| Autor: |
Idol, Travis W., Holzbaur, Kristen A., Pope, Phillip E., Ponder, Felix |
| Zdroj: |
Soil Science Society of America Journal; March 2002, Vol. 66 Issue: 2 p620-623, 4p |
| Abstrakt: |
Although contamination of litterbags by organic matter is potentially important, there are no standard methods to correct for it. Organic and mineral contamination of field‐incubated forest floor litterbags was investigated using the standard ash‐free dry mass (AFDM) correction and a correction based on increases in the mass of field‐incubated litterbags filled with undecomposable control material. After 120 d, mineral contamination of Oi horizon litter averaged 5.2% of initial litter mass in stands ranging from 7 to 100 yr since cutting. There were no consistent changes in mineral contamination of Oe horizon litter. The mass of nylon control material increased by an average of 22% of initial litter mass after 120 d. Decomposition rates of Oi and Oe litter corrected using increases in control bag mass were significantly higher than uncorrected or AFDM‐corrected rates. Forest stand age did not significantly affect mineral contamination, but mass gain after 120 d in the control bags was significantly higher in the 7‐yr‐old stand (32%) than in 13‐, 32‐, or 80‐ to 100‐yr‐old stands (17–20%). |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
|
Plný text