香料ゼラニウムの精油分泌機能に関する生理・生態学的研究 : 第11報収油方法の改善に関する研究 : 第12報収油率の人為的向上手段 : 収油率, 蒸散量, 葉温に及ぼすS.Gの効果

概要

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XI. Improvement in oil extraction method. It was found that the most suitable drying period was between 10 to 14 days, in which the weight of leaves had decreased to 1/3〜1/4 of the original. On the other hand, with over 20 days of drying the yield of oil began again to decrease. If the leaves were dried in the shade 10 to 14 days, the yield of oil may be somewhat increased as compared with fresh leaves. Especially drying proceses is recommendable in a sense of avoiding undesirable fermentation of leaves in pile during the summer season. There was no significant changes in the chemical composition of the essentiai oil due to the drying of leaves. The oil extracion by means of n-Hexane would not be economical. It would be advantageous to have prolonged hours of distillation during the hot summer day as in such a season after-distillation will yield more oil, but do not fix any definite number of hours of distillation for the whole year. XII. The effects of S. G sprinkling on the yield of oil, the transpiration and the leaf-temperature. S. G sprinkling is effective in increasing the percentange of oil yield. This seems to be brought about chiefly by a large amount of solar radiation absorbed on the leaf-surface.
日本作物学会の論文
1961-01-20