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| Format: | Artículo científico |
| Language: | en |
| Published: |
Universidad Nacional de Colombia
2018
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| Online Access: | https://www.redalyc.org/articulo.oa?id=169959535005 https://www.redalyc.org/journal/1699/169959535005/ https://www.redalyc.org/journal/1699/169959535005/html/ https://www.redalyc.org/journal/1699/169959535005/169959535005.epub https://www.redalyc.org/journal/1699/169959535005/movil |
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Table of Contents:
- Evolution and accumulation of C-CO2 in biogenic and physiogenic aggregates of different agroecological management systems Luiz Alberto Silva Rodrigues Pinto Octávio Vioratti Telles Mendonga Celeste Queiroz Rossi Marcos Gervasio Pereira Fabiana da Costa Barros Agrociencias respiration Biogenic aggregates carbon mineralization 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 Flemingia macrophylla (FLE), and (5) 6-year no-till planting system with corn and eggplant (NT) in Red-Yellow Argisol 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-CO2 were determined in the laboratory after 35 days of incubation. The biological and physiogenic aggregates of the different agricultural management systems resulted in peaks of C-CO2 evolution up to the 20th day of incubation, with stabilization at 35 days of evaluation. The NT area under agroecological management presented higher C-CO2 accumulation among the systems with biogenic aggregates and less accumulation in the physiogenic aggregates. 2018 artículo científico 0120-2812 https://www.redalyc.org/articulo.oa?id=169959535005 https://www.redalyc.org/journal/1699/169959535005/ https://www.redalyc.org/journal/1699/169959535005/html/ https://www.redalyc.org/journal/1699/169959535005/169959535005.epub https://www.redalyc.org/journal/1699/169959535005/movil 10.15446/acag.v67n4.67923 en http://www.redalyc.org/revista.oa?id=1699 Acta Agronómica application/pdf Universidad Nacional de Colombia Acta Agronómica (Colombia) Num.4 Vol.67