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Aporte e decomposição da serapilheira na Floresta Atlântica, ilha da Marambaia, Mangaratiba, RJ.

Authors: Pereira, Marcos Gervasio; Menezes, Luis Fernando Tavares de; Schultz, Nivaldo;

Aporte e decomposição da serapilheira na Floresta Atlântica, ilha da Marambaia, Mangaratiba, RJ.

Abstract

A produção e a decomposição de serapilheira de um fragmento de Floresta Atlântica de encosta na Ilha da Marambaia, Mangaratiba, RJ, foram estudadas durante o período de dezembro de 2003 a novembro de 2004. O aporte de serapilheira foi mensurado partindo de trinta coletores cônicos. A taxa de decomposição da serapilheira foi quantificada por meio de 36 sacolas de decomposição instaladas na área. Para avaliação da fertilidade do solo foram coletadas amostras nas profundidades de 0-5, 5-10 e 10-20 cm. A produção total de serapilheira foi de 7,9 Mg ha-1, sendo a maior deposição verificada no mês de novembro e a menor em junho. A fração foliar foi a de maior contribuição em relação às demais. A taxa de decomposição da serapilheira foi 40% em 7 meses de observação, seguindo modelo exponencial. Verificou-se comportamento diferenciado quanto à liberação de N, P e K. Com exceção do fósforo, os maiores valores de nutrientes, carbono e H+Al foram observados na camada superficial.

Keywords

tropical forests, decomposition, S, nutrient cycling, Agriculture, Forestry, SD1-669.5, decomposição, ciclagem de nutrientes, florestas tropicais

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
17
Average
Top 10%
Average
Green
gold