1 0 0 0 OA センブリの栽培研究(第1報) : 発芽について
The methods of cultivation of Senburi-plant are not made clear yet. As one of the difficulties of cultivation is concerned with seed germination, authors studied the effects of soil moisture and amount of light on the germinability of seeds, using various nets which have different degrees of light-inter-ception. Germination test carried out in 1973 and 1974. Seeds were sown on the beds covered with above-mentioned nets in the shape of tunnels. The germinating ability of old seeds were tested, too. Tunnel covering of nets could prevent the penetration of light and wind into the seed bed, and then, soil moisture were held in stable conditions. Covering with Kurare-victoria lawn Black No. 600 and Daionet Black No. 600 of which the rates of light-interception were 50% and 50% respectively, were most suitable for the seed germination. When the rates of light-interception were higher than above, the germination percentages were worse and seeds germinated slowly, according to the low temperature of soil which occurred by the lack of the light, in spite of abundance of soil moisture. The plots of no cover and covering with Kurare-victoria lown White No. 300 of which the rate of light-interception was 23% showed the worst germination, soil moisture being unstable. Seeds stored in the natural seasoning did not germinate at all next year. But, some of seeds sown in the soil which did not germinate in the 1 st year germinated next year.