Data/hora: 03/06/2024 03:32:33

Provedor de dados: | 109
País: | Colombia
Título: | Effects of burning and weed control on vegetation cover and soil organic matter compartments in the Brazilian Amazon
Autores: | Marinho Lisboa,Fabrício.
Data: | 2018-09-01
Ano: | 2018
Palavras-chave: | Bare soil; Organic carbon; Urochloa brizantha; Weed.
Resumo: | Abstract The aim of this study was to evaluate the effects of burning and manual control of invasive species on a Latossolo Vermelho-Amarelo soil covered with Urochloa brizantha. Five soil samples were collected for pasture and forest, at 0-5 cm depth, to determine the accumulated respiration, microbial biomass carbon (MBC), mild organic matter, total organic carbon (TOC), water soluble carbon and MBC:TOC ratio. Three groups according soil grass coverage were selected: (1) group I with 33.5% of bare soil, (2) group 2 with 90% coverage and (3) group 3 with 53.4% coverage of invasive species. The highest value of TOC was found in forest (36.52 g/kg). The highest accumulative value of respiration in the soil was observed in group 3 (2.6 mg/kg) and the highest MBC:TOC ratio was found in forest and group 3 (0.0138 and 0.0156, respectively). The highest water soluble carbon value was observed in the forest (21.08 mg/kg). No significant differences were found in MBC and mild organic matter. The high coverage percentage of U. brizantha favours high values of TOC and water soluble carbon. The greater diversity of species in grass covered soil favoured greater amount of organic matter and increased microbial activity.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122018000300389
Editor: | Universidad Nacional de Colombia
Relação: | 10.15446/acag.v67n3.60000
Formato: | text/html
Fonte: | Acta Agronómica  v.67 n.3 2018
Fonte: | info:eu-repo/semantics/openAccess