Canopy Cover Effects on Cellulose Decomposition in Oak and Pine Stands

概要

論文の詳細を見る
Cellulose mass loss was measured for four levels of canopy cover, i.e.. clearcut, 25%, 75%, and uncut, in northern red oak (Quercus rubra) and red pine (Pinus resinosa) stands in northern Lower Michigan, USA. Cellulose mass loss was more rapid in the clearcutand 25% canopy cover treatments than in the 75% canopy cover and uncut treatments. After 4 month incubation of cellulose filterpapers, mass loss rates averaged 75.2% in the clearcut, 56.3% in the 25% canopy cover, 46.9% in the 75% canopy cover, and 45.7%in the uncut stands. For the clearcut and the 25% canopy cover treatments, cellulose mass loss in the mineral soil layer was significantly higher than in the forest floor after 2 and 4 months of incubation, while cellulose mass loss of the uncut treatment was significantly lower in the soil layer than in the forest floor after 4 months of incubation. Cellulose mass loss was not significantly different between the oak and the pine stands (p>0.05), but cellulose mass loss rates in other canopy cover treatments except for theclearcut were generally higher in red oak stands than in red pine stands. These results suggest that canopy manipulation increasescellulose decomposition and may stimulate nutrient cycling process in canopy removal stands.
一般社団法人日本森林学会の論文
2000-08-16