• Title/Summary/Keyword: 식물 초장

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Effect of Sowing Date on Growth and Flowering of Celosia argentea (개맨드라미의 파종과 정식기가 생장 및 개화에 미치는 영향)

  • Lee Jeong-Ho;Jo Dong-Gwang;Song Cheon-Young
    • Korean Journal of Plant Resources
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    • v.19 no.1
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    • pp.120-125
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    • 2006
  • This experiment was conducted to investigate growth and flowering characteristics of Celosia argentea native to Korea treated by monthly sowing from January 20 to August 20 in the field. As sowing date delayed from January to June, the days to flowering were increased. Seedlings sown on February and March planted in the field on April and May were shorter, 31 days to flower, shorter plant height, much more number of flower than those of sown on May and June planted in the field on July and August which means Celosia argentea may be facultative short day plant. And the seedlings sown on February and March were precious ornamentals for bed plant from summer to fall, however, the seedlings sown on April and May were valued for bed or cut plant producing in fall.

Varietal Difference of Growth Inhibition by Ouinclorac in Tomato Seedling (토마토 유묘(幼苗)의 Quinclorac에 의한 生育 저해(沮害) 정도(程度)의 품종간(品種間) 차이(差異))

  • Lee, Y.M.;Shin, S.H.
    • Korean Journal of Weed Science
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    • v.14 no.4
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    • pp.291-297
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    • 1994
  • Seedlings of eight varieties of tomato were treated on the soil surface by each six application rate (0 to 5g ai/ha) of herbicide quinclorac. Percent of control in plant height at 7 days after treatment ranged from 69% to 81% at 5g ai/ha application of quinclorac. At 28 days after treatment those of (2-26)*836038 and (TR*VC8-1)-1-2F4 were 88% and 89%, respectively. However, those of other six varieties except former two varieties were 61% to 68%. The variations of percent of control in shoot dry weight among eight varieties were larger than those in plant height. Those of (2-26)*836038 and (TR*VC8-1)-1-2F4 were also higher than those of other six varieties at 4 - 5g ai/ha application of quinclorac.

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Screening of Korean Native Plant Extracts for Herbicidal Activities (국내 자생식물 추출물의 살초활성 탐색)

  • Park, Ye-Won;Chang, Joon-Hyeok;Kim, Kun-Woo
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2018.04a
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    • pp.82-82
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    • 2018
  • 본 연구는 국내에 자생하는 자원식물들의 살초활성을 조사하여 식물생장억제물질을 활용한 환경친화형 제초제 개발에 요구되는 기초 자료를 확보하기 위해 수행되었다. 국내 자생 식물 101종을 식물체 부위별로 나누어 MeOH로 추출하여 획득된 시료 129점에 대해 돌피(Echinocholoa crus-galli P.B. var. formosensis Ohwi)를 이용한 살초활성 검정을 실시하였다. 시료를 소량의 methanol로 녹여 직경 5.5cm petri dish 상의 Whatman No. 2 여지에 균일하게 흡착시킨 후, fume hood 내에서 용매를 제거하고 1mL의 증류수를 첨가하였다. 돌피 종자를 15립씩 3반복으로 파종하여 $28^{\circ}C$, 5,000lux의 growth chamber에 치상하고, 7일 후 시험구 당 균일하게 자란 10개의 유묘를 선발해 초장 및 근장을 조사하였으며, 살초활성 평가를 위해 대조구 개체의 초장과 근장에 대한 생장억제율을 산출하였다. $1,000{\mu}g/mL$ 농도에서 101종 129점 MeOH 추출물들의 돌피 유묘 뿌리 생장에 대한 억제율을 조사한 결과, 80% 이상을 나타낸 식물 시료는 가죽나무 줄기, 누린내풀 지상부, 단풍취 뿌리, 두릅나무 지상부, 백양꽃 전초, 백양꽃 지하부, 병조희풀 경엽부, 산사나무 잎 가지, 삽주 뿌리, 상사화 전초, 상사화 지하부, 석산 뿌리, 애기송이풀 전초 등 17점이었다. 이들 중 90% 이상 고활성을 나타낸 단풍취 뿌리, 두릅나무 지상부, 백양꽃 전초, 상사화 지하부, 석산 뿌리 유래의 추출물에는 새로운 환경친화형 제초제 개발소재로써 활용할 수 있는 살초활성물질들이 함유되어 있는 것으로 생각된다.

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본논 막바지 관리와 병충해방제

  • 이상석
    • The Bimonthly Magazine for Agrochemicals and Plant Protection
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    • v.6 no.9
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    • pp.48-56
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    • 1985
  • 금년도에도 전기 벼농사는 풍년이 될 것임을 보여주고 있다. 초장이나 경수로 보아 약간 떨어지기는 했으나 수량에는 큰 지장을 줄 것 같지 않고 오히려 등숙이 나아질 수 있는 여건이 되기 때문에 큰 기대를 해봄직도 한 상황이다. 그러나 해에 따라서는 예기치 않은 재해와 막바지의 병충해 피해로 말미암아 그 기대가 어긋나는 해도 있었다. 지난 1975년도에서도 모두 풍년임을 자긍하다가 벼멸구의 피해로 그 기대가 사라진 적이 있지 않았던가. 전기 벼농사는 벼의 잎과 줄기를 즉 초장과 경수를 만드는 기간이라면 후기 벼농사는 우리가 실제 필요로 하는 쌀을 만드는 과정이다. 앞으로 해야할 중요한 관리는 물대기 알거름주기 병충해 방제 그리고 제때 벼베기 하는 것들이다.

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Effects of Plant Growth Regulator on Seedling Growth in Onion Seed(Allium cepa L.) (식물 生長調整劑處理가 양파(Allium cepa L.)의 幼苗生長에 미치는 영향)

  • 이성춘
    • Korean Journal of Plant Resources
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    • v.14 no.1
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    • pp.38-42
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    • 2001
  • This study was conducted to stable direct sowing cultivation with seedling growth promotion by plant growth regulator treatment in onion seed(Allium cepa L.) The emergence percentage of soaked seed in BA, GA$_3$, and kinetin solution were higher than control seed, and those were 93.0, 94.3, 93.8%, respectively. The plant height was significant elongation in growth regulators treated seed, and those effects were high GA$_3$, kinetin and BA in the order, and the extend were high as increasing the growth regulator solution concentration in GA$_3$ and BA, and that was reverse in kinetin. The No. of leaf was increased in growth regulators treated seed, and the extend were similar among the growth regulators. The No. of root was increased significantly in growth regulators treated seed, and the extend were high in GA$_3$, BA and kinetin in the order.

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Effects of Plant Growth Regulators on the Growth and Flowering of Pot Pelargornium hortorum (분식(盆植) 제라니움의 생육(生育) 및 개화(開花)에 미치는 식물생장조절제(植物生長調節濟)의 효과)

  • Chung, Hee;Lee, Seung Woo
    • Horticultural Science & Technology
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    • v.16 no.2
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    • pp.244-246
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    • 1998
  • This study was carried out to investigate the effects of plant growth regulators on the growth and development of pot 'Pinto Rose' and 'Pinto Scarlet' geraniums. Plant height was increased by $GA_3$ treatments in both 'Pinto Rose' and 'Pinto Scarlet' geranium. However, the number of branches was not affected by $GA_3$ and daminozide treatments. The combined treatments of $GA_3$ and daminozide delayed the days to first flowering in 'Pinto Scarlet' geranium. Also, in 'Pinto Rose', $GA_3$ or the combination of $GA_3$ and daminozide treatments delayed the first flowering time. 'Pinto Scarlet' geranium was more sensitive to growth regulator treatments than 'Pinto Rose'. The number of flower stalks and branches were increased by uniconazole in 'Pinto Scarlet', while the flower stalk length and canopy diameter were severely decreased by uniconazole treatments in both cultivars. The days to first flowering tended to be delayed by all growth retardant treatments in geranium.

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Effect of Grafting Cultivation on the Growth of Hot Pepper (고추 접목재배가 생육에 미치는 영향)

  • Kim Eun-Hyun;Kim Hak-Jin;Kwon Byung-Sun;Lim June-Taeg;Hyun Kyu-Hwan;Kim Do-Young;Shin Dong-Young
    • Korean Journal of Plant Resources
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    • v.18 no.1
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    • pp.78-84
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    • 2005
  • Charactertistics of growth from graft induced three stock of red pepper cultivar were analysed. R-safe rootstock was more higher and vigorous than that of the Yeok kang, Konesian hot cultivar at seedling stage and had good characteristics for grafting in the space of cut surface and the amount of sap released. Numbers of branches were more numerous in the grafted plants than those of non-grafted as grafting affected their growths in the process of branching. There was no distinct difference in plant height among the different rootstock. However the R-safe rootstock showed considerably high growth in the 41st days after grafting. Grafting was effective in the early flowering and the R-safe was the earliest in flowering because of it's good growth under the low temperature.

Growth Response according to Indoor Light Levels of Two Evergreen Conifer Species Native to Korea (자생 상록 침엽수 개비자나무와 비자나무의 실내 광량에 따른 생육반응)

  • Lee, Ha Min;Lee, Cheol Hee;Oh, Chan-Jin;Cho, Ju Sung
    • Proceedings of the Plant Resources Society of Korea Conference
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    • 2019.10a
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    • pp.60-60
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    • 2019
  • 개비자나무[Cephalotaxus harringtonia (Knight ex Forbes) K. Koch]와 비자나무[Torreya nucifera (L.) Siebold & Zucc.]의 3년생 실생묘를 유리온실에 재배하면서 실험재료로 사용하였다. 실내의 광량을 측정하여 10, 50, 100 및 200 PPFD (${\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$)로 설정하였다. 광량을 제외한 광주기(12/12 h), 온도($25{\pm}1^{\circ}C$), 습도($55{\pm}3%$) 및 관수(1회/3일)주기를 일정하게 유지시킨 밀실에서 8주간 재배하였다. 유리온실에서 재배중인 식물과 광량별 처리구의 초장, 줄기직경, 엽수, 엽장, 엽폭, 엽록소함량(SPAD) 및 광화학반응을 평가하였다. 개비자나무의 생육결과, 모든 광량조건에서 줄기직경과 엽록소함량이 증가하는 경향을 보였으며, 초장, 엽폭의 경우 대조구와 유의한 차이가 없었다. 스트레스지수(Fm/Fo), 최대양자수율(Fv/Fm) 및 광계II 성능지수(Pi_Abs)는 대조구에 비해 모든 광량에서 증가하는 경향을 나타냈다. 10 PPFD의 광량을 제외한 처리구에서 재배된 비자나무의 초장, 줄기직경, 엽장, 엽폭은 대조구와 유사한 경향을 나타냈다. 한편, 엽수와 엽록소함량은 대조구에 비해 우수하였다. Fm/Fo, Fv/Fm, Pi_Abs 및 비광학적 에너지의 손실(DIo/RC)은 모든 광량처리구에서 대조구에 비해 유의적으로 높은 측정값을 나타냈다.

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Development of Models for Estimating Growth of Quinoa (Chenopodium quinoa Willd.) in a Closed-Type Plant Factory System (완전제어형 식물공장에서 퀴노아 (Chenopodium quinoa Willd.)의 생장을 예측하기 위한 모델 개발)

  • Austin, Jirapa;Cho, Young-Yeol
    • Journal of Bio-Environment Control
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    • v.27 no.4
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    • pp.326-331
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    • 2018
  • Crop growth models are useful tools for understanding and integrating knowledge about crop growth. Models for predicting plant height, net photosynthesis rate, and plant growth of quinoa (Chenopodium quinoa Willd.) as a leafy vegetable in a closed-type plant factory system were developed using empirical model equations such as linear, quadratic, non-rectangular hyperbola, and expolinear equations. Plant growth and yield were measured at 5-day intervals after transplanting. Photosynthesis and growth curve models were calculated. Linear and curve relationships were obtained between plant heights and days after transplanting (DAT), however, accuracy of the equation to estimate plant height was linear equation. A non-rectangular hyperbola model was chosen as the response function of net photosynthesis. The light compensation point, light saturation point, and respiration rate were 29, 813 and $3.4{\mu}mol{\cdot}m^{-2}{\cdot}s^{-1}$, respectively. The shoot fresh weight showed a linear relationship with the shoot dry weight. The regression coefficient of the shoot dry weight was 0.75 ($R^2=0.921^{***}$). A non-linear regression was carried out to describe the increase in shoot dry weight of quinoa as a function of time using an expolinear equation. The crop growth rate and relative growth rate were $22.9g{\cdot}m^{-2}{\cdot}d^{-1}$ and $0.28g{\cdot}g^{-1}{\cdot}d^{-1}$, respectively. These models can accurately estimate plant height, net photosynthesis rate, shoot fresh weight, and shoot dry weight of quinoa.

Studies on the Relationship between Radiosensitivity and Mutation Induction in Soybean (대두의 방사선감수성과 돌연변이 출현양상에 관한 연구)

  • Kwon, S.H.;Won, J.L.
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.26 no.4
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    • pp.318-323
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    • 1981
  • This study was conducted to establish an effective radiation treatment and selection method for induced mutants in M_1 population of soybean treated with gamma-ray. About 64% of total M_1 plants was reduced in plant height up to 50 - 60% and among which 60 - 70% of the plants were contained mutations in M_2 generation. About 60% of the MI plants have born 6 - 15 seeds per plant and 50 - 60% of their progenies produced mutants in M_2 generation. Positive correlation between plant height and number of seeds per plant in M_1 population was found. Higher visible macro-mutation rate in M_2 was observed in the groups of reduced plant height and seed number in the M_1 generation, whereas the frequency of chlorophyll mutation was increased in the group of less damaged plants. The size of mutation sector was increased with reduction in number of seeds per M_1 plant and the mutants were occurred at random in all the parts of M_1 plants. For the effective selection of mutants in soybean mutation breeding, the M_1 seeds should be harvested from the radiation damaged M_1 plants with the application of higher doses of mutagens, and handling M_2 generation by bulk population method is recommendable.

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