• Title/Summary/Keyword: overwintered stump

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Ecological Study on the Seed Germination and Emergence of Overwintered Stump of Bulrush(Scirpus juncoides Roxb.) (올챙고랭이(Scirpus juncoides Roxb.) 종자발아(種子發芽) 및 월동(越冬) 주기부(株基部)의 출아생태(出芽生態)에 관한 연구(硏究))

  • Guh, J.O.;Huh, S.M.
    • Korean Journal of Weed Science
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    • v.6 no.2
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    • pp.110-123
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    • 1986
  • To know the ecological pattern of bulrush (Scirpus juncoides Roxb.) seeds and overwintreed stumps in germination and sprouting responses as affected by different temperature (7 trt.), light intensity (5 trt.), shading intensity (S trt.), light quality (specturm spectrum; 6 trt.), soil acidity (7 trt.), stump sizea (weight base; 5 trt.), and molding depth (6trt.), respectively, this serial studies were conducted by use of growth chamber, incubator, Wagner pot and petri-dish. Most efficient treatment was obtained from 25-$35^{\circ}C$ temperature, higher light intensity in 2-11 klux range, 95% shading intensity, clear and yellow film for seeds/clear and blue film for stumps, soil pH 5.53, 3-4g stump weight, 0-5% wxygen concentration, 1 ㎝ flooding depth for seeds, and 1-1.5cm molding depth for seeds/0.5-1.0 cm molding depth for stumps, respectively, among others.

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Reproductive Growth of Seeds and Overwintered Stump of Bulrush (Scirpus juncoides Roxb.) (올챙고랭이(Scirpus juncoides Roxb.) 종실(種實) 및 월동주기부(越冬株基部)의 번식생장(繁殖生長)에 관한 연구(硏究))

  • Huh, S.M.;Guh, J.O.
    • Korean Journal of Weed Science
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    • v.7 no.1
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    • pp.35-44
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    • 1987
  • Differing in water conditions, the dry matter weight per plant was highest at 0 cm flooding depth, and was decreased at above 2 cm flooding depths. The shoot and spikes per pot developed best at flooding depths of 0 and 2 cm, but worst at -5cm or above 4cm flooding depths. The dry matter weight of shoots was linearly increased, but the weight of roots was sharply decreased according to high temperature after flower initation. The shoots and spikes per pot developed more effectively at 25$^{\circ}C$ than at 35 or 15$^{\circ}C$. The number of shoot and spike per pot were decreased according to higher shading. The effects of shading of 25-45% were not significantly small. The natural white and yellow spectra were the most effective to increase dry matter weight, shoots and spikes per pot. The dry matter weights of shoot and root per plant were not significantly different among at: 50 and 75% clay. The number of shoots were best and continuously increased at 75% clay, and the increments at 0 and 100% clays showed the lag period at early stage. The pattern of spikes was similar to shoots with less difference in various clay composition. The dry matter weight per plant in paddy field and upland field was basically similar. The numbers of shoot and spike were increased in response to increased fertilizer levels up to 20Kg per 10a of each component.

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