Mass Propagation Method from the Cutting of Three Dipterocarp Species

概要

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The geographic distributions of Castanopsis sieboldii and Castanopsis cuspidata overlap each other on the Pacific coast of Japan, but on the Japan Sea coast C. sieboldii tends to dominate at similar temperatures. The authors attempted to explain this phenomenon by analyzing the effects of climatic factors. Nuts were collected from the Pacific and Japan Sea coasts of the Kinki and Chugoku districts, and the nut characteristics and the number of layers of epidermis in the leaves of the seedlings were investigated. The distribution of C. sieboldii and C. cuspidata was satisfactorily explained by a multiple regression equation that was developed using three climatic factors : maximum snow depth in winter, lowest temperature in the coldest month, and annual mean temperature, out of fourteen such factors that were considered. The estimated distribution of C. sieboldii and C. cuspidata from the multiple regression equation agreed with 66.2% of the actual observations.
日本森林学会の論文
2002-05-16