Engenharia Florestal (Sede)
URI permanente desta comunidadehttps://arandu.ufrpe.br/handle/123456789/15
Siglas das Coleções:
APP - Artigo Publicado em Periódico
TAE - Trabalho Apresentado em Evento
TCC - Trabalho de Conclusão de Curso
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Resultados da Pesquisa
Item Benchmarking: análise das práticas de manejo no regime de talhadia em povoamentos florestais(2023-04-25) Santos, Lorena Paulina dos; Fernandes, Ana Paula Donicht; Hakamada, Rodrigo Eiji; http://lattes.cnpq.br/4186459700983170; http://lattes.cnpq.br/7392835869663724; http://lattes.cnpq.br/1644697494502292Given the instability of the global economy, many companies are seeking alternatives to reduce production costs by reevaluating their planning for conducting coppicing in their forest plantations. Coppicing management has a lower cost compared to reform, making it a promising alternative for such scenarios. Thus, this study aims to survey the practices carried out under the coppicing regime among Brazilian forest sector companies. Eight companies from the sector, distributed across six different states in the country, were analyzed. Data were collected using semi-structured interviews and analyzed through descriptive statistics. The results indicated that the main variables considered by companies in selecting a stand for sprout management were: productivity from the previous cycle, genetic material, survival, climate, and distance from the factory. Coppicing management showed an average productivity loss of 11% compared to reform, however, there was a cost reduction of 48%. The study showed that there is variation in the height and age criteria used for sprout removal. Regarding the number of sprouts left per stump, 63% of companies leave 1-2 sprouts. The stump height was also indicated as an important factor to be considered, which can be reduced to as low as 5 cm depending on the genetic material, with the most commonly used height being 10-12 cm. Stump cleaning is a common practice in most companies, and the presence of residues is considered beneficial as they cover a large part of the soil, delaying the regeneration of weeds. It was recommended to fertilize the sprouts before desprouting, especially with potassium, due to the high sensitivity of Eucalyptus to the deficiency of this nutrient. In conclusion, the implementation of the coppicing regime is a complex and challenging process that requires careful strategic planning and critical decisions regarding the reform or management of stands. Nevertheless, it is used promisingly by most companies in the sector to reduce production costs.Item Teores foliares de nitrogênio, fósforo e potássio de espécies florestais tratadas com biocarvão e adubos orgânicos no semiárido pernambucano(2018) Carvalho, Isadora Barros Moura de; Silva, José Antônio Aleixo da; Freire, Fernando José; http://lattes.cnpq.br/8371992516325399; http://lattes.cnpq.br/5674098794412714; http://lattes.cnpq.br/1883959486411942The objective of this work was to analyze N, P and K contents in the leaf material of an angico and eucalyptus' plantation submitted to different sources of fertilization. In order to do that, twenty five leaves of the trees crowns’s middle third were collected from the plot’s useful area. The collected material was packed in paper bags and taken into a forced ventilation oven at 65± 5º C until constant weight was obtained; posterior to that, the material was ground in a Wiley mill, passed through 1.0 mm steel screen and stored for analysis of N, P, K content. The angico was the species that presented the highest concentration of nutrients. Regarding the phosphorus, the fertilization treatment with fish farming residue presented higher levels in the angico, while for the eucalyptus higher levels were observed in the fertilization treatment with lake sediment. Regarding potassium the most expressive values were found in the fertilization treatments with fish farming residue and lake sediments for both species, which did not statistically differ from the control. However, significant differences were observed between the biochar and the other treatments for the eucalyptus. The highest levels of nitrogen were observed in the Angico and there was no significant difference among the treatments. Although the soil was rich in nutrients, it was observed that the sources of fertilization and managed species type interfered in the contents of some elements. The presence of nutrients in the soil is not a guarantee of assimilation by the plants, since many factors can influence the absorption of nutrients by the vegetable. It was concluded that fish farming residue and lake sediments, because of good concentrations of N and P, are alternatives to be used as fertilizers in planted forests.