Effects of conservation tillage on total and aggregated soil organic carbon in the Andes
| cg.coverage.region | Latin America | |
| cg.coverage.region | South America | |
| cg.creator.identifier | Marcela Quintero: 0000-0001-8107-7744 | |
| cg.identifier.doi | https://doi.org/10.4236/ojss.2013.38042 | en |
| cg.isijournal | ISI Journal | en |
| cg.issn | 2162-5360 | en |
| cg.issn | 2162-5379 | en |
| cg.issue | 08 | en |
| cg.journal | Open Journal of Soil Science | en |
| cg.reviewStatus | Peer Review | en |
| cg.subject.ciat | SOIL HEALTH | en |
| cg.subject.ciat | SOIL LANDSCAPES | en |
| cg.volume | 03 | en |
| dc.contributor.author | Quintero, Marcela | en |
| dc.contributor.author | Comerford, N.B. | en |
| dc.date.accessioned | 2014-11-12T13:42:25Z | en |
| dc.date.available | 2014-11-12T13:42:25Z | en |
| dc.identifier.uri | https://hdl.handle.net/10568/51505 | |
| dc.title | Effects of conservation tillage on total and aggregated soil organic carbon in the Andes | en |
| dcterms.abstract | Many Andisols of the Andes have been disturbed by traditional potato-based rotation agriculture disrupting soil structure, water retention capacity and organic matter content.This study was undertaken to investigate the contribution of conservation farming technology or reduced tillage in potato-based rotations in the Colombian Andes in order to rehabilitate total and aggregated soil organic C in disturbed organic matter-rich Andisols.Soils were sampled from farms with 7-year of reduced tillage and farms with conventional farming practices.Ultrasound energy was applied to samples to disrupt aggregation and total soil C was determined in order to investigate the amount of carbon held inside the aggregates of different soil size classes.Results indicated that reduced tillage in potato-based crop rotations increased the soil C concentration and average C content in the whole profile (≈117 cm depth) by 50 and 33% (1636 t C ha -1 vs. 1224 t C ha -1 ), respectively, as compared to conventional farming practices.Carbon content increased 177% in the subsoil (A2 horizon, 78 -117 cm depth, from 215 to 596 t•ha -1 ), although most of the soil C was in the A1 horizon (between 0 -78 cm average thickness, 1097 t•ha -1 ).These increases show that reduced tillage enhances C stores in Andisols which are already high in organic matter.In addition, C in aggregates represented more than 80% of the total organic matter and it was positively affected by conservation practices.The C increase was preferential in the smaller macroaggregates (<2 mm).The aggregate dispersion energy curves further suggested that C increase was occurring in microaggregates within the smaller macroaggregate fraction.Data suggested that smaller macroaggregates can be used in these soils to evaluate the influence of field management practices on soil C sequestration. | en |
| dcterms.accessRights | Open Access | |
| dcterms.bibliographicCitation | Quintero, Marcela; Comerford, Nicholas B. 2013. Effects of conservation tillage on total and aggregated soil organic carbon in the Andes. Open Journal of Soil Science. . | en |
| dcterms.extent | pp. 361-373 | en |
| dcterms.issued | 2013 | |
| dcterms.language | en | |
| dcterms.license | CC-BY-4.0 | |
| dcterms.publisher | Scientific Research Publishing, Inc. | en |
| dcterms.subject | soil conservation | en |
| dcterms.subject | tillage | en |
| dcterms.subject | potatoes | en |
| dcterms.subject | organic matter | en |
| dcterms.subject | carbon | en |
| dcterms.subject | carbon sequestration | en |
| dcterms.subject | soil structural units | en |
| dcterms.subject | labranza | en |
| dcterms.subject | papa | en |
| dcterms.subject | carbono | en |
| dcterms.subject | secuestro de carbono | en |
| dcterms.subject | unidades estructurales de suelos | en |
| dcterms.type | Journal Article |