抄録
Six species of evergreen broad-leaved trees, namely Litsea japonica (Thunb.) Juss., Neolitsea sericea (Blume) Koidz., Machilus thunbergii Siebold & Zucc., Daphniphyllum teijsmannii Zoll. ex Kurz, Lithocarpus edulis (Makino) Nakai, Camellia japonica L., and Japanese black pine, Pinus thunbergii Parl., were planted on a sand dune in Shimane prefecture in 2005. The mortality of Japanese black pine was 20% of the planted trees in the seventh year after planting. On the contrary, the mortality of evergreen broad-leaved trees was 60%-90% of the planted trees in the fourth year. The main mortality factors were severe drought and high temperatures during the summers. It is necessary to take countermeasures against drought and high temperatures in the summers when these evergreen broad-leaved trees are planted on sand dunes in Shimane prefecture. Japanese black pine might play the role of nurse trees for the evergreen broad-leaved trees.
