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Inventario diagnóstico da regeneracao natural da vegetacao em área da Floresta Nacional do Tapajós

by Carvalho, J.O.P. de.
Series: Boletim de Pesquisa - EMBRAPA. Centro de Pesquisa Agropecuaria do Trópico Umido (Brasil).Publisher: Belem, PA (Brasil) 1980Description: 23 p.Subject(s): METODOS | INVENTARIOS FORESTALES | REGENERACION NATURAL | DENSIDAD DE LA POBLACION | AMAZONIA | BRASIL | METHODS | FOREST INVENTORIES | NATURAL REGENERATION | POPULATION DENSITY | AMAZONIA | BRAZIL | METHODE | INVENTAIRE FORESTIER | REGENERATION NATURELLE | DENSITE DE POPULATION | AMAZONIE | BRESIL In: Summary: This work deals with the natural regeneration on a 35 ha area, submitted to partial exploitations, in the Tapajós National Forest. It aims at contributing to the study of natural regeneration sampling systems applicable to the sustained management of the amazonian forest. The malayan method for linear sampling of natural regeneration was utilized with adaptations for the local conditions. Individuals of valuable species were considered from the seedling stage to the 15 cm diameter, at DBH. Twenty-three families, 58 genera and about 80 valuable commercial species of effective or potential value were found. The stand presented a stocking index of 89 per cent and an establishment stocking factor equal to 72 per cent. The percentages of stocked sub-samples with distinct size classes plants were the following: 1B = 15 percent, 1A = 26 percent, E = 70 percent, U sub-index 2 = 55 percent, U sub-index 1 = 95 per cent and R = 90 per cent. The competition index, related to the presence of palms, lianas and wood residues, was 34 per cent. The following conclusions can be drawn from discussion: the 1/4 chain square sampling model was adequate to the natural regeneration dimensions; the natural regeneration of valuable species was high, and can be used in the formation of high value commercial stand; and elimination of competition has to be accomplished at moment, and selective thinnings undertaken in the future to obtain a greater value from the stand.
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This work deals with the natural regeneration on a 35 ha area, submitted to partial exploitations, in the Tapajós National Forest. It aims at contributing to the study of natural regeneration sampling systems applicable to the sustained management of the amazonian forest. The malayan method for linear sampling of natural regeneration was utilized with adaptations for the local conditions. Individuals of valuable species were considered from the seedling stage to the 15 cm diameter, at DBH. Twenty-three families, 58 genera and about 80 valuable commercial species of effective or potential value were found. The stand presented a stocking index of 89 per cent and an establishment stocking factor equal to 72 per cent. The percentages of stocked sub-samples with distinct size classes plants were the following: 1B = 15 percent, 1A = 26 percent, E = 70 percent, U sub-index 2 = 55 percent, U sub-index 1 = 95 per cent and R = 90 per cent. The competition index, related to the presence of palms, lianas and wood residues, was 34 per cent. The following conclusions can be drawn from discussion: the 1/4 chain square sampling model was adequate to the natural regeneration dimensions; the natural regeneration of valuable species was high, and can be used in the formation of high value commercial stand; and elimination of competition has to be accomplished at moment, and selective thinnings undertaken in the future to obtain a greater value from the stand.

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