five treatments and four repetitions defined by spacing between plants of 1 x 1m, 2 x 1m, 3 x 1m, 3 x 1,33 m and 3 x 2 m. The results allowed the conclusion that the smaller the spacing the larger the production of wood with bark on a per hectare basis; however this happenned with Smaller men diameter. The growth of diameter and total height was directly proportional to spacing, but basal area, volume outside bark and weight of the green bark per hectare were inversely proportional to spacing. Dominant height was not affected by the spacings used.
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References
ASSMANN, E. Waldertragskunde. Muenchen: BLV Verlagsgessellschaft, 1961. 435 p.
LEMOS, R. C.; AZOLIN, M. A. D.; ABRÃO, P. V. R. et al. Levantamento de reconhecimento dos solos do Estado do Rio Grande do Sul. Recife: Ministério da Agricultura, Departamento de Pesquisas Agropecuárias – Divisão de Pesquisas Pedológicas, 1973. 431 p.
BRASIL. Ministério do Inferior. Levantamento dos recursos naturais. Rio de Janeiro: Radan, 1986. v. 33.
MORENO, J. A. Clima do Rio Grande do Sul. Porto Alegre: Secretária da Agricultura – RS, 1961. 34 p.
POSENATO, R. E. Ensaio de espaçamento em acácia-negra. Roessleria, v. 1, n. 1, p. 125-130, 1977.
RICHARDS, F. J. A flexible growth function for empirical use. Jor. Agr. Pres., v. 46, n. 7, p. 632-638, 1959.
SCHNEIDER, P. R. & HOSOKAWA, R. T. Estudo de equações volumétricas para tabela de volumes com e sem casca para acácia-negra. Silvicultura. Anais do 3. Congresso Florestal Brasileiro.Manaus, v. 2, 1978.
SCHNEIDER, P.R. Modelos de equações e tabelas para avaliar o peso de casca de acácia-negra. 1978. 149 p. Dissertação (Mestrado em Ciências Florestais) – Universidade Federal do Paraná, Curitiba.
SCHOENAU, A. P. G. A site evolution study in Black Wattle (Acacia mearnsii De Wild). Ann. Univ. von Stellenbosh, v. 44, n. 2A, p. 79-214, 1969.
SCHOENAU, A. P. G. Height growth and site index curves for Acacia mearnsii on the Uasingishu Plateau of Kenya. Commonwealth Forestry Review, v. 52, n. 153, p. 245-253, 1973.
SHERRY, S. P. The Black Wattle (Acacia mearnsii). Pietermoritzburg: University of Natal Press, 1971. 402 p.
STASTISTICAL ANALYSIS SYSTEM – SAS. Institute Inc. North Carolina. 1996. (versão 6.0).