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Advances in Forestry Science
Number of Followers: 5

This is an Open Access Journal

Open Access journal
ISSN (Print) 2357-8181 - ISSN (Online) 2357-8181
Published by Universidade Federal de Mato Grosso (UFMT)

[15 journals]

Operational management of the woodyard in the wood chip production for
pulp and paper industry
- Authors: Aline Durigan, Rudson Silva Oliveira, Ivan Mischka Sgarbiero, Dimas Agostinho da Silva
  Pages: 1799 - 1809
  Abstract: The growing demand for pulp in the global market contributes to the increase in competitiveness among producers and one of the factors that ensure the attractiveness of Brazilian pulp in the international market is the high silvicultural technology and management of the production process, resulting from the constant search for greater optimization of supplies and reduction of operational costs. In this sense, under the hypothesis that the longer downtime of wood processing, higher cost to the company. This study aimed to identify the factors that influence the unscheduled downtime in the processing of Eucalyptus dunnii logs to woodchip production and evaluate the efficiency of mitigating actions implemented to optimize the operation and maximize chip production. To conduct this investigation a preliminary analysis was performed from the PI System software database used by the company to manage the wood processing line, in which the main equipment and services responsible for the unscheduled shutdowns were identified. Then, the downtime and production data were compared considering the result before and after the implementation of the improvement action. The standardization of the raw material was one of the main results because it influenced the reduction of clogging infeed of the processing line, ensuring an increase in chip production by 10 tons hours-1 by month. Overall, all the implemented actions were efficient except for the exchange knives, which was not enough to achieve the set goal.
  PubDate: 2022-10-04
  DOI: 10.34062/afs.v9i3.13409
  Issue No: Vol. 9, No. 3 (2022)
Litter deposition dynamics, crown morphometry and fine root production of
Eucalyptus urophylla hybrid clones under water stress
- Authors: Leandro Silva de Oliveira, Nayara dos Santos de Souza, Nayara Rodrigues Rocha, Wanessa Almeida Mattos, Jéssika Rodrigues Soares, Natália Correia Santos
  Pages: 1811 - 1821
  Abstract: The water deficit can be a limiting factor in the productivity of Eucalyptus spp. and the selection of adapted genotypes to these conditions is necessary. Therefore, understanding the adaptive capacity of genotypes in regions under water stress is crucial for the selection of genotypes. Thus, this work aimed to evaluate the litter deposition dynamics, crown development and fine root production of two hybrid clones of E. urophylla spp. The following were analyzed: (1) litter accumulation and its water retention capacity (CRH), (2) dendrometric growth and tree crown morphometry, and (3) biomass production of live and dead fine roots (0-25 and 25- 50 cm depth) during dry and rainy seasons. The litter deposition dynamics of clones was influenced by water seasonality, which was higher in the rainy season. For water retention capacity there were no differences. In turn, the genotypes showed adaptive differences, verified by the highest morphometric values of crown (ge, is and iev) in the dry season. Clone A had a higher significantly percentage of crown than clone B, whose leaf litter deposition was higher in the dry season. The highest production of fine root biomass was found in the 0-25 cm layer of the soil, being higher in clone B in both layers. So, the results open perspectives for further studies on the ecophysiology of the genetic materials of Eucalyptus spp and its applicability in forest genetic breeding for the selection of more productive and efficient genotypes for plantations in areas under water stress.
  PubDate: 2022-10-04
  DOI: 10.34062/afs.v9i3.13116
  Issue No: Vol. 9, No. 3 (2022)
Effect of foliar fertilization and soil conditioners on the rooting of a
hybrid of Pinus tecunumanii vs. Pinus caribaea var. honduransis
- Authors: Kaline Gomes dos Santos, Luciana Duque Silva, Gleice Gomes Rodrigues
  Pages: 1823 - 1830
  Abstract: The techniques of seedling production via vegetative propagation are alternative forms of sexual reproduction (use of seeds), however, several factors impair their use in a comprehensive way, such as low rooting rates of some species. The objective of this study was to evaluate the effect of foliar fertilizers and substrate conditioners on rooting rates, growth and production of clonal minestacks of hybrids of Pinus tecunumanii vs. caribaea var. honduransis. The experiments were carried out in a forest nursery in the city of Paranapanema-SP, with a randomized block design, in a 4x2 factorial arrangement. Four foliar fertilizers were used: AF1 based on chitosan, AF3 based on humic acid, AF4 extract of Ascoplhyllum nodosum, and M2AF (mixture of AF1+AF3+AF4, 33.3% of each) and two substrate conditioners: C1 based on marine fish; C2 based on humic acids. The minestacks were evaluated in the greenhouse (rooting rate) and shade house (total height, dry and green mass of shoots and roots) phases. The foliar fertilizer AF4 provided higher rooting rates of the seedlings, together with the AF3 fertilizer combined with the C2 substrate conditioner and the AF1 fertilizer combined with the C2 substrate conditioner. In general, foliar fertilizer AF4 promoted higher rates of plant biomass production.
  PubDate: 2022-10-04
  DOI: 10.34062/afs.v9i3.13338
  Issue No: Vol. 9, No. 3 (2022)
In vitro regeneration of Senna alata (L.) Robx. (Fabaceae): An ancient
medicinal plant
- Authors: Elsy Yaneth Corredor Lara, Angela Maria Imakawa, Daniel Da Silva, Paulo de Tarso Barbosa Sampaio
  Pages: 1831 - 1838
  Abstract: Senna alata, a legume of medicinal importance, presents antifungal and antibacterial antioxidant activity. The main limitation is the presence of seeds with integument dormancy within natural populations. This study aimed to establish an efficient protocol for the in vitro propagation and acclimatization of seedlings. The seeds were disinfected with different concentrations of NaOCl; for the regeneration of the shoots, cotyledon segments were inoculated in MS and WPM medium, supplemented with plant growth regulators, auxins (1-NAA and 2,4-D), interaction with cytokinins (TDZ and BAP), and activated carbon. The seedlings were acclimated in nursery conditions using vermiculite, sand, and soil substrates. Using NaOCl (0.5%) for 30 min resulted in 98.0% disinfected seeds while 95.4% of scarified seeds germinated. High node and shoots numbers (8.3 ± 0.4; 12.6 ± 0.8, respectively) were obtained when using the MS medium containing 1-NAA + TDZ (0.1 + 1.0 mg L-1), while the use of MS medium supplemented with 2,4-D + TDZ (0.1 + 1.0 mg L-1) resulted in longer shoots (6.0 ± 0.5 cm). Using WPM medium with IBA + BAP (1.0 + 0.1 mg L-1) improved rooting (14.0 cm ± 1.3) and the number of roots (5.0 ± 0.0) in the treated plants. The vermiculite substrate with sand promoted 81.5% of acclimatized plants. This study allowed obtaining high levels of germination, regeneration in vitro and acclimatization of S. alata.
  PubDate: 2022-10-04
  DOI: 10.34062/afs.v9i3.12252
  Issue No: Vol. 9, No. 3 (2022)
Determinants of tourists’ willingness to pay for conservation of
ecotourism destinations: A case study of Ikogosi Warm Spring Resort,
Nigeria
- Authors: Adekunle Anthony Ogunjinmi , Jacob Oluwafemi Orimaye, Matthew Attahiru Gana, Abraham Adebayo Adewumi
  Pages: 1839 - 1849
  Abstract: Tourist WTP was estimated using the contingent value method for conservation and protection of Ikogosi Warm Spring Resort in Ekiti State, Nigeria. The Warm Spring is one of Tourist WTP was estimated using the contingent value method for conservation and protection of Ikogosi Warm Spring Resort in Ekiti State, Nigeria. The Warm Spring is one of Nigeria's most beautiful environments, attracting a big number of tourists each year and serving as a significant ecotourism development location. In order to evaluate if demographic characteristics, awareness of natural resource conservation, tourist behavior, motivation, and satisfaction affect WTP, a face-to-face survey employing a questionnaire was done with two groups of tourists, domestic and international visitors to the site. The maximum amount that tourists were willing to pay was computed using the mean and median values. Multiple linear regression analysis was used to determine the factors that influence tourists' WTP. For domestic tourists, the mean and median maximum amount they were willing to pay was US$2.57 and US$2.37 respectively, and for international tourists, US$1.27 and US$1.00. Age, education, income, domicile, and nationality all had an impact on the tourists' WTP, according to the research. It has been suggested that the site's management may use these elements to segment tourists for marketing purposes in order to secure the site's long-term viability.
  PubDate: 2022-10-04
  DOI: 10.34062/afs.v9i3.13173
  Issue No: Vol. 9, No. 3 (2022)
Determination of stacking factors and wood volume stacked through digital
image processing
- Authors: Kleber Vicente Gouveia Filho, Thelma Shirlen Soares, Edmilson Santos Cruz, Renan Augusto Miranda Mathias
  Pages: 1851 - 1858
  Abstract: This study aimed to evaluate the use of digital photographs in determining the stacking factor and stacked wood volume. Wood stacks consisting of logs from six planting spacings (3.0 m x 0.5 m; 3.0 m x 1.0 m; 3.0 m x 1.5 m; 3.0 m x 2.0 m; 3.0 m x 2.5 m and 3.0 m x 3.0 m) were evaluated. To determine the stacked wood volume (stereo) and stacking factors and to obtain digital photographs, 18 wood piles were built, three piles for each spacing. The data obtained was analyzed using Digitora software, and the stacking factor and volume were obtained based on counting the number of points distributed on the photograph. With this each point was observed and classified as an empty point, half point and null point. The accuracy of the photographic method was verified by calculating the percentage differences between the actual values (obtained in the field) and those estimated by the photograph and by graphically analyzing the distribution of the percentage differences by pile and spacing. Additionally, it was verified, by applying the t-test for paired data, if the values obtained by Digitora differed statistically, at 95% confidence probability, from the real values. It was verified that both the stacking factor and the volume, for each spacing, obtained by digital photographs were statistically equal to the value obtained in the field.
  PubDate: 2022-10-04
  DOI: 10.34062/afs.v9i3.13470
  Issue No: Vol. 9, No. 3 (2022)