Abstract
In a study addressing composition and recovery of soil carbon following pasture installation on arable land, radiocarbon isotope ratios were measured in size- and density-separated soil organic matter (SOM) fractions in a pasture and maize plot. The average soil carbon age increased with depth from 444 yr in the 0-30-cm layer to 2456 yr in the 60-80-cm layer in the pasture soils, and from 42 to 1625 yr in the maize-cultivated soil. Weight fractionation of the macro-organic matter (size >150 mu m) in a light (density 1.37 g cm(-3)) resulted in markedly different ages for different fractions with ages increasing from 2 yr in the light fraction to >3000 yr in the heavy fractions. (13)C and (14)C (accelerator mass spectrometry (AMS)) isotope ratios in the
| Original language | English |
|---|---|
| Pages (from-to) | 1023-1031 |
| Number of pages | 9 |
| Journal | Radiocarbon |
| Volume | 40 |
| Issue number | 2 |
| Publication status | Published - 1998 |
| Event | 16th International Radiocarbon Conference - , Netherlands Duration: 1-Jun-1997 → … |
Keywords
- NATURAL ABUNDANCE
- CARBON TURNOVER
- GRASSLAND SOILS
- MATTER
- SIZE
- FRACTIONS
- RADIOCARBON
- BIOMASS
- N-15
- LOAM