28.天然生海岸防風林の解析 : 天塩営林署稚咲内(会員研究発表講演)

概要

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The Wakasakinai sand-dunes are situated at the west coast of northern Hokkaido, and there are many marshes among them. On the first dune toward the prevailing wind, 1,300 m apart from the sea, grow the low, wind-swept forest of Japanese oak, Quercus mongolica var. grosseserrata, 5 m high at leeward. This protects the main Todo-fir forests. Todo-fir, Abies sachalinensis, grow on the second to last dunes, and these regenerate naturally. The width is about 1,500 m, and the heights are 8 to 12 m (windward) and more than 20 m (leeward). Among the forests grow Quercus, Acer mono, Acanthopanax sciadophylloides, and a few other species. The forests suggest the establishment method of artificial shelterbelt at the vicinity : 1. The narrowest limit of shelterbelt is 100 m wide. 2. It is good to construct a wind-dyke and to establish pioneer tree belts at windward. 3. As a main species Abies is planted with several deciduous trees. These will grow 10 m high at leeward, in 20 years.
北方森林学会の論文
1969-01-16