Data/hora: 11/06/2024 11:56:17

Provedor de dados: | 90
País: | Brazil
Título: | EFFECT OF WATER AVAILABILITY ON SOIL MICROBIAL BIOMASS IN SECONDARY FOREST IN EASTERN AMAZONIA
Autores: | Rangel-Vasconcelos,Lívia Gabrig Turbay; Zarin,Daniel Jacob; Oliveira,Francisco de Assis; Vasconcelos,Steel Silva; Carvalho,Cláudio José Reis de; Santos,Maria Marly de Lourdes Silva.
Data: | 2015-04-01
Ano: | 2015
Palavras-chave: | Second-growth forest; Irrigation; Fumigation-extraction; Microbial C; Microbial N; Microbial C/N ratio.
Resumo: | Soil microbial biomass (SMB) plays an important role in nutrient cycling in agroecosystems, and is limited by several factors, such as soil water availability. This study assessed the effects of soil water availability on microbial biomass and its variation over time in the Latossolo Amarelo concrecionário of a secondary forest in eastern Amazonia. The fumigation-extraction method was used to estimate the soil microbial biomass carbon and nitrogen content (SMBC and SMBN). An adaptation of the fumigation-incubation method was used to determine basal respiration (CO2-SMB). The metabolic quotient (qCO2) and ratio of microbial carbon:organic carbon (CMIC:CORG) were calculated based on those results. Soil moisture was generally significantly lower during the dry season and in the control plots. Irrigation raised soil moisture to levels close to those observed during the rainy season, but had no significant effect on SMB. The variables did not vary on a seasonal basis, except for the microbial C/N ratio that suggested the occurrence of seasonal shifts in the structure of the microbial community.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832015000200377
Editor: | Sociedade Brasileira de Ciência do Solo
Relação: | 10.1590/01000683rbcs20140135
Formato: | text/html
Fonte: | Revista Brasileira de Ciência do Solo  v.39 n.2 2015
Fonte: | info:eu-repo/semantics/openAccess