Evolution and accumulation of C-CO2 in biogenic and physiogenic aggregates of different agroecological management systems

Determination of mineralizable carbon (C) is based on the evolution of C-CO2, reflecting the activity of soil biota in soil organic matter (SOM) decomposition, and can be used as a testing parameter in agroecological production systems. The objective of the present work was to quantify mineralizable...

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Bibliographic Details
Published in:Acta agronomica (Palmira) 2018-10, Vol.67 (4), p.494-500
Main Authors: Pinto, Luiz Alberto Silva Rodrigues, Mendonça, Octávio Vioratti Telles, Rossi, Celeste Queiroz, Pereira, Marcos Gervasio, Barros, Fabiana Costa
Format: Article
Language:English
Subjects:
Accumulation
Aggregates
AGRICULTURE, MULTIDISCIPLINARY
Agroforestry
Biota
Carbon dioxide
Coffee
Corn
Evolution
Fertility
Incubation
Management systems
Organic carbon
Organic matter
Organic soils
Soil organic matter
Total organic carbon
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Summary:Determination of mineralizable carbon (C) is based on the evolution of C-CO2, reflecting the activity of soil biota in soil organic matter (SOM) decomposition, and can be used as a testing parameter in agroecological production systems. The objective of the present work was to quantify mineralizable C in aggregates of different biogenic and physiogenic formation pathways in agroecological management systems in the city of Seropédica, state of Rio de Janeiro. Five sampling areas were selected: (1) 10-year agroforestry system (AFS), (2) 15-year full sun coffee (C-SUN), (3) 15-year shaded coffee (C-SHA), (4) 10-year phlegm alleles (FLE), and (5) 6-year no-till planting system with corn and eggplant (NT) in Red-Yellow Argissolo in Seropédica-RJ.Morphological patterns were used to identify the formation pathway (biogenic and physiogenic) of aggregates.  In these, fertility, total organic carbon (TOC), and total nitrogen (TN) were evaluated.  The evolution and accumulation of C-CO2were determined in the laboratory after 35 days of incubation. The NT area under agroecological management present higher C-CO2 accumulation between the systems with biogenic aggregates and less accumulation in the physiogenic aggregates. 
ISSN:0120-2812
2323-0118
DOI:10.15446/acag.v67n4.67923