21 シナアブラギリとナンキンハゼの育苗に就いて (第2報) : 苗畑仕立本数の検討

概要

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This paper is the result of experiment that was conducted on Aleurites Fordii and Sapium sebiferum for the purpose of finding out how many seedlings will properly be raised per unit area.1. With the increase in density of the plants, the seedlings the two kinds of trees mentioned above decrease in quality, and it is clear 1 section (10 plants per m^2) is best for individual seedlings. But usually the producing of seedlings of the greatest number possible is required in the field management. Therefore, it is desired to find the proper density of plants that will meet the requirment both in quality and quantity of seedlings.2. From such a view point concerning per unit area, the comparison between Table 1〜2 and 3 shows that the most density is 20 seedlings per m^2 for Aleurites Fordii and 40 seedlings for Sapium sebiferum.After all, it is sure that 20〜30 seedlings per m^2 is optimum number for both kinds of the trees.3. When the density of seedlings is over 60 per m^2,their stems become bent and thier roots-form deformed. This transformation yields much more in case of Sapium sebiferum than Aleurites Fordii. From this point, it is not too much to say that nurserying with over 50 or 60 per m^2 is not proper.
日本森林学会の論文
1952-04-25