Occurrence and nutritive quality of lowbush cranberry on the Kenai Peninsula, Alaska
The quantity and quality of lowbush cranberry (Vaccinium vitis-idaea L.) were studied on the Kenai National Moose Range, Alaska. Its frequency of occurrence and canopy coverage were highest in mature hardwood stands, intermediate in postburn regrowth stands of paper birch (Betula papyrifera) and spruce (Picea mariana and P. glauca), and lowest in mature spruce–hardwood stands. Its biomass, which was strongly correlated with canopy coverage (r = 0.976), was estimated as 1000–3000 kg per hectare in this area. In vitro dry matter disappearance (with moose rumen inocula) ranged from 41.2% in winter to 50.8% in summer, but the protein content (5.4–5.7%) did not change throughout the year. In winter, cell walls, acid-detergent fiber, and lignin increased slightly, while the concentration of eight detectable minerals decreased sharply.