Desempenho silvicultural de Acrocarpus fraxinifolius wight em função de diferentes espaçamentos e idades

Abstract

DESEMPENHO SILVICULTURAL DE Acrocarpus fraxinifolius Wight EM FUNÇÃO DE DIFERENTES ESPAÇAMENTOS E IDADESRESUMO: Acrocarpus fraxinifolius é uma espécie produtora de madeira dura que ocorre naturalmente na Índia, Miamar (Birmânis) e Bangla Desh. Considerando seu potencial madeireiro e sua possibilidade de desenvolvimento no Brasil, realizou-se o presente trabalho, com o objetivo de verificar as influências de diferentes espaçamentos e idades no desempenho silvicultural dessa espécie, visando à obtenção de madeira para a produção de biomassa e serraria. O experimento foi realizado em blocos inteiramente casualizados, com quatro tratamentos e quatro repetições. SILLVICULTURAL PERFORMANCE OF Acrocarpus fraxinifolius Wight IN FUNCTION OF THE DIFFERENT SPACING AND AGESABSTRACT: Acrocarpus fraxinifolius is a hard wood tree species occurring mainly in Indonesia, Malaysia and India. Considering its potential for producing lumber and its development possibilities in Brazil, an experiment was carried out aiming to verify the effects of different spacing on the silvicultural performance of this species in order to produce wood biomass and sawnwood. The experiment was developed in completely randomized blocks with 4 treatments and 4 repetitions. Nine trees were sampled in each treatment, i.e., 36 trees per block, 144 trees overall. The treatments were constituted of four spacing: 1.5 m x 3 m; 2 m x 3 m; 2.5 m x 3 m; 3 m x 3 m. The following parameters were analyzed: diameter at breast height (DBH), total height (HT) and survival; and sectional area (G/pl), basal area (G), volume per plant (V/pl), volume per hectare (V), current annual volume increase and the annual mean increment in volume were calculated. The spacing 3 m x 3 m and 2 m x 3 m presented the highest values of HT, G/pl and V/pl. All tested spacings favored the growth in DBH, except 3 m x 1.5 m. Other variables did not present statistical differences according to the Scott-Knott test at 5% probability. It was concluded that the best planting spacing for Acrocarpus fraxinifolius at 72 months are 3 m x 3 m and 3 m x 2 m.

Effect of deprivation of selected single nutrients on biometric parameters of cedar seedlings (Acrocarpus fraxinifolius) grown in nutritive solution

“…Seeds of A. fraxinifolius were collected from mother trees at the Historical Campus of UFLA, cleaned and scarified in the Laboratory of Silviculture of the Department of Forest Sciences, as outlined in Venturin et al (2014). Then, seeds were sown in 55 cm 3 tubes containing vermiculite substrate, and wet using deionized water.…”

Tube Volumes and Fertilization Management in Acrocarpus fraxinifolius Seedlings

“…The demand for forest products has increased significantly in recent decades, leading forestry to seek alternatives to high productivity (Thebaldi et al, 2015). In this context, there has been a successful experiment in Brazil to introduce species from other countries, such as Eucalyptus and Pinus (Venturin et al, 2014), and the implantation of commercial forests is important to reduce the forest deficit and to protect native remnants for carbon sequestration (Klippel et al, 2013).…”

MORPHOLOGICAL, ANATOMICAL AND PHYSIOLOGICAL CHARACTERISTICS OF Acrocarpus fraxinifolius WIGHT & ARN SEEDLINGS ACCORDING TO CONTAINERS AND FERTILIZATION

“…Environmental policies employed in many countries around the world strongly promote the conversion of land into forests as an effective measure to mitigate climate change and protect biodiversity (Rudawska et al, 2017). In addition, the demand for products of forest origin has increased in recent decades, demanding alternatives of forest species with high productivity (Thebaldi et al, 2015), as well as the introduction of species which are already known in other countries that have potential for forest restoration and landscaping projects indicated for urban afforestation (Venturin et al, 2014). Thus, the search for species with silvicultural potential is increasingly higher in order to meet market trends, higher productivity and site quality (Klippel et al, 2013).…”

“…In Brazil, the introduction of forest species from other countries is of fundamental importance, not only to reduce the forest deficit but also to protect native fragments for carbon sequestration (Klippel et al, 2013;Venturin et al, 2014). In this sense, the production of high-quality seedlings is of great importance for establishing forest plantations, and which requires the understanding of seedling nutrition, the use of the appropriate substrate, as well as the most appropriate container/tube size (Caione et al, 2012).…”

“…It is native to high rainfall regions of Asia, has rapid growth, it is very promising for reforestation, and used for producing short rotation timber (Trianoski et al, 2011). It occurs more specifically in perennial forests of India, Bangladesh, Indonesia, Nepal and Myanmar (Venturin et al, 2014). In addition, the cedar tree has economic potential for establishing productive plantations (Nisgoski et al, 2012).…”