Tree Diameter Growth Following Silvicultural Treatments in a Semi-Deciduous Secondary Forest in Central Brazil

Abstract

ABSTRACT:In the Cerrado biome of Brazil, savannas and dry forests are intimately linked and form mosaics. These forests are composed of species of high commercial value, well accepted in the timber market, which causes intensive deforestation on the remaining vegetation. Thus, the management of these forests is an important alternative to reduce deforestation in the remaining vegetation. The objective of this study was to analyze the response of tree species in relation to silvicultural treatments of competition and liana cutting in a semi-deciduous forest in Central Brazil. The results showed that community basal area increased 24% over 4.8 years and the median periodic annual increment in diameter was about 20% higher in plots with silvicultural treatments: 2.9 mm . yr -1 in the control compared to 3.2 mm . yr -1 to 3.6 mm . yr -1 between treatments. This study demonstrated that it is possible to increase the rates of radial growth through silvicultural techniques. CRESCIMENTO DIAMÉTRICO EM FUNÇÃO DE TRATAMENTOS SILVICULTURAIS EM UMA FLORESTA ESTACIONAL SEMIDECÍDUA NO BRASIL CENTRAL RESUMO:No Bioma Cerrado, as florestas estacionais e o Cerrado stricto sensu estão intimamente ligados, fomando mosaicos. Essas florestas são compostas por espécies de alto valor comercial, bem aceitas no mercado madeireiro, o que provoca o desmatamento intensivo dessas matas. Assim, o manejo dessas florestas é uma alternativa importante para reduzir o desmatamento nos remanescentes, na medida em que proporciona o seu uso sustentável. Este estudo analisou o crescimento de espécies arbóreas em relação a tratamentos silviculturais de liberação de competição e corte de cipós, em uma floresta estacional semidecídua, no Brasil Central. Os resultados mostraram que a área basal da comunidade aumentou 24%, durante 4,8 anos e que a média do incremento periódico anual em diâmetro foi cerca de 20% maior nas parcelas onde ocorreram os tratamentos silviculturais: 2,9 mm . ano -1 , na testemunha, comparado a 3,2 mm . ano -1 to 3,6 mm.ano -1 entre os tratamentos. O estudo demostrou que é possível aumentar o ritmo de crescimento das espécies com a aplicação dos tratamentos silviculturais testados.

AGRARIAN ACADEMY , Centro Científico Conhecer - Goiânia, v.3, n.06; p. 2016 1 CERRADO FORESTS: SEASONAL FOREST AND CERRADÃO

“…Some species do not support low moisture, for example, but others end up benefiting, such as some species of vines that have large abundance in the fragment (SILVA-NETO et al, 2015;VENTUROLI et al, 2015). Thus, the natural balance is compromised; there may be great loss of species richness of variation and differentiation of the basal area of the species found on the edge and inside the fragment.…”

“…To check the health of the structure of the tree assembly in the area were carried out frequency distributions of height; circumference and area of basal plant measured per plot, and checked their distribution pattern and enabling comparison with other areas and future long-term studies (SILVA-NETO et al, 2015;MARTINS et al, 2016). To relate the soil characteristics with the fragments, abundance and richness of forest species was carried out analysis of the canonical components (SIQUEIRA et al, 2016;VENTUROLI et al, 2015).…”

Growth Model of Remmant Stands in Selectively Logged Forest, Papua

“…Kegiatan pengusahaan hutan selama ini ternyata telah menyebabkan terjadinya penurunan baik kuantitas dan kualitas hutan primer (Kuswandi & Murdjoko, 2015;Margono, Potapov, Turubanova, Stolle, & Hansen, 2014) yang secara langsung bisa berdampak pada kelestarian keanekaragaman dan produksi hutan. Penerapan sistem silvikultur yang tepat, seperti penentuan diameter tebang minimum (Kuswandi & Murdjoko, 2015), penerapan jatah tebang tahunan (AAC) secara benar (Vanclay, 1996), siklus dan intensitas tebang (Brienen & Zuidema, 2006;Buijks & Haasnoot, 2012;Dauber, Fredericksen, & Pena, 2005;Rozendaal, SolizGamboa, & Zuidema, 2010;Venturoli, Franco, & Fagg, 2015) diharapkan dapat mengurangi seminimal mungkin dampak kerusakan pada hutan bekas tebangan.…”

“…Penelitian tentang model pertumbuhan baik model pertumbuhan per pohon, model kelas tegakan dan model seluruh tegakan (Hevia, Cao, Álvarez-González, Ruiz-González, & von Gadow, 2015;Turland, 2007) telah banyak dilakukan dengan menggunakan model matriks (Adame, Brandeis, & Uriarte, 2014;Krisnawati et al, 2008;Leoni et al, 2011;Nascimento, do Amaral Machado, Figueiredo Filho, & Higuchi, 2014;Návar, 2014;Orellana, Figueiredo Filho, Netto, & Vanclay, 2016;Picard & Liang, 2014;Pukkala et al, 2009;Pütz, Groeneveld, Alves, Metzger, & Huth, 2011;Roitman & Vanclay, 2015;Venturoli et al, 2015;Wang et al, 2009). Namun penelitian model pertumbuhan dengan model linier belum banyak dilakukan.…”

“…Selanjutnya disebutkan bahwa upaya untuk memasukan informasi site dalam model pertumbuhan tegakan pada hutan tropis menghasilkan tingkat keberhasilan yang beragam. Venturoli et al (2015) menambahkan bahwa persaingan antara dan di dalam populasi secara signifikan dapat berpengaruh terhadap tingkat pertumbuhan diameter.…”