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Desenvolvimento de espécies nativas do cerrado a partir do plantio de mudas e da regeneração natural em uma área em processo de recuperação, Planaltina-DF

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Repositório Institucional da Universidade de Brasília
Keywords
  • Cerrados
  • Mudas
  • Plantio (Cultivo De Plantas)
  • Degradação Ambiental
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Abstract

The Cerrado biome is considered as hot spot for global biodiversity conservation, for showing its high biodiversity, high degree of endemism and high threat of degradation. This scenario has raised concern about the research for information to support restoration projects of degraded areas. This work aimed to evaluate the Cerrado’s native species from the planting of seedlings and natural regeneration present in an area in recovery process in Embrapa Cerrados, it is located in Planaltina-DF, Brazil. This location refers to a site with a history of degradation where previously, in December 2006, 720 seedlings were planted, distributed in 15 species native to the Cerrado, in accordance with Model native biome. Since December 2007, it has been carried out rubbing to ensure the survival of the seedlings planted and benefit the species provinient regeneration. It was conducted three surveys (February 2010, July 2010 and February 2011) to assess the floristic and phytosociology of the regenerating species in the site, the survival and growth (height and diameter) of seedlings and the regenerating species. The species from the planting of seedlings, 50 months after planting showed from 2,08% to 89,58% of survival. Within this group the species with the highest percentages of survival were Hymenaea courbaril, Plathymenia reticulata, Astronium fraxinifolium, Simarouba versicolor, Tapirira guianensis and G. americana. Concearning growth, the species Simarouba versicolor and Plathymenia reticulata showed the highest increment values in height and diameter significantly different for most of the especies. It was found in the natural regeneration until the last survey, 14 families, 23 species, included in 23 genera. The species with the highest Importance Value Index (IVI) in February 2010 were: Eugenia dysenterica and Machaerium acutifolium. All species from natural regeneration showed high survival, between 66,67% and 100% until the end of the study. The values of increments in height were not significant for the species of natural regeneration.

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