Evolution and accumulation of C-CO2 in different agroecological production systems
The C-CO2 evolution via soil microbial activity can be used as a parameter to highlight differ-ences in agroecological production systems. This work aimed to evaluate the microbial activity of soil through the evolution of C-CO2 (mineralizable carbon) from the respiration of microor-ganisms under different production systems. Was selected five areas: cultivation of fig; passion fruit consortium - Desmodium sp.; cultivation of corn/beans, with conventional tillage (CT) of the soil, cultivation of eggplant/corn under no-tillage (NT) and agroforestry system (AFS). Soil samples were collected at depths of 0.0 - 0.05 and 0.05 - 0.10 m, and was assessed microbial activity (C-CO2 evolution in the laboratory) and the accumulation of C-CO2 for 37 days. Soon after hatching, all systems evaluated showed peaks of C-CO2, with variations of these peaks more pronounced until the 9th day of evaluation. At 21 days there is stabilization of microbial activity. Growing fig resulted in higher peaks of C-CO2 evolution, and also higher accumulations at the end of the 37 day trial. The acreage under NT agroecological showed lower accumulation of C-CO2. The conventional tillage resulted in lower peak C-CO2 at a depth of 5-10 cm.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad Nacional de Colombia - Sede Palmira
2013
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| Online Access: | https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/36819 |
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