Abstract
Carbon dioxide (CO2) is produced only in biological activities. Understanding how soil tillage practices affect the dynamics of CO2 production is important, as these processes are influenced by the temperature and humidity conditions of the place. This paper aimed at quantifying CO2 flux in hydromorphic floodplain soils under different açai palm tree grove management strategies, correlating it with litter deposition, soil environment, and season of the year. Conducted in the city of Mazagão-AP, four areas of açai palm tree groves were selected with different types of management. During the evaluation period (October, November, and December 2012, and February, March, and April 2013), CO2 flux, soil moisture, and temperature were measured, and litter samples were collected. In addition, rainfall data for the region were also obtained. The CO2 fluxes obtained ranged from 0.37 to 28.55 μmol CO2 m-2 s-1, with a total average of 6.20 μmol CO2 m-2 s-1. In broad analysis, soil variables did not show significant correlations with CO2 emissions. A positive relationship between flux and litter and soil temperature, as well as a negative relationship with its moisture, were observed only in a few months and specific systems.
Highlights
Global observations recorded by the World Meteorological Organization (WMM) until 2018 show that carbon dioxide concentration (CO2) in the atmosphere is 147% higher than in the pre-industrial era
Radiative forcing of long-lasting greenhouse gases (GHGs) has increased 43%, with 81% of that percentage related to CO2 (WMO, 2019)
In the case of floodplains, it is modulated by floods, because in anaerobic environments such as saturated soils exposed to anoxia conditions, CH4 is formed, and it is another important GHG occurring during the process of organic matter decomposition (Bartlett et al, 1990)
Summary
Global observations recorded by the World Meteorological Organization (WMM) until 2018 show that carbon dioxide concentration (CO2) in the atmosphere is 147% higher than in the pre-industrial era. This occurs, mainly, due to emissions from the burning of fossil fuels, deforestation, and other changes in soil management. Radiative forcing of long-lasting greenhouse gases (GHGs) has increased 43%, with 81% of that percentage related to CO2 (WMO, 2019). In Brazil, near 74% of GHG emissions occur due to soil management, being 36% in the Amazon (Seeg, 2018), which can release carbon stocks from trees and the land. In the case of floodplains, it is modulated by floods, because in anaerobic environments such as saturated soils exposed to anoxia conditions, CH4 is formed, and it is another important GHG occurring during the process of organic matter decomposition (Bartlett et al, 1990)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
