Analysis of the growth of hinoki (Chamaecyparis obtusa) and invading broad-leaved trees in an unsuccessfully managed plantation: A case study of a 24-year-old hinoki plantation in Miyama, Kyoto prefecture [Japan]
2003
Shimada, S. (Kyoto Univ. (Japan)) | Takeuchi, M.
The volume growth of trees in an unsuccessfully managed plantation of Hinoki (Chamaecyparis obtusa) invaded by broad-leaved trees was analyzed in Miyama. Kyoto Prefecture. Although the volume growth rate of more than half of the broad-leaved trees stopped increasing or began to decrease just after they reached the canopy, Hinoki continued to increase at a constant rate. This suggests that Hinoki will eventually predominate over the broad-leaved trees in the upper stratum. The factors affecting the decline in the vitality of the broad-leaved trees included not only competition between Hinoki and the broad-leaved trees, but also competition among broad-leaved trees that originated as sprout stems from the same individuals. One third of the upper stratum trees was broad-leaved trees including valuable species. Most of the Hinoki had been damaged by snow or debarked by bears. Therefore, it was suggested that this forest should be managed to be converted to a forest in which broad-leaved trees are dominant. To make the broad-leaved trees more dominant, thinning of the Hinoki and cutting of the broad-leaved trees and some stems in coppicing trees in the area with dense individuals are required.
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