Relação entre grupos de árvores de dossel com liteira de alta e baixa qualidade e a ciclagem de nutrientes em terra firme na Amazônia Central
The high nutritional quality of leaves is indicated by a low C/N ratio and leaves with low nutritional quality by high C/N ratio. In this study six species of litter were used: three species considered to have good nutritional quality and rapid decomposition and three with low quality and slow de...
| Autor principal: | Andrade, Fábia Geórgia Santos 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/1/11980 http://lattes.cnpq.br/9056419280721109 |
| Resumo: |
|---|
|
The high nutritional quality of leaves is indicated by a low C/N ratio and leaves with
low nutritional quality by high C/N ratio. In this study six species of litter were used: three
species considered to have good nutritional quality and rapid decomposition and three with
low quality and slow decomposition. The study aimed to verify differences in decomposition,
nutrient release, nutrient concentrations in the soil beneath these trees and the existence of a
differential macrofauna in the two litter groups. Weight loss showed the expected results,
except for one species, indicating that other factors are acting in addition to C/N ratio and
lignin percentage. The amounts of calcium increased in decomposing leaves continuously
during the experiment, indicating a relative rise, or even result of translocation of Ca from
fungal hyphae and/or by soil fauna. The amounts of magnesium, potassium and phosphorus
should standard results, with higher losses in the rainy season. The element released faster to
soil was potassium. The nutrients determinations in the soil below the chosen species and its
relation with the species nutrients showed no significant values. The differences between
species for the percentage of remaining weight, and the lack of correlation between the
species and soil nutrients, indicate the importance of high trees diversity and proximity in the
Amazon forest for controlling nutrient cycling. |