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Caracterização química e decomposição de folhas de espécies arbóreas nativas da Mata Atlântica
| Content Provider | Semantic Scholar |
|---|---|
| Author | Arato, Helga Dias |
| Copyright Year | 2006 |
| Abstract | ARATO, Helga Dias. M.Sc. Universidade Federal de Viçosa, october, 2006. Leaves chemical characterization and decomposition in native tree species from Mata Atlântica. Adviser: Luiz Eduardo Dias. Co-Advisers: Nairam Félix de Barros and Julio César Lima Neves. In degraded environments biogeochemical cycle following litter decomposition is very important to maintain plant and animal communities. To study the nutrients release coming from leaves of cycling species potentially useful in revegetation programs is fundamental to know the nutrients cycling process, and its sustainability. Organic materials with fast decomposition are sources of nutrients and energy to biota, while more resistant materials remain on the soil, acting as a physical protection. Rapid decomposition of plant materials, in general, shows negative correlation with lignin and cellulose contents, lignin/nitrogen (lig/N), carbon/nitrogen (C/N) and carbon/phosphorus (C/P) ratios; conversely, shows positive correlation with nitrogen (N) and phosphorus (P) contents. Therefore, it was hypothetised that the kinetic decomposition and nutrients release from leaves is function of its chemical composition and environmental conditions, this study aimed to: characterize chemically leaves from 10 native trees species from Mata Atlântica in Viçosa region, Minas Gerais State; evaluate the leaves decomposition in field and greenhouse conditions, relating it with leaves chemical composition, and; evaluate leaves nutrients release. Chemical characterization was carried by the determination of total carbon (C), nitrogen (N), lignin, cellulose, phosphorus (P), sulfur (S), calcium (Ca), magnesium (Mg) and potassium (K) in the leaves. Species were separated into three groups according to estimated leaves speed decomposition (fast, intermediary, and slow), considering C, N, lignin and cellulose contents and C/N and lig/N ratios. Four species were classified with fast decomposition (Senna macranthera, Trema micrantha, Bauhinia forficata, Croton floribundus), three with intermediary (Cassia ferruginea, Zeyheria tuberculosa e Luehea grandiflora), and three with slow decomposition (Aegiphila sellowiana, Schinus terebenthifolius e Mabea fistulifera). Further leaves collection and characterization was performed before the decomposition essay, which was run with 18 litter bags with fresh leaves from each specie and environment (field and greenhouse). In greenhouse, litter bags were inserted in pots with topsoil from a secondary forest, and in field conditions |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | https://www.locus.ufv.br/bitstream/handle/123456789/5513/texto%20completo.pdf?isAllowed=y&sequence=1 |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
