朝鮮産莞草(ワングル)の特性と作物学的分類に関する研究 : 第5報 朝鮮産莞草 C. Iwasakii M. と C. glomeratus L.との特性(種子の発芽最低温度)

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  • Studies on the characteristics and classification of a crop named “Wangul” (Cyperus lwasakii M. and C. glomeratus L.) in Korea. V. The characteristics of C. Iwasakii, M. and C. glomeratus L. (Minimum tempeature of seed germination)

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“Shititoui”, Cyperus tegetiformis Roxb. (C. malacelesis Lam.), propagates by underground stems and cannot propagate by seeds, but “Wangul” (Cyperus lwasakii M. and C. glomeratus L.) propagates very well by seeds. So, the minimum temperature of seed germination of Wangul is one of the important characteristics to consider seriously in cultivation. In order to know the minimum temperature of Wangul, germination tests were carried out in 1941-43, at the South Branch of the Chosen Government Agri. Exp. St., using such eight varieties such as Pukchon (S. Hamgyeng pref. of North Korea) . Kanghwa (Kyengkwi pref. of Middle Korea) and Uisong (N. Kyengsang pref. of South Korea) differing in harvest period (early or late) and in the form of the stem. By using weighing bottles with a diameter of 3cm and height of 5cm containing 4cm deep river sand and 3.5cm of deep water, the experiment was carried out in a thermostat at 30°C, considered to be the optimum temperature, and at 10-18°C. Examination of the number of sprouting seeds was carried out at 10a. m. every day. The last germination test was on the 14th day. The result obtained was that the minimum temperature for seed germination of “Wangul” is 13`15°C.

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