ツバキ林の生産構造と物質生産量

概要

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Two pure stands (K-28,S-70) of Camellia japonica and a stand (K-32) of mixed evergreen hardwoods (Quercus glauca, C. japonica, etc.) , both some 60 years in age, Were studied at the Ise Shrine Forest in Mie Prefecture, Japan. Sixty eight sample trees were felled and weighed after the stratified clip technique. Relative growth relations between DBH and amounts of various tree organs were used for estimating the standing crops and growth increments of the living trees. The Camellia stands had a relatively small tree biomass (stem 113,branch 37.7,leaf 6.44 ton/ha in oven-dry wt.) , in spite of the fertile soil. Stem volume increment (5.31 m^3/ha・yr) and net production (10.0ton/ha・yr excl. roots) were also low, due to the small amount of leaves (LAI : 5.40 ha/ha) and to the rapid extinction of light in the canopy. In the mixed hardwood stand, on the other hand, tree biomass (stem 173,branch 44.8,leaf 6.66 ton/ha) , LAI (6.10ha/ha) , stem volume increment (12.8m^3/ha・yr) and net production (17.3ton/ha・yr) were all greater than in the Camellia stands, and more or less equal to the values obtained in other types of evergreen hardwood forest in Japan.
日本生態学会の論文
1965-08-01