十勝地方における耕地防風林の現況と更新方法について : 中札内のカラマツ・アカエゾマツ林帯の1例を中心に(会員研究発表論文)

概要

論文の詳細を見る
1. In Tokachi district, Hokkaido, Japan, there are nets of shelterbelts of Japanese larch, Larix kaempferi, younger than 35 years of age, about 70 m in width, for croplands against wind erosion and cool sea wind (Fig.1) 2. These larch belts, about 1000 trees/ha, 14 to 20 m in height and 20 to 30 cm in D.B.H, were damaged more at center than at windward margin by Typhoon No.15 in 1981 (Fig.2) 3.Patches and gaps wind-damaged have been reforested with Red yezo-spruce, Picea glehnii (Fig.2) and Todo-fir, Abies sachalinensis. 4. The spruce are growing vigorously, 120 cm in average height, 5 years of age, but trees of marginal part are damaged by cold wind (Fig.3). 5. These conifer belts may be mixed with Daimyo-oak, Quercus dentata, and other broad-leaved trees. 6. For safe regeneration, the combination of severancecutting and construction of road for tending should be the best method (Fig.4).
北方森林学会の論文
1989-03-01