![Organic carbon stocks in soils cultivated with kikuyu grass (Cenchrus clandestinus [Hochst. ex Chiov.] Morrone) in northern Antioquia.](/search/themes/bootstrap3/images/revista.png)
Organic carbon stocks in soils cultivated with kikuyu grass (Cenchrus clandestinus [Hochst. ex Chiov.] Morrone) in northern Antioquia.
Background: Cattle systems are considered greenhouse gas emitters. However, some of their components, such as soil, allow carbon sequestration. Objective: To compare carbon stocks in soils under kikuyu grass for several years and soils with forest or fern cover under different geoforms, in some farms in the North of Antioquia. Methods: A randomized block design was used, in which the blocks corresponded to plant cover. Treatments, in a 3x5 factorial arrangement, included the geoforms and sampling depth. The geoforms (concave, convex and flat), type of plant cover (kikuyu, forest and fern cover), and sampling depth (0-20, 20-40, 40-60, 60-80 y 80-100cm) were considered in the model. Variance analyzes were performed for the variables: amount of carbon in the soil, fine and thick roots, stems, leaves, stolons, dead biomass, and also soil bulk density and pH. Results and conclusions: We found 100t ha-1 of carbon in the first 0-20cm of soil and 20t ha-1 at 80-100cm (p<0.05). There were differences in the contribution of carbon by the roots at 0-20 and 20-40cm deep. The different plant covers did not affect the bulk density of the soil and it was lower for the concave geoform. Contrary to common belief, the change in land use from forest to kikuyu pastures did not have significant effects on soil carbon stocks from the surface to one-meter deep under the evaluated conditions.
| Main Authors: | , , , , |
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| Format: | Digital revista |
| Language: | spa |
| Published: |
Universidad Nacional de Colombia - Sede Palmira
2023
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| Online Access: | https://revistas.unal.edu.co/index.php/acta_agronomica/article/view/97692 |
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