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李成春,徐仁錫,宋東錫 順天大學校 1995 論文集 Vol.14 No.1
These experiment were conducted to lodging-related characteristics with different seeding dates in direct seeding of flooded paddy surface in rice plant. The number of seedlings per ㎡ were from 91 to 144 plants, and seedling ratios were from ranged from 61.7% to 91.8%. Days from seeding to flowering were shortened from 5 to 10 days by the later seeding dates. Heading dates of Daecheongbyeo, Donjinbyeo, Iipumbyeo and Seoanbyeo on June 9 showed slightly elapsed on the critical stable heading time from, August 28 to 29. The culm length was effective in longer culm varieties than semidwarf varieties. The degree field lodging(degree of lodging:0∼9<9:complete lodging) in Obongbyeo and S101 with semidwarf varieties were 0.33, whereas 0.45 in Dongjinbyeo with long culm. The lodging resistant varieties, Obongbyeo and S101, showed lower values of lodging index from 1.03 to 1.15 than those of lodging susceptible varieties, Daecheongbyeo and Palgongbyeo ranged from 1.42 to 1.70. Bending moment with leaf sheath were greater in lodging resistant varieties(Obongbyeo and S101), 1510.0∼1930.4 g·cm, than those in the lodging susceptible varieties (Daecheongbyeo and Palgong-byeo), 1127.2∼1287.6 g·cm. Therefore, it is recommended to select genotype with higher value of bending moment as well as breaking moment for breeding lodging resistant varieties.
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宋東錫,徐仁錫,許祥萬 順天大學校 農業科學硏究所 1995 農業科學硏究 Vol.9 No.-
Lodging has been recognized as one of major causes of yield reduction in rice culture. This experiment was conducted to investigate the relationships between physical characteristics of culm and lodging resistance of varieties in direct seeding on flooded paddy surface in rice plant. Ten varieties with different lodging resistance were grown in paddy fields and varietal occurrence of field lodging and lodging-related characteristics were observed. Seedling ratios were ranged from 73.7 to 74.6%, and number of seedlings per ㎡ were from 115 to 117 plants. Obongbyeo and S101 showed stronger resistance to field lodging whereas Daecheongbyeo and Palgongbyeo were susceptible to lodging. The lengths at the 3th, 4th and 5th internodes of semidwarf varieties were 2.3, 3.3 and 0.7㎝ shorter, respectively, than those of long culm varieties. The lodging resistant varieties, Obongbyeo and S101, showed lower values of lodging index from 1.11 to 1.15 than those of lodging susceptible varieties, Daecheongbyeo and Palgongbyeo ranged from 1.65 to 1.70. Bending moment with leaf sheath were greater in lodging resistant varieties, 1510.0∼1691.7 g·㎝, than those in the lodging susceptible varieties, 382.8∼557.1 g·㎝. Therefore, it is recommended to select a genotype with lower value of lodging index as well as higher value of bending moment for breeding lodging resistant varieties.
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Fusarium oxysporum 眞菌에 의한 百合科 菜蔬類의 乾腐病
徐仁錫,宋東錫 順天大學校 1994 論文集 Vol.13 No.1
百合科 菜蔬類에 乾腐病을 일으키는 病原을 調査하기 위하여 마늘, 양파, 대파로 부터 Fusarium 屬 3菌株를 각각 분리하여 病原性을 檢定하고 동정하였다. 分離된 病原菌은 人工接種에 의한 病原性 檢定 實驗에서 마늘, 양파 및 대파에 전형적인 病原性을 나타내었으며, 일부 菌株는 부추와 감자애도 輕微한 病原性을 나타내었으나,오이, 토마토, 수박, 무에는 病原性이 없었다. 이 病原菌은 Fusarium oxysporum으로 확인되었는데, 大型 및 小型 分生胞子의 크기는 각각 8.0-15.0×3.0-4.5m와 4.0-6.0×2.0-2.5m였다. 마늘에서 分離된 F101은 마늘에서 높은 병진전을 나타내었으나, 양파에서 分離된 F102는 양파와 대파에서 모두 가장 높은 병진전을 나타내었다. □This experiment was conducted to investigate the casual organism of basal rot disease in several Lilliaceae vegetables. Theree isolates of Fusarium sp. from diseased garlic onion and welsh onion caused typical symptoms on garlic, onion and welsh onion. Some of the isolates caused mild symptoms on leek and potato, but they showed no symptom on cucumber, tomoto, watermelon and radish by artificial inoculation for pathogenicity test. They were identified as Fusarium oxysporum and the sizes of micro-and macroconidia were 4.0-6.0x2.0-2.5m and 8.0-15.0x3.0-4.5m. F101 isolated from garlic was highly virulent on garlic, but F102 isolated from onion was more virulent on onion and welsh onion than the other two isolates.
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