• Title/Summary/Keyword: 추대율

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Effect of Seedling Size and Low Temperature on Growth and Bolting in Angelica gigas Nakai (참당귀묘의 크기 및 저온처리가 생육과 추대에 미치는 영향)

  • 유홍섭;강병화;김영국;이승택
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.42 no.2
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    • pp.196-201
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    • 1997
  • This study was carried out to understand the effect of low temperature treatment and seedling size on growth and bolting in Angeljca gjgas. Bolting rate increased as period of low temperature increased and bolting rate of control was lower than that of low temperature treatment. In low temperature treatment with seedling size, the smaller seedling size, the higher bolting rate. Period from transplanting to bolting was reduced with low temperature treatment extended and large seedling. The plant height, position of bolting leaf and number of developing leaf were decreased with low temperature treatment extended and large seedling, respectively, There was a highly significant negative correlation between bolting rate and number of developed leaves before bolting and number of developed leaves in growth to first bolting but positive correlation in late growth, respectively.

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Effect of Temperature and Daylength on Growth and Bolting of Angelica gigas NAKAI (온도(溫度) 및 일장조건(日長條件)에 따른 참당귀 생육특성(生育特性)과 추대현상(抽臺現象))

  • Ahn, Sang-Deuk;Yu, Chang-Youn;Seo, Jeong-Sik
    • Korean Journal of Medicinal Crop Science
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    • v.2 no.1
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    • pp.20-25
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    • 1994
  • This study was carried out to investigate the effect of temperature and daylength on the bolting of Angelica gigas Nakai for decreasing the rate of bolting.Seedlings were transplanted on early December to the PVC pot(1 /1000) in the greenhouse con­trolled the temperature of 15, 20 and $25^{\circ}C$, and the daylength of 8, 12, and 16hrs. Growth of aerial parts, bolting rate and root characteristics of A. gigas were investigated. Seedlings of A. gigas untreated with low temperature were nomally emerged, bolted and flowered in maturing stage. In this results, it was assumed that A. gigas was low sensitive to low temperature. The early growth stage was good at $20^{\circ}C\;and\;25^{\circ}C$, but the late growth was effective at $15^{\circ}C\;and\;20^{\circ}C$. The bolting rate was the highest at $20^{\circ}C$ while the root weight was the lowest. Although the bolting rate was high at $15^{\circ}C$, the yield was increased by the delay of bolting and flowering stage. The bolting rate was increased in the longer daylength and showed more sensitive to the daylength condition than to the temperature. Thus, A. gigas cultivated in gully field with cool temperature or under the shading light could be reduced could the bolting rate.

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Influence of Seedling Weight on Agronomic Characters and Their Relation with Bolting in Angelica gigas Nakai (참당귀 묘 중양별 생육특성과 추대와의 관계)

  • 안상득;유창연;조동하
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.39 no.5
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    • pp.426-430
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    • 1994
  • To establish the proper size of seedling of A. gigas, different weight of seedlings were used for this study. Agronomic characters including plant height, number of leaf, leaf length, number of inflorescence, fresh weight and rate of bolting of the aerial parts, root length, root diameter, number of lateral root and root weight of the underground parts were determined and correlation coefficients among them were estimated. Growth of A. gigas showed the significant vigor for all the characters of the aerial parts along with increasing of seedling weight, but root weight in yield decreased in proportion to increasing of seedling weight due to lignification of the root tissue. When the smaller seedlings were transplanted, bolting rates decreased to about 16% as compared with the traditional size of seedlings. Correlation coefficients between aerial and root characters in A. gigas were negative, and the characters such as plant height, number of leaf, number of inflorescence and fresh weight per plant showed highly significant correlation with the rate of bolting which is one of the characters having great influence on yield.

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Plant Growth and Bolting Affected by Transplanting Time in Angelica gigas (참당귀의 정식시기에 따른 생육 및 추대)

  • Yu, Hong-Seob;Jo, Jae-Seong;Park, Chung-Heon;Park, Chun-Geon;Sung, Jung-Sook;Park, Hee-Woon;Seong, Nak-Sul;Jin, Dong Chun
    • Korean Journal of Medicinal Crop Science
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    • v.11 no.5
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    • pp.392-396
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    • 2003
  • This study was carried out to determine plant growth and bolting characteristics of Angelica gigas. Three varieties and/or lines Manchu bolting resistant variety, AGJ90-1 medium type line, and bolting Jinbu local were used for field trial in Suwon. FIve different transplanting times were applied on March 25, April 5, April 15, April 25, and May 5th. Survival rate was decreased by the delayed transplantation and it affected after April 25th respectively. Plant growth by the early transplantation showed the best growth during the beginning stage and recognized signifiquence but not by the late transplantation. Bolting rate revealed severe different by the variety and line, it ranged from $10{\sim}8.1%$ of Manchu, $5.9{\sim}20.3%$ of AGJ90-1, and $58.5{\sim}74.6%$ of Jinbu local clearly. By the treatment of transplantation time bolting rate was different, early plantation showed high bolting rate compare to the late plantation from the all of tested variety and lines. Bolting response according to the transplanting time, bolting resistant variety showed insensibility and boling line showed sensitive response. In Manchu root yield was best when planted on April 5th as 389 kg /10a, in case of AGJ90-1 was determined 377 kg/10a when planted on April 15th, and Jinbu local root yield was showed 133 kg/10a planted on April 25.

Inhibiting Floral Induction of Angelica gigas NAKAI in the Hilly Altitude Area (중.산간지대에서 참당귀의 화성억제 연구)

  • 이승필;조지형;민기군;권태용;최장수;박노권;최부술
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.40 no.1
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    • pp.1-8
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    • 1995
  • This study was carried out to investigate the effects of floral inhibition of An-gelica gigas NAKAI in the hilly altitude located in the Northern Gyeongbuk Province from Feb. 1992 to Nov. 1994. The results obtained were as follows : As the cultivated areas are high, rate of bolting was significantly decreased, having high yield, good growth, and medicinal quality. It is considered that the optimal cultivating area was at least above 600m altitude. In the hilly altitude, the more shorten nursery period was, the more decreased rate of bolting was, it results in decreased yield, having no significant differences in contents such as extracts and decursin. In bolting response from temperature treatment of the seedlings, treatment of high temperature was significantly decreased floral induction, but rate of establishment was decreased by decayed root. Bolting rate at different organic resources has more reduced in single fertilization than that of in organic application, but among organic resources, compost of rice straw has the lowest bolting rate. As a result, yield and medicinal qualities at various organic resources were increased in application of organic resources which was no con-siderable tendency among organic resources.

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Effects of Nursery Periods on Bolting Response and Yield of Solidago (미역취의 육묘일수가 추대반응과 수량에 미치는 영향)

  • 민기군
    • Korean Journal of Plant Resources
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    • v.10 no.4
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    • pp.382-385
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    • 1997
  • The experiment was carried out to investigate the optimum nursery periods on bolting responses and fresh leaf yield in Solidago virga-aurea. The result were as followings: growth characteristics as affected by nursery periods was promoted at the 60 and 70days without cultural years. Bolting responses by nursery periods of first year was respectively 14.5 and 13.5% in 40 and 50days, but the plant showing bolting reponse was not appeared at the 60 and 70 nursery periods. The highest fresh leaf yield was 60 nursery period as 2,750kg per 10a. The more bolting rate was increased, the more fresh leaf yield was decreased. As a rusult, the optimum nursery period to produce high fresh leaf yield of this crop plant was 60days.

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Effect of Root Head Diameter of Seedling on Growth and Bolting Response in Angelica gigas Nakai (묘두직경(苗頭直徑)에 따른 참당귀의 생육(生育) 및 추태반응(抽苔反應))

  • Yu, Hong-Seob;Bang, Jin-Ki;Kim, Young-Guk;Seong, Nak-Sul;Lee, Bong-Ho;Jo, Jae-Seong
    • Korean Journal of Medicinal Crop Science
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    • v.8 no.3
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    • pp.283-289
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    • 2000
  • This study was to determine optimal sizeof root top using Suwon 2 selected from the Jinbu local population though pure line selection and five root head diameters of $0.11{\sim}0.30,\;0.31{\sim}0.50,\;0.51{\sim}0.70,\;0.71{\sim}0.90\;and\;0.91{\sim}1.10cm$. Emergence rate, characteristics of top, and root were increased with increasing diameterof seedling root. In the group of root head diameter from 0.51cm to 0.70cm, bolting rate was the lowest being less than 3.3% and root yield was the highest being more than 300kg/l0a. Bolting rate was positively correlated with plant height while showed negatively correlated with root yield. The study showed that the optimum of root head diameter raised seedlings in the open field appeared to be from 0.31 to 0.70cm.

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Inhibition of Floral Induction and Variation of Yield in Angelica gigas Nagai (참당귀의 화성억제와 수량변화)

  • 조선행;김기준
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.38 no.2
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    • pp.151-158
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    • 1993
  • Since the inhibition of floral induction was considered to be an important subject to get high yield of Angelica gigas, the effects of low temperature, daylengh and shading were investigated in this study. The yield of A. gigas root grown by inhibition of floral induction was compared with the yield obtained by traditional cultivation method. When the seedings were exposed to the natural low air temperature condition until late of November, the plants which had 6 to 8 leaves showed vernalizing effect, and when the low temperature treatment was prolonged until mid of January, 4 to 5 leaf plants showed vernalizing effect. But 2 to 3 leaf plants did not show vernalizing effect regardless of the length of chilling treatment. The effectiveness of exposure to low temperature was markedly dependent upon the age of plants. In the artificial low temperature treatment the range of temperature varied with plant age. Vernalizing effect at 1,5 and 9$^{\circ}C$ of temperature did not show 3,5,6 leaf plants, respectively. The bolting percent in 8 leaf plant at 1,5 and 9$^{\circ}C$ for 8 weeks decreased by 80,45 and 5%, respectively. As daylength became longer, the bolting percent of A. gigas was increased. plants which were grown in the full sunlight showed the highest value in bolting percent, and the bolting percent was not decreased significantly with changing from full sunlight to 50% shading. When A. gigas were grown by the inhibition of floral induction, dry root weight per l0a showed the greatest value in 3 year old plant which 3.6 and 2.4 times higher than that of 1 and 2 year old plant, respectively. The yield of root was increased by 73.7% in 2 year old plant and 159.6% in 3 year old plant compared with the yield obtained by traditional cultivation method.

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Major Characteristics of Burdock(Arctium lappa L.) Native to Yeong-Narn Region (영남지역 재래종 우엉(Arctium lappa L.)의 주요특성)

  • 이중환;임재하;정종도;서동환
    • Korean Journal of Plant Resources
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    • v.16 no.1
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    • pp.8-14
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    • 2003
  • This study was aimed to obtain basic information on the characteristics of local cultivars of burdock(Arctium lappa L.) grown in Yeong-Nam region. The characteristics of seeds were shown a remarkable diversity among the local cultivars. Germination rate was the highest at 25$^{\circ}C$ and Munkyong' as the highest germination rate(42.2%) at l0$^{\circ}C$ respectively. In Youchon' and 'Chilgok', about 10% was bolted but the other was rarely or none. The range of root length was 62∼77cm and lateral root number was maximum 5.5('Koryong') and minimum 0.3('Songju). 'Chongdo I' contents 14.2mg/100g of tannin in root and 'Kyongsan', 'Koryong', 'kyongiu',’ Kumi' and 'Haman' taste not bitter in leaves.