Data/hora: 31/05/2024 03:34:15

Biblioteca(s): 	Embrapa Unidades Centrais.	
Data corrente: 	27/09/2004	
Data da última atualização: 	28/08/2018	
Autoria: 	CANELLAS, L. P.; ESPINDOLA, J. A. A.; GUERRA, J. G. M.; TEIXEIRA, M. G.; VELLOSO, A. C. X.; RUMJANEK, V. M.	
Afiliação: 	Luciano Pasqualoto Canellas, Universidade Estadual do Norte Fluminense - UENF/Laboratório de Solos; JOSE ANTONIO AZEVEDO ESPINDOLA, CNPAB; JOSE GUILHERME MARINHO GUERRA, CNPAB; Marcelo Grandi Teixeira, CNPAB; Ary Carlos Xavier Velloso, Universidade Estadual do Norte Fluminense - UENF/Laboratório de Solos; Victor Marcos Rumjanek, Universidade Federal Rural do Rio de Janeiro - UFRRJ/Departamento de Química.	
Título: 	Phosphorus analysis in soil under herbaceous perennial leguminous cover by nuclear magnetic spectroscopy.	
Ano de publicação: 	2004	
Fonte/Imprenta: 	Pesquisa Agropecuária Brasileira, Brasília, DF, v. 39, n. 6, p. 589-596, junho 2004	
Idioma: 	Inglês	
Notas: 	Título em português: Análise de fósforo em solo com leguminosas herbáceas perenes por meio de ressonância magnética nuclear.	
Conteúdo: 	The availability and the reserves of organic phosphorus are controlled by its mineralization rate and are also influenced by changes in soil management. The objective of this study was to evaluate the influence of soil covering with different leguminous plant on soil organic P by 31P-NMR spectroscopy. Alkaline soil extracts were obtained from two depths (0-5 and 5-10 cm) of an Ultisol cultivated with herbaceous perennial leguminous plants (Arachis pintoi, Pueraria phaseoloides, Macroptilium atropurpureum). In an adjacent area, samples of the same soil cover with a secondary tropical forest and grass (Panicum maximum) were also collected. The leguminous management was divided into with removal and without removal of shoot parts after cut on soil surface. Phosphate monoesters are the dominant P species in all soil samples and P diesters accumulated on the superficial layer of secondary forest soil. The P amount of this fraction is higher for the legume covered soil when compared with the grass covered soil. The permanence of leguminous plants on the topsoil after the cut promoted an increase in P diester/P monoester ratios. These findings can be accounted for an enhancement of P availability to plants in soils cultivated with leguminous plants.	
Palavras-Chave: 	cultivation; cultivo; culturas de cobertura do solo.	
Thesagro: 	Desmatamento.	
Thesaurus Nal: 	cover crops; deforestation.	
Categoria do assunto: 	--	
URL: 	http://ainfo.cnptia.embrapa.br/digital/bitstream/AI-SEDE/28225/1/39n06a11.pdf	
Registro original: 	Embrapa Unidades Centrais (AI-SEDE)	
Exemplares: 	AI-SEDE - (28225-1) - UPE - AP - PP - 630.72081 - P474 -  - DIS