análise técnica e estimativas de custos de inventário de prospecção em uma floresta estacional semidecidual submontana technical analysis and costs estimates of a complete enumeration forest inventory of a submontane semideciduous seasonal forest
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ID: 238092
2005
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Abstract
Dentre as atividades que compõem um sistema de manejo florestal, a colheita é a mais dispendiosa e, quando realizada sem planejamento, acarreta sérios danos à estrutura da floresta. Para uma exploração de baixo impacto, isto é, para minimizar os danos à regeneração natural e às árvores remanescentes, é obrigatório realizar levantamento detalhado da área a ser manejada. O objetivo principal deste trabalho foi propor uma metodologia de inventário de prospecção com mapeamento arbóreo. Em uma unidade de produção anual de 24,25 ha, foram inventariados 2.707 indivíduos arbóreos, com DAP > 20 cm, que, além das características quantitativas e qualitativas, tiveram as suas coordenadas (UTM) determinadas e arquivadas em um banco de dados georreferenciados. As análises do inventário de prospecção englobaram a viabilidade técnica e a determinação do custo do método proposto. A metodologia, com base na utilização de equipamento digital de medição de distância, mostrou-se exeqüível. O rigor exigido na determinação da localização das árvores, assim como as características de relevo, sub-bosque denso e grande infestação de cipós, influenciou no rendimento do inventário de prospecção, que foi de 442 m por dia para a abertura de picadas e de 0,80 ha por dia para a realização do inventário de prospecção. O custo da abertura de picadas e do inventário de prospecção foi de US$ 35,69/ha e US$ 89,43/ha, respectivamente.
Among the activities which compose a forest management system, harvest is the most expensive one, and when it is carried out without planning it causes severe damages to the forest structure. To perform low impact exploitation, that is, to minimize damages to natural regeneration and remaining trees, a detailed survey of the area to be managed must be done. The main objective of this work was to propose a new methodology of prospection survey with an arboreous mapping. In a unit of annual production of 24.25 ha, 2,707 arboreous individuals were surveyed, with DBH > 20 cm, and their data of quantitative and qualitative features, besides their geographic coordinates (UTM) were kept in a geographic referred database. The prospection survey analyses included the technical viability and the determination of cost of the proposed method. The prospection survey methodology, based on the use of digital equipment for distance measurement, showed to be technically feasible. The accuracy required in the determination of the position of the trees, as well as the relief conditions, dense understory and great presence of vines, influenced directly the prospection survey outcome, which were of 442 m per day for trail openings, and of 0.80 ha per day for the prospection survey carried out. The cost of trail opening and prospection survey were of US$35.69 and US$89.43 per hectare, respectively.
Among the activities which compose a forest management system, harvest is the most expensive one, and when it is carried out without planning it causes severe damages to the forest structure. To perform low impact exploitation, that is, to minimize damages to natural regeneration and remaining trees, a detailed survey of the area to be managed must be done. The main objective of this work was to propose a new methodology of prospection survey with an arboreous mapping. In a unit of annual production of 24.25 ha, 2,707 arboreous individuals were surveyed, with DBH > 20 cm, and their data of quantitative and qualitative features, besides their geographic coordinates (UTM) were kept in a geographic referred database. The prospection survey analyses included the technical viability and the determination of cost of the proposed method. The prospection survey methodology, based on the use of digital equipment for distance measurement, showed to be technically feasible. The accuracy required in the determination of the position of the trees, as well as the relief conditions, dense understory and great presence of vines, influenced directly the prospection survey outcome, which were of 442 m per day for trail openings, and of 0.80 ha per day for the prospection survey carried out. The cost of trail opening and prospection survey were of US$35.69 and US$89.43 per hectare, respectively.
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freitas2005revistaanlise
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| Authors | ;Lucas José Mazzei de Freitas;Agostinho Lopes de Souza;Helio Garcia Leite;Márcio Lopes da Silva |
| Journal | journal of veterinary medical research |
| Year | 2005 |
| DOI |
10.1590/S0100-67622005000100008
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