Data/hora: 20/06/2024 03:32:16

Biblioteca(s): 	Embrapa Amazônia Oriental.	
Tipo da produção científica: 	Artigo em Periódico Indexado	
Circulação/Nível: 	A - 2	
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