Soil nematodes of the corn-soy rotation system and adjacent natural habitats of the Colombian well drained savannahs (Meta department)
The structure of the soil nematode community in the Colombian well drained upland savannas cropped with rice, a corn soy bean rotation system, and natural adjacent habitats of native forest is described. In all, 240 soil samples were collected, 86% from cultivated areas and 14% from natural areas. Extractions were performed using an Oostenbrink elutriator and identifications with the help of key morphological, taking into account morphometry and diagnostic characters. Taxa identified, were assigned to trophic groups at the family level. Shannon diversity, richness Simpson, maturity index (MI), total maturity index (mIM), plant parasitic index, fungi/bacteria eaters relationship and % of dorylaimid and criconematid were calculated, which show the differences between cultivated and natural habitat. The results, allow for inferences of possible conditions of structure loss in the rice cropping system; some instability in soil patches of natural habitat, and possible recovery within the system corn – soybeans rotation system trophic chains. This work is the first record of free-living nematodes in the soils of the Colombian well drained savannas as a tool for the recovery of degraded soils.
| Auteurs principaux: | , |
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| Format: | info:eu-repo/semantics/article biblioteca |
| Langue: | spa |
| Publié: |
Corporación Colombiana de Investigación Agropecuaria (Agrosavia)
2008
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| Sujets: | Maíz, Nematoda, Suelos cultivables, Transitorios, |
| Accès en ligne: | http://revista.corpoica.org.co/index.php/revista/article/view/105 http://hdl.handle.net/20.500.12324/33855 |
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