Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Registro completo
Provedor de dados:  Repositório Alice
País:  Brazil
Título:  Gradients in N-cycling attributes along forestry and agricultural land-use systems are indicative of soil capacity for N supply.
Autores:  FAGOTTI, D. S. L.
MIYAUCHI, M. Y. H.
OLIVEIRA, A. G.
SANTINONI, I. A.
EBERHARDT, D . N.
NIMTZ, A.
RIBEIRO, R. A.
PAULA, A. M.
QUEIROZ, C. A. S.
ANDRADE, G.
ZANGARO, W.
NOGUEIRA, M. A.
Data:  2012-12-03
Ano:  2012
Palavras-chave:  Solo
Qualidade
Nitrificação
Amonificação
Soil quality
Nitrification
Ammonification
Resumo:  Indicators of soil quality associated with N-cycling were assessed under different land-use systems (native forest ? NAT, reforestation with Araucaria angustifolia or Pinus taeda and agricultural use ? AGR) to appraise the effects on the soil potential for N supply. The soil total N ranged from 2 to 4g⁄ kg (AGR and NAT, respectively), and the microbial biomass N ranged from 80 to 250 mg⁄ kg, being higher in NAT and A. angustifolia, and lower in P. taeda and AGR sites. Activities of asparaginase (ca. 50?200 mg NH 4 + -N ⁄ kg per h), glutaminase (ca. 200?800 mg NH -N ⁄ kg per h) and urease (ca. 80?200 mg NH -N ⁄ kg ⁄ h) were also more intense in the NAT and A. angustifoliareforested soils, indicating greater capacity for N mineralization. The NAT and AGR soils showed the highest and the lowest ammonification rate, respectively (ca. 1 and 0.4 mg NH 4 + -N ⁄ kg per day), but the inverse for nitrification rate (ca. 12 and 26%), indicating a low capacity for N supply, in addition to higher risks of N losses in the AGR soil. A multivariate analysis indicated more similarity between NAT and A. angustifolia-reforested sites, whilst the AGR soil was different and associated with a higher nitrification rate. In general, reforestation with the native species A. angustifolia had less impact than reforestation with the exogenous species P. taeda, considering the soil capacity for N supply. However, AGR use caused more changes, generally decrease in indicators of N-cycling, showing a negative soil management effect on the sustainability of this agroecosystem.

2012
Tipo:  Artigo em periódico indexado (ALICE)
Idioma:  Inglês
Identificador:  33861

http://www.alice.cnptia.embrapa.br/handle/doc/940939

http://ainfo.cnptia.embrapa.br/digital/bitstream/item/71220/1/2012-SUM-V28-p292-298-Fagotti.pdf

10.1111/j.1475-2743.2012.00418.x
Editor:  Soil Use and Management, Oxford, v. 28, n. 3, p. 292-298, Sept. 2012.
Relação:  Embrapa Soja - Artigo em periódico indexado (ALICE)
Fechar
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional