Title: Physical, chemical, and biological properties of soil under soybean cultivation and at an adjacent rainforest in Amazonia
Author: Beldini, T.P.; Oliveira Junior, R.C.; Keller, Michael; de Camargo, P.B.; Crill, P.M.; Damasceno da Silva, A.; Bentes dos Santos, D.; Rocha de Oliveira, D.;
Source: Rev. Ambient. Água
Publication Series: Scientific Journal (JRNL)
Description: Land-use change in the Amazon basin has occurred at an accelerated pace during the last decade, and it is important that the effects induced by these changes on soil properties are better understood. This study investigated the chemical, physical, and biological properties of soil in a field under cultivation of soy and rice, and at an adjacent primary rain forest. Increases in soil bulk density, exchangeable cations and pH were observed in the soy field soil. In the primary forest, soil microbial biomass and basal respiration rates were higher, and the microbial community was metabolically more efficient. The sum of basal respiration across the A, AB and BA horizons on a mass per area basis ranged from 7.31 to 10.05 Mg CO2-C ha-1yr-1, thus yielding estimates for total soil respiration between 9.6 and 15.5 Mg CO2-C ha-1yr-1 across sites and seasons. These estimates are in good agreement with literature values for Amazonian ecosystems. The estimates of heterotrophic respiration made in this study help to further constrain the estimates of autotrophic soil respiration and will be useful for monitoring the effects of future land-use in Amazonian ecosystems.
Keywords: land use change, microbial metabolic quotient, seasonality
- We recommend that you also print this page and attach it to the printout of the article, to retain the full citation information.
- This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.
XML: View XML
Beldini, T.P.; Oliveira Junior, R.C.; Keller, M.M.; de Camargo, P.B.; Crill, P.M.; Damasceno da Silva, A.; Bentes dos Santos, D.; Rocha de Oliveira, D. 2015. Physical, chemical, and biological properties of soil under soybean cultivation and at an adjacent rainforest in Amazonia. Rev. Ambient. Água 10:707 - 719.
Get the latest version of the Adobe Acrobat reader or Acrobat Reader for Windows with Search and Accessibility