ISSN:
1435-0661
Source:
Springer Online Journal Archives 1860-2000
Topics:
Geosciences
,
Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
Notes:
2 efflux) and the wet alkali method (NaOH) was used for laboratory mineral soil respiration. Soil temperature and moisture content were also measured. Harvesting significantly (P = 0.05) increased in situ respiration during most sampling periods. This effect was attributed to an increase in live root and microflora activity associated with postharvesting revegetation. In situ respiration increased exponentially (Q10 relationship) as treatment soil temperatures increased (mean range 8.3-29.1°C), but followed a parabolic-type pattern through the range of soil moisture measured (mean range 10.4-31.5%). Mean rates of laboratory mineral soil respiration measured during the study were unaffected by cutting treatment for most sampling sessions. Overall, the mean rate of CO2 efflux in the clearcuts (7.15 g CO2 m-2 d-1) was significantly higher than that in the partial cuts (5.95 g CO2 m-2 d-1), which in turn was significantly higher than that in the controls (4.95 g CO2 m-2 d-1). Mass balance estimates indicate that these treatment differences will have little or no long-term effect on C sequestration of these managed forests.
Type of Medium:
Electronic Resource
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