其他摘要：Beechnuts (Fagus crenata seeds) were evaluated as a local specialty in a snowy semi-mountainous area in Japan. After monitoring the production of beechnuts in climax (C), satoyama (S), and isolated (I) stands for 11–17 years, a good or medium crop was observed biennially, every 2–4 years, and once in 17 years, respectively. The beechnut embryos had higher protein and lower lipid contents than those of commercial walnut. The oxidative stability of embryonic oil from beechnut was greater than that from walnut. The estimated potential quantity of beechnuts in a good crop was ca. 8 ton (equivalent to ca. 8 million yen) in the largest satoyama beech forests (ca. 5.5 ha) in the study area. To use beechnuts sustainably, various strategies should be adopted for different types of stand: in C, fallen beechnuts should be collected from managed open sites; in S, beechnuts should be collected actively to promote the re-use of satoyama sites; and in I, beechnuts should not be collected, to conserve the beech population. Therefore, although beechnuts will be available with appropriate resource management, it is necessary to find a way to increase their added-value to sustain them as a local specialty.
关键词：ブナ林;ブナ堅果生産量;栄養成分;特産物;中山間地
其他关键词：beech forests;production of beechnuts;nutrient composition;local specialty;semi-mountainous area
