13 アブラギリ及びナンキンハゼの育苗に就て : 第1報播種密度と苗木の生育

概要

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1. This research was hold on Aleurites Fordii and Sapium sebiferum, having purpose to study the relation between the thickness of sowing and the growth of seedling. And it is a part of investigation on the sylviculture of economic trees of special use. 2. The research was carried out at nursery of Saikyo Universisy ; from May, 1949 to January, 1950. After this, we are going to observe the growth of seedling after transplantation, continually. 3. The standing thickness of seedlings are thinner than the sowing thickness because of practical germination percent showed 46% (Aleurites) and 27% (Sapium). Then in this research, 60 seedlings which are standards of every sections, were selected. 4. The result of this research tells that the growth of Aleurites Fordii is best at V section, but IV section showed the nearest growth to V, too. Therefore, from the productive point of view per unit area ; 25 grains per m^2 is considered the most suitable. 5. Sapium sebiferum showed best result at E section, but from the same meaning with above mentioned considered that D section (100 grains per m^2) is the most suitable. 6. This research is the comparison of growth of seedling when the germination percent of both tree kinds are about 50〜60% (estimated). It is a matter of course that increase or decrease of germination percent brings about some change of suitable sowing thickness.
日本森林学会の論文
1951-02-25