FORESTRY RESTORATION IN ABANDONED PASTURES OF Urochloa BY DIFFERENT SIZES OF BRUSHWOOD

Abstract

The brushwood is a technique of environmental complexation, which consists in the use of plant residues. This technique, when well established technically, can exert influence on seedbed quality, fostering native plant establishment and ecosystem restoration. In this way, we aimed to evaluate the efficiency of brushwood for the induction of natural regeneration of native species in an area covered by exotic inhibitory grasses of the genus Urochloa, as well as check the minimum size required to prevent the re-invasion of the forage. As a hypothesis, we adopted the minimum width of 4 m as sufficient for the establishment of natural regeneration prior to the reoccupation of grasses. The experiment was conducted between May 2014 and May 2016 in Morretes-PR in a lowland evergreen rain forest area. Seven different sizes of brushwood were compared: 6 x 1, 6 x 2, 6 x 3, 6 x 4, 6 x 5, 6 x 6 m and control treatment. Woody species were identified and counted and herbaceous cover percentage estimated after 4, 8, 12, 18 and 24 months. There was no resumption of natural succession of native species. At any size, brushwood alone was ineffective to prevent the growth by grasses from the edges of the plots, and, since it constitutes a residue pile, it further complicates the establishment of woody species. For the creation of safe sites and consequent restoration by natural regeneration, there is a need for local elimination of Urochloa forages, without which native species are unlikely to survive.

Análise Multicritério Na Definição De Áreas Prioritárias Para Recuperação Florestal Na Bacia Do Rio Doce, Em Minas Gerais

“…A restauração florestal tem como finalidade o reestabelecimento da estrutura vegetal e da ecologia destas comunidades, facilitando a recuperação natural do ecossistema (TRETIN et al, 2018), de forma técnica e operacional (FRAGOSO et al, 2017). Além disso, é uma das metas e objetivos assumidos pelo Brasil durante a 11ª Conferência das Partes da Convenção-Quadro das Nações Unidas sobre as Mudanças do Clima (United Nations Framework Convention on Climate Change -UNFCCC), realizada em 2015 em Paris (SCARAMUZZA et al, 2016), propondose o reflorestamento de 12 milhões de hectares de florestas nativas até 2030, integrando os principais compromissos assumidos na INDC (Intended Nationally Determined Contribution) (INDC, 2015;COP21, 2015).…”

Fauna Associated with Brushwood Transposition in a Mining Area in the South of Brazil

“…Studies addressing fauna communities in the restoration process are still incipient in Brazil (Vergílio et al, 2013). The fauna is generally a little addressed indicator in studies that use nucleating techniques for ecological restoration, including brushwood (Fragoso et al, 2017;Oliveira & Engel, 2017).…”