Abstract

This study aimed to evaluate soil organic matter (SOM) fractions in areas under different vegetable coverings and recent crop systems under agroecological management in low lands in the district of Capivari, Duque de Caxias, RJ. Three crop areas were selected: passion fruit, subdivided in passion fruit located in upland (PFUL) and lowland (PFLL) of the landscape; both in consortium, and crotalaria in rotation. An adjacent area of scrub was included to represent the original condition. Total organic carbon (TOC) and respective stock (StTOC) was quantified. Particulate organic carbon (POC) and organic carbon associated to minerals (CAM) were separated by particle size fractionating method (sieving). Carbon stocks of each fraction (StPOC and StCAM) and carbon management index (CMI) were determined. The highest values of TOC, StTOC, POC and StPOC were observed in the PFUL covering. POC allowed the identification of changes caused by the management in the three evaluated areas, being more efficient than TOC in recently implanted experiments. CMI was efficient to discriminate changes among crop systems, however, new evaluation will be necessary with time, due to the small time of cultivation of the areas.

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 call

Disclaimer: 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.