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. E...

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Autores Principales: Leguízamo, María Claudia, Parada, Julio C.
Formato: Artículo (Article)
Lenguaje:Español (Spanish)
Publicado: Corporación Colombiana de Investigación Agropecuaria (Agrosavia) 2018
Materias:
Acceso en línea:http://hdl.handle.net/20.500.12324/33855
id ir-20.500.12324-33855
recordtype dspace
spelling ir-20.500.12324-338552020-07-08T21:23:59Z Soil nematodes of the corn-soy rotation system and adjacent natural habitats of the Colombian well drained savannahs (Meta department) Nematodos del suelo en el sistema maíz–soya y en hábitats naturales adyacentes de la Altillanura colombiana (Meta) Leguízamo, María Claudia Parada, Julio C. Maíz Nematoda Suelos cultivables Transitorios 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.  Se describe la estructura de la comunidad de nematodos en muestras de suelos de la Altillanura colombiana procedentes de hábitats cultivados con arroz y el sistema maíz-soya, y hábitats naturales de bosque nativo adyacentes a los agroecosistemas mencionados. A tal fin, se colectaron 240 muestras de suelo, 86% de áreas cultivadas y 14% en áreas naturales; para la extracción de los nematodos se utilizó el elutridador Oostenbrink y para su identificación, claves morfológicas que incluyeron caracteres morfométricos y diagnósticos. Los taxa identificados se asignaron a grupos tróficos a nivel de Familia. A partir de las poblaciones obtenidas, se calcularon los índices de diversidad de Shanon, de riqueza de Simpson, de madurez total (mMI), de madurez (IM), de parásitos de plantas, la relación fungívoros/bacterióvoros, y los porcentajes de dorylaimidos y criconematidos, los cuales muestran diferencias entre hábitats naturales y cultivados. Los resultados permiten determinar posibles condiciones de pérdida de estructura en la cadena trófica del cultivo de arroz, ligera inestabilidad en suelos de parches de hábitat naturales, y una posible recuperación de la cadena trófica en el sistema maíz–soya. Este trabajo constituye el primer registro de nematodos de vida libre en suelos de la Orinoquía colombiana y propone la caracterización de poblaciones de nematodos en los estudios de calidad de hábitat como fundamento de procesos de recuperación de suelos.    Maíz 2018-11-06T20:41:23Z 2018-11-06T20:41:23Z 2008 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://revista.corpoica.org.co/index.php/revista/article/view/105 10.21930/rcta.vol9_num1_art:105 http://hdl.handle.net/20.500.12324/33855 reponame:Biblioteca Digital Agropecuaria de Colombia repourl:https://repository.agrosavia.co instname:Corporación colombiana de investigación agropecuaria AGROSAVIA spa http://revista.corpoica.org.co/index.php/revista/article/view/105/106 application/pdf Meta Colombia Corporación Colombiana de Investigación Agropecuaria (Agrosavia) Corpoica Ciencia y Tecnología Agropecuaria; Vol 9 No 1 (2008); 61-65 Corpoica Ciencia y Tecnología Agropecuaria; Vol. 9 Núm. 1 (2008); 61-65 revista Corpoica Ciência e Tecnologia Agropecuária; v. 9 n. 1 (2008); 61-65 2500-5308 0122-8706 10.21930/rcta.vol9-num1
institution Agrosavia
collection DSpace
language Español (Spanish)
topic Maíz
Nematoda
Suelos cultivables
Transitorios
spellingShingle Maíz
Nematoda
Suelos cultivables
Transitorios
Leguízamo, María Claudia
Parada, Julio C.
Soil nematodes of the corn-soy rotation system and adjacent natural habitats of the Colombian well drained savannahs (Meta department)
description 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. 
format Artículo (Article)
author Leguízamo, María Claudia
Parada, Julio C.
author_facet Leguízamo, María Claudia
Parada, Julio C.
author_sort Leguízamo, María Claudia
title Soil nematodes of the corn-soy rotation system and adjacent natural habitats of the Colombian well drained savannahs (Meta department)
title_short Soil nematodes of the corn-soy rotation system and adjacent natural habitats of the Colombian well drained savannahs (Meta department)
title_full Soil nematodes of the corn-soy rotation system and adjacent natural habitats of the Colombian well drained savannahs (Meta department)
title_fullStr Soil nematodes of the corn-soy rotation system and adjacent natural habitats of the Colombian well drained savannahs (Meta department)
title_full_unstemmed Soil nematodes of the corn-soy rotation system and adjacent natural habitats of the Colombian well drained savannahs (Meta department)
title_sort soil nematodes of the corn-soy rotation system and adjacent natural habitats of the colombian well drained savannahs (meta department)
publisher Corporación Colombiana de Investigación Agropecuaria (Agrosavia)
publishDate 2018
url http://hdl.handle.net/20.500.12324/33855
_version_ 1672081178356613120
score 11,151152