RECUPERAÇÃO DA COBERTURA VEGETAL E DA ATIVIDADE FOTOSSINTÉTICA EM JAZIDAS REVEGETADAS NO DISTRITO FEDERAL

Rodrigo Studart Corrêa; Alexander Paulo do Carmo Balduíno; Cláusio Tavares Viana Teza; Gustavo Macedo de Mello Baptista; Douglas José da Silva

doi:10.5327/Z2176-947820170208

Authors

Rodrigo Studart Corrêa Universidade de Brasília https://orcid.org/0000-0002-9422-2629
Alexander Paulo do Carmo Balduíno Universidade de Brasília https://orcid.org/0000-0003-4285-2685
Cláusio Tavares Viana Teza Universidade Católica de Brasília https://orcid.org/0000-0002-7527-7528
Gustavo Macedo de Mello Baptista Universidade de Brasília https://orcid.org/0000-0002-1973-2725
Douglas José da Silva Universidade Católica de Brasília

DOI:

https://doi.org/10.5327/Z2176-947820170208

Keywords:

mining; restoration; vegetation index.

Abstract

The recovery of biomass production capacity is an essential step towards the rehabilitation of ecosystems. In this work we used remote sensing to evaluate the temporal development of vegetation cover and photosynthetic activity in gravel mines revegetated with five techniques commonly used in the Brazilian Federal District: natural regeneration, tree plantation, cultivation of trees + herbs, topsoil replacement + tree plantation, and sewage sludge incorporation into mining substrates. Results showed that mines left under natural regeneration would require a secular time to achieve a satisfactory vegetation cover. Tree plantation required fifteen years to provide a mine 80% of vegetation cover. The use of topsoil + trees or the incorporation of sewage sludge into mining substrates achieved the fastest development of vegetation cover (2.5 to 5.0 years) and the highest percentages of revegetated surface (80 to 95%). However, the five study revegetation techniques achieved from 60 to 80% the values of photosynthetic activity measured in native areas of Cerrado.