Development of foliage biomass of young spruce and beech stands in the mountain water balance research area
2009
Kantor, P.,Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Lesnicka a Drevarska Fakulta | Sach, F.,Vyzkumny Ustav Lesniho Hospodarstvi a Myslivosti, Opocno (Czech Republic) | Cernohous, V.,Vyzkumny Ustav Lesniho Hospodarstvi a Myslivosti, Opocno (Czech Republic)
The investigation of foliage biomass development including the leaf area index (LAI) and the growth of spruce and beech stands in the juvenile stage (age 1 to 21 years) represents a special complementary study to a long-term research of water balance components on the experimental forest hydrology area Destne Mountainside, Orlicke hory Mts. (Czech Republic) at the altitude of 900 m on a clear-felled area. In 1982 the spruce plantation was established at 1.5 x 1.5 m spacing (4,600 plants/ha) and the beech plantation at 1.0 x 1.0 m (10,000 plants/ha). Two improvement fellings were carried out (1995 and 2001) in the spruce stand and none in the beech stand. In 2002, some 1,550 spruce trees/ha (mean height 10.1 m) and 7,440 beech trees/ha (mean height 4.8 m) were recorded. At the end of the first vegetation season in 1982, the dry matter (DM) of foliage in spruce and beech stands amounted to 35 and 70 kg/ha, respectively. Five years later, these values increased to 770 and 360 kg/ha, respectively. At a stand age of 21 years, foliage DM was determined to be 11,940 kg/ha for spruce trees and 3,050 kg/ha for beech trees. At the same time, LAI was calculated to be 5.55 and 5.94, respectively. The method of foliage biomass quantification, based on the determination of foliage DM of mean sample trees and stand density, enabled to acquire complementary data usable in the long-term research of the water regime and simultaneously to provide information on the potential of biomass production and LAI value of both tree species.
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