• Title/Summary/Keyword: Leaf growth

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Growth and Photosynthetic Characteristics of Atractylodes japonica by Light Controls and Leaf Mold Treatment in Forest Farming (임간재배 시 광조절과 부엽토 처리에 따른 삽주의 생육 및 광합성 특성)

  • Jeon, Kwon Seok;Song, Ki Seon;Choi, Kyu Seong;Kim, Chang Hwan;Park, Yong Bae;Kim, Jong Jin
    • Korean Journal of Medicinal Crop Science
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    • v.23 no.2
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    • pp.161-167
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    • 2015
  • This study was carried out to determine the effects of light controls and leaf mold on root growth and physiological responses of Atractylodes japonica growing in forest farming. The experiment was performed by light controls (100%, 62.5%, 40.3% and 19.7% of full sunlight) and application of leaf mold to soil. Height, stem diameter, number of flower buds and root collar diameter were the highest in leaf mold within 62.5% of full sunlight (relative light intensity 62.5%). And these were the higher in leaf mold within each light level. As the shading level increased, light saturation point and maximum photosynthesis rate decreased. As the light level decreased, SPAD value increased in control and leaf mold. As a result of surveying the whole experiment, A. japonica was judged worse root growth under the lower light level. It was concluded that the light level was one of the most important factors to produce A. japonica. Also, producing high-quality of A. japonica with the price competitiveness by using leaf mold like the experiment can be an effective way to increase incomes for farmers.

Correlation between the Illuminance and the Flowering and Leaf Growth of Trees at Night - In Case of Downtown from Jamsil Station to Olympic Park, Seoul - (도심 내 야간의 조도와 봄철 수목 개화 및 잎 생장 간 상관관계 - 서울 잠실역에서 올림픽공원 구간을 대상으로 -)

  • Han, Bong-Ho;Kim, Jong-Yup;Kwak, Jeong-In;Choi, Tae-Young
    • Korean Journal of Environment and Ecology
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    • v.29 no.3
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    • pp.441-453
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    • 2015
  • In this paper, according to the illuminance at night with artificial lighting in downtown Seoul, trees flowering and leaf growth rate was performed as a case study to examine whether there is a difference. The illuminance was measured at 78 points on a total of 26 points, the range of illuminance were divided into three groups considering land use, Group A (plots 1-7) were 4.90 ~ 112.50 lx, Group B (plots 8 to 18) were 0.45 ~ 42.40 lx, group C (plots 19 to 26) were 0.28 ~ 22.10 lx. According to the One-way ANOVA on illuminance difference, the survey groups were classified into three groups. To survey the ratio of the flowering Prunus yedoensis and Rhododendron spp. and to survey the ratio of leaf growth Zelkova serrata, Ginkgo biloba, and Acer palmatum each 30 individuals were investigated. Rhododendron spp. to study the ratio of the flowering and Acer palmatum to study the ratio of leaf growth were determined to be useful as indicator woody species according to the correlation. The higher illuminance of night lighting is, the faster flowering and leaf growth of trees will be by correlation between the mean illuminance of each group and the flowering and leaf growth of trees. In the future, should be made a more detailed study of how much affect to the trees with some impact on the level of light pollution at night lighting.

Effects of Light Environment on Dry Matter Production and Growth of Zoysia japonica (광환경이 한국들잔디(Zoysia japonica)의 물질생산과 생장에 미치는 영향)

  • 도봉현
    • Asian Journal of Turfgrass Science
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    • v.13 no.1
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    • pp.1-20
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    • 1999
  • This study was carried out to investigate the interaction between productivity and light condition and to analyze the material productivity and productive charactaristics under different hours of light in Zoysia japonica. 1. Rate increasement of leaf number and total leaf length was remarkably high at the early growth stage in the control and 9 hour light treatment. The rate gradually decreased as growth proceeded. But 3 hour treatment was very low in the rate from its early growth stage through the whole test period. 2. The increasing rate of leaf area ratio (LAR) in all the experimental plots was remarkably high at the early growth stage after transplanting the grass. The shorter photoperiod resulted remarkable lower increasement of LAR. 3. The rhizome growth rate of the 9 hour photoperiod was high contrast to the 3 hour photoperiod treatment. The increasing rate of node number was also showed similar trend. 4. Chlorophyll content was very high at the 36 days after transplanting and then decreased gradually. Chlorophyll content on 3 hours photoperiod plot severely decreased. The ratio of chlorophyll a to b was decreased significantly at short day treatment. 5. The content of soluble sugar was increased at shorter photoperiod. The highest ratio of sugar content was on August, 28 by HPLC method. Such a result was attributed to accumulation of sugar in spite of low synthesis of ploysacchrides, translocation by low consumption. 6. The increasing rate of standings in all light treatment was high at the early growth stage after transplanting. Short photoperiod treatment by 3hour showed especially low prganic productivity on Zoysia japonica.

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Effects of Substrates Supplemented with Crushed Shell, Elvanite and bioceramic on the Growth of Rice(Oryza sativa L.) (패화석, 맥반석 및 바이오세라믹의 혼입처리 벼의 생육에 미치는 영향)

  • 박순기;김홍기;정순주
    • Korean Journal of Organic Agriculture
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    • v.6 no.1
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    • pp.127-132
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    • 1997
  • This experiment was carried out to examine the effect of various functional materials such as bioceramic podwers, crushed shells and elvanites supplemented to the each substrate on the seedlings growth of rices. The rice seedlings were grown in pots filled with substrates supplemented with bioceramic podwers, crushed shells and elvanites. The growth of rice seedlings in terms of plant height, stem diameter, root length and leaf width, plant fresh and dry weight was promoted by adding the bioceramic powders (2 to 3g/kg), crushed shells (10g/kg) or elvanites (20 to 40g/kg). Plant height was also promoted by the adding of bioceramic powder from 16 days after treatment, whereas crushed shells and elvanites from 10 days after treatment. Especially, root growth was greatly influenced by bioceramic powder, whereas the shoot growth(leaves and stem) was stimulated by the crushed shells and elvanites supplemented into each substrate. In the field, plant growth in terms of plant height, leaf length and leaf width were also influenced by crushed shells and elvanites at 74 days after treatment. The growth of rices in terms of tiller number, spikelets, panicles and spikelets/panicle was incresed by adding the crushed shells and elvanites from 100 to 200g per m2.

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Effect of Growth Retardants on the Growth of Periila fuetescens var. acuta (차즈기(Perilla frutescens var. acuta)의 생육에 미치는 생장억제제의 영향)

  • Lee, Jong-Suk;Park, Young-Min
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.7 no.2
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    • pp.1-11
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    • 2004
  • The purpose of this study was to determine usability as potted flowers and garden plants by controlled plant height using growth retardants. There was no significant difference on the dwarfing effect according to the degree of exposure the sun, but growth was well under full exposure to the sun. The plant height was decreased by application of Cycocel (CCC), Bonzi (paclobutrzol), Ancymidol, and Uniconazole compared to the control group, and treatment of Bonzi $5mg{\cdot}L^{-1}$ was most dwarfing effect for both full sun exposure or 70% controlled shading condition. No consistent different was found in stem diameter, leaf color change, the content of chlorophyll and anthocyanin when the concentration of plant growth retardants was altered. These factors were affected only by light intensity. In comparison to the results of the control group, leaf length, leaf width, plant width and petiole length were all reduced by the application of growth retardants.

Effect of CO2 Supply on Lettuce Growth

  • Hyeon-Do Kim;Yeon-Ju Choi;Eun-Young Bae;Jum-Soon Kang
    • Journal of Environmental Science International
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    • v.33 no.6
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    • pp.355-365
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    • 2024
  • This study was conducted to investigate the effects of CO2 supplement on growth and quality in greenhouse lettuce cultivation. When CO2 was supplied at 1,500 ppm in lettuce cultivation, overall growth parameters such as number of leaves, leaf area, plant length, fresh weight, and dry weight were superior compared to those of the control group. While there was no significant difference in relative growth rate due to CO2 supplement, an increase in leaf area index was observed with CO2 usage. Furthermore, although there was no significant difference in the content of water-soluble vitamins such as Vitamin C, B1, B2, B5, and B6 due to CO2 supplement, the Vitamin B3 content in the CO2 treatment group was 0.5 mg/kg higher than in the control group. Therefore, the use of CO2 in lettuce cultivation resulted in increased yield and promoted growth, enabling early harvesting.

Characteristics of Initial Growth of Tilia Amurensis Rupr. Seedlings by an Environmental Stress Ultraviolet-B Irradiation (환경적(環境的) 스트레스 자외선(紫外線)-B 조사(照射)에 의한 피나무 유묘(幼苗)의 초기생장(初期生長) 특성(特性))

  • Kim, Jong-Jin;Hong, Sung-Gak
    • Korean Journal of Environmental Agriculture
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    • v.15 no.4
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    • pp.448-454
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    • 1996
  • This studies was carried out to know the effects of $ultraviolet-B(280{\sim}320nm)$ irradiation on the initial growth of Tilia amurensis Rupr. seedlings. UV-B irradiation inhibited the hypocotyl elongation, height growth, leaf growth, and chlorophyll formation. The inhibition was dose-dependent, and consequently those growths were more inhibited depending on the increase of UV-B levels. Morphological change such as leaf length/leaf width ratio was also observed in the leaves of irradiated seedlings. UV-B irradiation produced scorching, glazing or chlorosis, and stunting or dwarfing in the first or second leaf of the seedlings.

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Effect of Light Intensity on the Growth of Perilla frutescens var. acuta (차즈기(Perilla frutescens var. acuta)의 생육에 미치는 광도의 영향)

  • Lee, Jong-Suk;Park, Young-Min;Hong, Jeong
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.7 no.3
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    • pp.73-77
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    • 2004
  • The purpose of this study was to improve the ornamental value of Perilla frutescens var. acuta. The growth of Perilla frutescens var. acuta was significantly varied as according to light intensities. The plant height, crown width, petiole length, leaf length, leaf width, stem diameter, and chlorophyll content were the greatest with 30% shade treatment. All of growth characteristics decreased as increasing shading levels. The anthocyanin contents also decreased with 70% shading level. The leaf color turned from dark purplish red to deep yellowish green, and the growth rate and ornamental value were the lowest with 70% shading condition.

Characteristics of Seed and Plant Growth in Local Collections of Agastache rugosa

  • Ok, Hyun-Chung;Chae, Young-Am
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.43 no.4
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    • pp.269-272
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    • 1998
  • Characteristics of seed and plant growth of the nine local collections of the medicinal plant, Agastache rugosa were evaluated. Seed size of the collection from Garyungsan was larger than the others. Seeds of Damyang collection were the smallest in size. Seeds of the collections were mostly oval shaped. There were no differences between brown and black seed coat color groups in seed width, ratio of seed length to seed width and 1,000 seed weight. Stem lengths of Garyungsan and Bongpyung collections were 99.9 and 95.6 cm, respectively, and were longer than Damyang and Jindo collections. Garyungsan collection had long leaf shape. Leaf size was the smallest for Damyang collection, but was the largest for Bongpyung collection. Inflorescence length of Mokpo collection (15.6 cm) was longer than the average over all collections (12.3 cm). Damyang collection was the shortest (10.1 cm) in inflorescence. Top dry weight of each collection from Soonchun, Bongpyung, Mokpo, Jindo, and Gurye was greater than the average over all collections (20.38 g/plant). Jinju and Damyang collections had less top dry matter than others. There was no difference in the growth traits examined between brown and black seed coat groups. The brown seed group was greater in leaf weight than the black seed group. However, these two groups were not different in stem and inflorescence weight. Collections of A. rugosa from Bongpyung, Soonchun, and Mokpo were promising for commercial cultivation because of their great top dry weight, especially in leaf and inflorescence.

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Effects of Photoperiod and Temperature on Flowering Responses of Ornamental Nicotiana species (일장 및 온도처리가 관상용 Nicotiana species의 개화에 미치는 영향)

  • Koo, Han-Seo;Kim, Chung-Whan;Lee, Young-Deuk
    • Journal of the Korean Society of Tobacco Science
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    • v.11 no.2
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    • pp.127-134
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    • 1989
  • Several growth characteristics of two ornamental tobacco species, Nicotiana sanderae and N. affinis, were investigated in this study. Also effect of temperature and daylength on the flowering of the tobacco plants were evaluated to obtain basic information on breeding and cultivation. 1. The plants were great in high temperature-long day at the early stage and in low temperature-short day at the late stage of plant growth, for both Nicotana species. At the early growth stage the leaf length N. sanderae was great in high temperature-long day, and that of N. affinis was great in high temperature-short day period, while at the late stage of the plant growth the leaf lengths were more significantly effected by the temperature rather than daylength. Leaf width and leaf shape index were less sensitive to the conditions. 2. For both of the species, the total number of tobacco leaves not much influenced by the temperature and daylength. 3. There were no significant differences for budding and flowering period between the two species, both of which were sensitive to temperature and daylength with more influence by daylength than temperature. 4. Number of floral stalks, number of flower and flowering period were not much influenced by temperature and daylength; however, N. affinis had 2 more floral stalks, 31 more flowers, and 6 day longer flowering period than N. sanderae.

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