Short-term variation in aggregation and particulate organic matter under crops and pastures
Short-term changes in soil aggregation, total and particulate organic C and N were studied in cropping and pasture systems of the Brazilian savannas, also known as the Cerrados. Furthermore, the concepts of a hierarchical aggregate structure and of the interaction of soil structure with particulate...
| Autores principales: | , , , , |
|---|---|
| Formato: | Capítulo de libro |
| Lenguaje: | Inglés |
| Publicado: |
International Center for Tropical Agriculture
1999
|
| Materias: | |
| Acceso en línea: | https://hdl.handle.net/10568/55129 |
| _version_ | 1855533623277518848 |
|---|---|
| author | Freibauer, A. Westerhof, R Ayarza, Miguel Angel Silva, J.E. da Zech, W. |
| author_browse | Ayarza, Miguel Angel Freibauer, A. Silva, J.E. da Westerhof, R Zech, W. |
| author_facet | Freibauer, A. Westerhof, R Ayarza, Miguel Angel Silva, J.E. da Zech, W. |
| author_sort | Freibauer, A. |
| collection | Repository of Agricultural Research Outputs (CGSpace) |
| description | Short-term changes in soil aggregation, total and particulate organic C and N were studied in cropping and pasture systems of the Brazilian savannas, also known as the Cerrados. Furthermore, the concepts of a hierarchical aggregate structure and of the interaction of soil structure with particulate organic matter (POM) available for temperate soils were evaluated and modified for tropical Oxisols. The results showed that Oxisol peds (>2 mm) were sensitive to land use and subject to significant seasonal turnover, indicating a similar behavior as in temperate soils. Three POM fractions were distinguished: (1) free POM situated in the free soil pore space, (2) easily accessible POM, loosely bound in peds and introduced in this study, and (3) occluded POM, which was not studied. Free and easily accessible POMs were important active C pools and increased with human activity. The ratio of free to easily accessible POMs could clearly characterize the different land-use systems. |
| format | Book Chapter |
| id | CGSpace55129 |
| institution | CGIAR Consortium |
| language | Inglés |
| publishDate | 1999 |
| publishDateRange | 1999 |
| publishDateSort | 1999 |
| publisher | International Center for Tropical Agriculture |
| publisherStr | International Center for Tropical Agriculture |
| record_format | dspace |
| spelling | CGSpace551292025-10-28T10:12:08Z Short-term variation in aggregation and particulate organic matter under crops and pastures Freibauer, A. Westerhof, R Ayarza, Miguel Angel Silva, J.E. da Zech, W. soil structure nitrogen content carbon soil organic matter pastures oxisols savannas estructura del suelo contenido de nitrógeno carbono materia orgánica del suelo pastizales oxisoles sabanas Short-term changes in soil aggregation, total and particulate organic C and N were studied in cropping and pasture systems of the Brazilian savannas, also known as the Cerrados. Furthermore, the concepts of a hierarchical aggregate structure and of the interaction of soil structure with particulate organic matter (POM) available for temperate soils were evaluated and modified for tropical Oxisols. The results showed that Oxisol peds (>2 mm) were sensitive to land use and subject to significant seasonal turnover, indicating a similar behavior as in temperate soils. Three POM fractions were distinguished: (1) free POM situated in the free soil pore space, (2) easily accessible POM, loosely bound in peds and introduced in this study, and (3) occluded POM, which was not studied. Free and easily accessible POMs were important active C pools and increased with human activity. The ratio of free to easily accessible POMs could clearly characterize the different land-use systems. 1999 2015-01-28T14:17:27Z 2015-01-28T14:17:27Z Book Chapter https://hdl.handle.net/10568/55129 en Open Access International Center for Tropical Agriculture Freibauer, Annette; Westerhof, Roelof; Ayarza, Miguel Angel; Silva, José Eurípides da; Zech, Wolfgang. 1999. Short-term variation in aggregation and particulate organic matter under crops and pastures. In: Thomas, Richard J.; Ayarza, Miguel Angel (eds.). Sustainable land management for the oxisols of the Latin American savannas: Dynamics of soil organic matter and indicators of soil quality. Centro Internacional de Agricultura Tropical (CIAT), Cali, CO. p. 77-88. (CIAT publication no. 312) |
| spellingShingle | soil structure nitrogen content carbon soil organic matter pastures oxisols savannas estructura del suelo contenido de nitrógeno carbono materia orgánica del suelo pastizales oxisoles sabanas Freibauer, A. Westerhof, R Ayarza, Miguel Angel Silva, J.E. da Zech, W. Short-term variation in aggregation and particulate organic matter under crops and pastures |
| title | Short-term variation in aggregation and particulate organic matter under crops and pastures |
| title_full | Short-term variation in aggregation and particulate organic matter under crops and pastures |
| title_fullStr | Short-term variation in aggregation and particulate organic matter under crops and pastures |
| title_full_unstemmed | Short-term variation in aggregation and particulate organic matter under crops and pastures |
| title_short | Short-term variation in aggregation and particulate organic matter under crops and pastures |
| title_sort | short term variation in aggregation and particulate organic matter under crops and pastures |
| topic | soil structure nitrogen content carbon soil organic matter pastures oxisols savannas estructura del suelo contenido de nitrógeno carbono materia orgánica del suelo pastizales oxisoles sabanas |
| url | https://hdl.handle.net/10568/55129 |
| work_keys_str_mv | AT freibauera shorttermvariationinaggregationandparticulateorganicmatterundercropsandpastures AT westerhofr shorttermvariationinaggregationandparticulateorganicmatterundercropsandpastures AT ayarzamiguelangel shorttermvariationinaggregationandparticulateorganicmatterundercropsandpastures AT silvajeda shorttermvariationinaggregationandparticulateorganicmatterundercropsandpastures AT zechw shorttermvariationinaggregationandparticulateorganicmatterundercropsandpastures |