| Autor: |
Jarvis, S.C., Hatch, D.J., Lovell, R.D. |
| Zdroj: |
Nutrient Cycling in Agroecosystems; May2001, Vol. 59 Issue 3, p219-225, 7p |
| Abstrakt: |
An improved field sampling method for measuring denitrification and mineralization, based on square-section soil cores enclosed in a specially constructed incubation box is described. Comparisons with an established method, based on conventional (cylindrical) soil cores were made using two contrasting soil types. In a well-drained soil, similar rates of denitrification were obtained with either method, but rates were consistently lower using the established method in a poorly-drained soil, both in the short-term and over an extended period. Rates of mineralization were also similar with the two methods in the well-drained soil, but in the poorly-drained soil, rates were significantly higher using the established method. The box method was considered overall to give more reliable estimates of these soil processes in a poorly-drained soil, especially when the soil water content approached field capacity. Better soil structure was maintained with minimal disturbance to the natural soil aeration using square-section cores. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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