Distribution and fruit yield of Actinidia kolomikta (Maxim. et Rupr.) Maxim. in the northern part of Chuo Alps, Japan

概要

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In order to obtain basic ecological information on Actinidia kolomikta, as an initial step to use it as a local product, we collected strains in the northern part of Chuo Alps, Japan. The distribution area and habitat environment, as well as variation of fruit morphology and yield were investigated. We collected 10 strains at an elevation of 1420 to 1830 m. Each habitat was located on a slope facing a river, mostly at the edge of a riparian forest. The average fruit weight of 10 strains was 1.09 g (0.35-1.65 g) and there was little variation in fruit shape. Allometric analyses revealed a high correlation of average fruit weight with fruit length and diameter. Fruit yield shown by the efficiency of gathering,which is expressed as a logarithmic value of the number of collectable fruits per hour,ranged from 0.04 to 2.22 (1.1-165.3 g･hr-1). Both average fruit weight and maximal fruit yield were only a quarter of those in A. arguta in the same research area. The relationship between elevation and average fruit weight and between elevation and fruit yield, showed a convex curve with an optimal elevation at around 1600 m.
2010-03-26