• Journal of Bio-Environment Control
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• v.5 no.2
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• pp.138-144
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• 1996

This experiment was conducted to decide appropriate nutrient concentration for beet soilless culture by different nutrient concentration treatment between before and after root enlargement. Yamazaki's solution for head lettuce was used 0.5, 1, 2, 4 strength for before root enlargement and 0.5, 1, 2, 4 strength was treated after root enlargement. Root weight was good in 0.5, 1, 2 strength treatment before, then change treatment to 4 strength after root enlargement. But 4 strength treatment after root enlargement increase pithiness and root cracking. Vitamin C contents was low in 0.5 and 4 strength treatments after root enlargement. Betaxanthin and betacyanin were involved high concentration in lower nutrient concentration after root enlargement despite the treatments of before root enlargement. Therefore 1, 2 strength before root enlargement and 2 strength after root enlargement treatments is recommendable for nutrient culture of beet.

• Journal of Sericultural and Entomological Science
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• v.33 no.2
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• pp.68-71
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• 1991

Mulberry cuttings from shoots of Shinkwangppong(Morus bombycis koidz.) had been callused in vermiculite separately at 15, 20, 25 and 30$^{\circ}C$ for 15 days before transplanting them in greenhouse to make clear the effect of temperature on root formation and growth is as follow. The buds of cuttings started sprouting in 4 and 6 days of callusing at 30 and 25$^{\circ}C$, respectively, reaching 100% budding in 10 and 15 days of callusing. Budding was delayed, however, at low temperature, showing 86% and 92% at 15 and 20$^{\circ}C$, respectively, in 15 days. Rooting from the cuttings was also accelerated at high temperature, showing 97-100% rooting at 25$^{\circ}C$ and 30$^{\circ}C$, in 15 days of callusing but no more than 93% at low temperature even in 35 days. Although high temperature increased root number and length after 15 days in callusing, no differences showed in the number and the weight at more than 20$^{\circ}C$ in 35 days of cuttings.

• Korean journal of applied entomology
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• v.10 no.1
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• pp.7-12
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• 1971

1. The number of Rhizoctonia solani, Pythium debaryanum, Fusarium and Trichoderma was detected by the modification of Boosails special plating method when ginseng seed bed was drenched with Captan, Difolatan, Zineb, Maneb and PCNB at weekly intervals. Pythium debaryanum Hesse was described for the first time on Panax ginseng in Korea. 2. The number of Rhizoctonia solani and Pythium debaryanum was decreased gradually as the geason Progressed, whereas that of Fusarium and rrichcderma was increased. 3, The number of Rhixoctonia solani was greatly reduced by PCNB, and soils treated with other fungicides generally showed less Rhizoctonie solani than in the control. The number of Pythium debaryanum was significantly reduced by Zineb, Maneb, followed by Captan and Difolatan. None of the fungicids reduced the number of Fusarium colonies in the fourth week. Effects of the chemicals on Trichoderma were not statistically significant. 4. More fresh weight of the seedling roots was obtained using Difolatan, Maneb and PCNB. Phytotoxicity was noted with Maneb, Zineb and Captan after the third treatment.

• Journal of Bio-Environment Control
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• v.15 no.4
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• pp.417-420
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• 2006

To investigated the dormancy of chicory (Cichorium intybus L.) for production of high quality rootstocks, growth characteristics and abscisic acid (ABA) contents was conducted. The accumulation hours below $5^{\circ}C$ in field was increased slowly from October 7 to December 3, but there after increased largely. The rootstock weights was increased from the end of October to December 3, there after was not changed to December 3. ABA contents within the rootstock was not changed from October 7 to December 3, and there was suddenly increased for two weeks to December 24. As results of the sudden changed date of accumulation hours below $5^{\circ}C$, stopped date and period of rootstock growth, and sudden changed period of ABA contents, chicory has internal dormancy for two weeks from December 3 and low temperature requirement hours for the dormancy breaking is about 240.

• Research in Plant Disease
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• v.20 no.2
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• pp.107-111
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• 2014

A greenhouse experiment was conducted to examine the effect of initial population density (Pi) of Helicotylenchus dihystera on six commercial tomato cultivars. Two-week-old tomato seedlings of six commercial cultivars were transplanted in d-10-cm clay pot and was inoculated with to give 0, 0.02, 0.2, and 2 nematodes/g soil. Plants were grown in a greenhouse for 60 days. Root and plant weights were unaffected but plant height declined only at inoculum level of 2 nematodes/g soil. At the highest initial population density (2 nematodes/g soil), plant height of tomato cv. Poseidon was reduced by 24%. Tomato cv. Hoyong produced the most nematodes with 7.0 nematodes/g soil and the least was tomato cv. Miniheuksu with 2.2 nematodes/g soil.

• FLOWER RESEARCH JOURNAL
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• v.17 no.4
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• pp.256-261
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• 2009

This study was carried out to examine the effects of cutting condition on the rooting and their subsequent growth of cut flower in plug cutting of summer-flowering chrysanthemum 'Iwanohakusen'. The more leaves were attached to the cutting, the higher shoot growth and rooting were. Shoot growth of cuttings was not affected by cutting length, but rooting was better in over 5 cm long cutting. Shoot growth was enhanced by increasing thickness of cutting, and 5.5 mm thick cutting was favored in rooting. When the many leaves were attached on the cutting, the length and weight of cut flower increased. Over 7 cm long cutting showed higher values in growth of cut flower and ray flower number. Cutting of 5.5 mm diameter showed more favorable growth of cut flower than the other treatments. Therefore, it is concluded that rooting of cutting and consecutive growth of cut flower was improved when 7 cm long and 5.5 mm diameter cutting with 4 leaves was used in plug cutting of chrysanthemum 'Iwanohakusen'.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2022.09a
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• pp.45-45
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• 2022

일당귀[Angelica acutiloba (Siebold & Zucc.) Kitagawa]는 산형과(Apiaceae), 당귀속(Angelica)에 속하는 다년생 식물로 일본이 원산지다. 국내에서는 참당귀(A. gigas)와 더불어 뿌리를 약용의 목적으로 재배하며, 잎과 줄기는 쌈채소로 이용하는 작물 중 하나이다. 본 연구의 목적은 일당귀에 대한 GA₃ 처리 및 온도에 따른 발아특성을 분석하여 약용 및 식용으로 활용도가 높은 일당귀의 재배 및 생산에 대한 기초자료로 사용함에 있다. 연구에 사용된 일당귀의 종자는 강원도 태백시에 위치하는 일당귀 재배농가에서 2021년 10월에 채종한 종자를 구입하여 실험에 사용하였고, 종자의 수분흡수율과 다온도 종자발아기를 활용하여 GA₃농도 4조건(50 ppm, 100 ppm, 500 ppm, 1,000 ppm), 온도 6조건(5 ℃, 10 ℃, 15 ℃, 20 ℃, 25 ℃, 30 ℃)에 따른 발아특성을 조사하였다. 연구결과 일당귀 종자 100립의 초기 무게 0.264 g에서 증류수 침지 2시간이 경과 후 약 60 %의 무게가 증가한 0.424 g으로 증가하였고, 이후 5 %내외의 수분흡수율을 보이며 48시간 경과 후 약 120% 증가한 0.587 g을 나타냈으며, 이후 72시간 경과 후 0.582 g으로 측정되어 일당귀 종자의 수분포화도는 약 120%정도 내외로 사료된다. GA₃농도 및 온도에 따른 발아율은 500 ppm의 GA₃농도에서 가장 높은 75.63 %의 발아율을 나타냈으며, 15 ℃와 20 ℃의 온도에서 가장 높은 77.6 %의 발아율을 나타냈다. 하지만 각각의 GA₃농도 및 온도에 따른 발아율은 500 ppm의 GA₃농도, 10 ℃의 온도 처리구에서 가장 높은 89.9 %의 발아율을 나타냈으며, 5 ℃의 온도 처리구에서는 모든 GA₃처리구에서 발아가 진행되지 않았다.

• Korean Journal of Food Science and Technology
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• v.42 no.3
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• pp.343-349
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• 2010

This investigation was conducted to assess the influence of Cirsium japonicum consumption on the plasma glucose and lipid profiles in streptozotocin (STZ)-induced diabetic rats. Diabetes mellitus was induced in male Sprague-Dawley rats weighing 230 g by injection of STZ into the tail vein at 45 mg/kg body weight. The rats were randomly assigned into four groups: a normal and STZ-control fed an AIN-93 diet group, and diabetic groups whose diets were supplemented with 10% Cirsium japonicum powder containing leaf or root for four weeks. To observe the effects of Cirsium japonicum in the animal model, the levels of glucose, cholesterol, HDL-cholesterol, triglyceride and free fatty acid in the plasma and the levels of glycogen in the tissue were determined after four weeks. Treatment of STZ-induced diabetic rats with leaf consumption significantly lowered the diet intake when compared with STZ-control rats. The relative weights of the liver and kidney differed significantly between the normal and diabetic groups. The weights of the kidneys in the leaf group were significantly lower than those in the STZ-control group. The level of hematocrit was also significantly lower in diabetic rats whose diets were supplemented with leaves when compared to those of STZ-control rats. The plasma glucose level was found to be significantly lower in the leaf group than the STZ-control group. The effect was significant after 2 weeks. The HDL-cholesterol levels increased in all of the diabetic experimental groups when compared to the STZ-control group. These results suggest that supplementation with Circicum japonicum leaves induced considerable hypoglycemic effect in STZ-induced diabetic rats and that these leaves may be useful for the management of diabetes mellitus.

• Korean Journal of Soil Science and Fertilizer
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• v.28 no.2
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• pp.165-175
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• 1995

To determine the effect of soil moisture stress on growth of barley and grain quality, a pot experiment was carried out for two barley varieties(Olbori and Chogangbori) by using large plastic pot(52cm in diameter and 55cm in depth) filled with sandy loam soil under rain-controlled open green house. By means of measuring soil water potential with micro tensiometer and gypsum block installed at 10cm in soil depth, soil moisture was controlled by sub-irrigation at several irigation points such as -0.05bar, -0.2bar, -0.5bar, -1.0bar, -5.0bar and -10.0bar in soil water potential. The lower soil water potential was controlled, the shorter length of stem and internode became, and the more narrow stem diameter was. Leaf area was significantly decreased when soil water potential was controlled lower than -0.5bar, although chlorophyll content of flag and first leaves was not changed so much. Weight of grain and ear was significantly decreased when soil water potential was lower than -5.0bar and the highest grain yield was obtaind in a plot where soil water potential was controlled at -0.2bar. However, the most efficient water use of Olbori and Chogangbori was obtained at -0.5bar and -1.0bar in water potentials, respectively. Crude protain content, maximum viscosity, consistency and ${\beta}$-glucan content of barley flour increased as soil water potential significantly decreased, especially below -5.0bar, but gelatination temperature decreased as soil water potential decreased.

• Research in Plant Disease
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• v.15 no.3
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• pp.242-247
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• 2009

To select rotation crops for control of clubroot of Chinese cabbage, potato, corn, soybean, onion and groundsel were planted in the field infected with clubroot pathogen (Plasmodiophora brassicae) in highland area in 2000. In comparison of economical efficiency among rotation crops, potato and onion gained about 16.9 and 14.9 times higher, respectively, than successive cultivation of Chinese cabbage. Resting spore densities of Plasmodiophora brassicae after harvesting rotation crops were in the range of $0.3{\sim}1.2{\times}10^3/g$ soil in all cultivated soils with rotation crops while that of successive Chinese cabbage cultivation soil was very high as much as $89.3{\times}10^3/g$ soil. And disease severity of Chinese cabbage clubroot was 4.9, 20.2, 24.4, 25.1 and 27.8% in onion, soybean, potato, corn, and groundsel cultivation plot, respectively, while that of successive Chinese cabbage cultivation plot was very high as 77.8%. Effect of rotation period of onion, potato, soybean on disease control was investigated from 2002 to 2005. Resting spore densities of Plasmodiophora brassicae after cultivating rotation crops were decreased until $2^{nd}$ year and maintained low density at $3^{rd}$ year in all plots, while that of successive Chinese cabbage cultivation plot was increased 2.6 to 23.6 times for three years. When Chinese cabbage was rotation-cultivated with potato, soybean and onion for three years, disease severities of Chinese cabbage clubroot decreased 92 to 4.4%, 72 to 10.4% and 72 to 12.2%, respectively, while that of successive Chinese cabbage cultivation plot maintained 100%. As the rotation period increased, the yields of Chinese cabbage increased, while that of successive Chinese cabbage cultivation plot decreased. At $3^{rd}$ year, Chinese cabbage with high quality could be much more produced 2,205, 2,493 and 2,476 g in potato, soybean and onion cultivation plot, respectively, than 95 g in successive Chinese cabbage cultivation plot.