Data/hora: 15/06/2024 16:21:41

Biblioteca(s): | Embrapa Amazônia Oriental.
Data corrente: | 13/12/2013
Data da última atualização: | 20/10/2022
Autoria: | JOSLIN, A. H.; MARKEWITZ, D.; MORRIS, L. A.; OLIVEIRA, F. de A.; FIGUEIREDO, R. O.; KATO, O. R.
Afiliação: | AARON H. JOSLIN, Warnell School of Forestry and Natural Resources, The University of Georgia; DANIEL MARKEWITZ, Warnell School of Forestry and Natural Resources, The University of Georgia; LAWRENCE A. MORRIS, Warnell School of Forestry and Natural Resources, The University of Georgia; FRANCISCO DE A. OLIVEIRA, UFRA; RICARDO DE OLIVEIRA FIGUEIREDO, CPATU; OSVALDO RYOHEI KATO, CPATU.
Título: | Soil and plant N-budget 1 year after planting of a slash-and-mulch agroforestry system in the eastern Amazon of Brazil.
Ano de publicação: | 2013
Fonte/Imprenta: | Agroforestry Systems, v. 87, n. 6, p. 1339-1349, Dec. 2013.
DOI: | 10.1007/s10457-013-9641-x
Idioma: | Inglês
Conteúdo: | Nutrient losses during slash-and-burn clearing in tropical forests, coupled with demand by food crops, can deplete nutrients and result in crop abandonment after 1?2 years. Slash-and-mulch technology prevents nutrient losses from burning, while mulch decomposition may serve as a nutrient source. This research investigates the release of nutrients from the mulch and potential uptake of released N by plant biomass after a multi-species agroforestry system was planted in June 2005, following the clearing of a 1 ha of 7-year-old forest with a mulching tractor in Igarapé Açu, Brazil. The study evaluated soil conditions, mulch decomposition, and nutrient concentrations of Manihot esculenta and native vegetation under treatments of P+K fertilization in combination with four native tree species and N-fixing Inga edulis, or with three native tree species without I. edulis. Mulch layer N, Ca and Mg content decreased in response to fertilization, while mulch layer P and K content increased. Nutrient content increased in M. esculenta stems and tubers with fertilization and in the presence of I. edulis, and in competing vegetation with fertilization. Estimated tree N content increased 311 % with fertilization, but by 154 % in the presence of I. edulis. Fertilization with P+K, as well as the presence of I. edulis, increased N stocks in total biomass.
Palavras-Chave: | Fertilização; Queima e corte; Sistema agroflorestal.
Thesagro: | Nitrogênio.
Categoria do assunto: | K Ciência Florestal e Produtos de Origem Vegetal
Registro original: | Embrapa Amazônia Oriental (CPATU)
Exemplares: | CPATU - (48806-1) - UPC - AP - DD -  -  -  - DIS