サントニン含有Artemisia属植物の研究特にその栽培について (第8報)

クラムヨモギについて その8

抄録

1) Yield of crop of the second-year growth of Artemisia kurramensis QAZ., sown in the autumn, was comparable to that sown in the spring (Table I). This is in agreement with the result reported in Part III of this series and shows the possibility of cultivation of this plant by autumn sowing.
2) The season at which the santonin content reaches the maximum was in the early part of August, both in the first- and second-year growths (Tables I and III). It has been proved by tests during the past three years that there is no essential difference between the first- and second-year growths as to the period at which the santonin content reaches the maximum in the same year.
3) It was found that the rate of dead stocks after harvest was smaller when shoots are harvested in parts rather than as a whole. In some cases, partial harvesting raised the yield of crop to 70-99% of that from total harvesting of shoots (Table IV). This fact suggests the possibility of such a process for actual harvesting.
4) It is possible to carry out transplantation in the autumn for harvesting the second-year growth. This is to sow seeds in the spring, as early as possible, transplanting the seedlings during May in a provisional bed, and to plant them in the field during the autumn. By this means, a larger yield of crop was obtained although there was no significant difference in the santonin content from the plants sown in the autumn and transplanted in the field during the spring (Tables V to VIII).