| dc.contributor.author | Koutika, L. |
| dc.contributor.author | Andreux, F. |
| dc.contributor.author | Hassink, J. |
| dc.contributor.author | Chone, T. |
| dc.contributor.author | Cerri, C.C. |
| dc.date.accessioned | 2019-12-04T11:22:32Z |
| dc.date.available | 2019-12-04T11:22:32Z |
| dc.identifier.citation | Koutika, L.S., Andreux, F., Hassink, J., Choné, T. & Cerri, C.C. (1999). Characterization of organic matter in topsoils under rain forest and pasture in the eastern Brazilian Amazon basin. Biology and Fertility of Soils, 29(3), 309-313. |
| dc.identifier.issn | 0178-2762 |
| dc.identifier.uri | https://hdl.handle.net/20.500.12478/4024 |
| dc.description.abstract | In topsoils under forest and 7-, 12- and 17-year-old pastures, organic matter was characterized by analysing C and N distribution in particle-size fractions, the C decomposition rates of soil and particle-size fractions and by employing density-fractionation of macro-organic matter (>150 μm). The C and N associated with clay fractions increased with increasing age of pasture. The weight (%) of macro-organic matter and its heavy fractions (>1.37 g cm–3) also increased with increasing age of pasture. However, in a long-term incubation (100 days), these changes seemed to involve an increase in the C decomposition rate in the topsoil of the oldest pasture. Using the C decomposition rates of particle-size fractions, it appeared that silt and clay contributed differently to C decomposition in the whole soil. C associated with silt contributed to the C decomposition rate during the first 40 days of incubation, while C associated with clay contributed to C decomposition in the long-term incubation (after 40 days), especially when the clay fraction appeared to reach saturation point with respect to its ability to bind organic compounds and thus protect the soil from C loss. |
| dc.language.iso | en |
| dc.subject | Decomposition |
| dc.subject | Forest |
| dc.subject | Organic Matter |
| dc.subject | Pastures |
| dc.subject | Particle Size |
| dc.subject | Top Soil |
| dc.title | Characterisation of soil organic matter in the topsoils under rain forest and pastures in the eastern Brazilian Amazon Basin |
| dc.type | Journal Article |
| dc.description.version | Peer Review |
| cg.contributor.affiliation | Université Nancy |
| cg.contributor.affiliation | Université de Bourgogne |
| cg.contributor.affiliation | Research Institute of Agrobiology and Soil Fertility, The Netherlands |
| cg.contributor.affiliation | Universidade de São Paulo |
| cg.contributor.affiliation | International Institute of Tropical Agriculture |
| cg.coverage.region | South America |
| cg.coverage.country | Brazil |
| cg.isijournal | ISI Journal |
| cg.authorship.types | CGIAR and advanced research institute |
| cg.iitasubject | Soil Information |
| cg.iitasubject | Climate Change |
| cg.iitasubject | Soil Fertility |
| cg.accessibilitystatus | Limited Access |
| local.dspaceid | 99310 |
