/img alt="Imagem da capa" class="recordcover" src="""/>
Dissertação
Dinâmica de nutrientes em florestas secundárias de terra firme na Amazônia Central
Second growth, even when substantially different from the original forests in terms of floristics, plays important ecological functions, restoring some of the most important benefits to the system. This study aimed to determine the effects of differences in vegetation cover on the nutritional qua...
Autor principal: | Oliveira, Fabiane Lima de |
---|---|
Grau: | Dissertação |
Idioma: | por |
Publicado em: |
Instituto Nacional de Pesquisas da Amazônia - INPA
2020
|
Assuntos: | |
Acesso em linha: |
https://repositorio.inpa.gov.br/handle/1/11973 http://lattes.cnpq.br/3768334375801220 |
Resumo: |
---|
Second growth, even when substantially different from the original forests in terms of
floristics, plays important ecological functions, restoring some of the most important benefits to the
system. This study aimed to determine the effects of differences in vegetation cover on the
nutritional quality of litter and soil and recycling of nutrients. so samples were taken from soil,
newly fallen litter and the litter-layer accumulated on the ground, in the PDBFF in BR 174, about
80 km north of Manaus. Three plots were sampled for each of the types of vegetation considered:
ongoing pasture active, post-pasture second growth, post-harvest second growth, post-seringa
second growth and primary forest. It was found that although the soil under pastures has higher
concentrations of active organic matter and nutrients (K, Ca and Mg), the very low input of
nutrients, especially nitrogen and basic cations provided by the litterfall into the system is leading it
to the nutrient exhaustion in a short term period. In general and for the variable under study, the
second growth vegetations in this study, all with more than 17 years of regeneration, are in such an
advanced stage of secondary succession that masked any influences that either type of system or
management might have had in the past. By the level of their recovery and function it was shown
that those second growth surrounding the forest fragments are providing an important
environmental service not only to recover biomass plant, restructuring the forest landscape and
important ecological functions, but also in the recovery of the recycling of nutrients in soil
including fixing carbon.
3 |