• Title/Summary/Keyword: Seedling quality

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Effect of covering materials on seedling quality of rice (못자리 피복재가 벼의 묘소질에 미치는 영향)

  • Song, Suk-Yeon;Kim, Tae-Heon;Sohn, Jae-Keun
    • Current Research on Agriculture and Life Sciences
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    • v.28
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    • pp.47-52
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    • 2010
  • This study was carried out to investigate the availability of covering material used for raising seedlings in the rice nursery bed. The pre-germinated seeds of a rice cultivar 'Chilbo' were sown into seedling tray ($60{\times}30{\times}2.5cm$) on 20th April and 3rd May 2010. Polypropylene spunbonded fabric (PSF) and lagging were used for covering materials in rice nursery bed. The growth characteristics of seedlings were evaluated at 8, 15 and 25 days after sowing (DAS) in the nursery beds covered with PSF and lagging, respectively. The plant height of 8-day old seedlings grown in lagging nursery bed was longer by 2cm than those in PSF nursery bed when the seeds were sown on 20th April, but seedling quality grown in lagging nursery bed was poor compared with that in PSF nursery bed. The growth characteristics of 15-day old seedlings were similar to that of 8-day old seedlings. The plant height of 8, 15 and 25-day old seedlings grown in lagging nursery was longer than those in PSF nursery when the seeds were sown on 3rd May. The seedling quality grown in PSF nursery was better than that in lagging nursery. The seedlings grown in PSF nursery have more leaves and better seedling quality compared with that of lagging nursery. The seedling quality was remarkably decreased with the increase of nursery period in lagging bed but seedlings quality were recovered at 5 days after hardening treatment by removing the lagging.

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Effects of Different Root Restriction Media on Root Activity and Seedling Quality and Early Growth Parameters of Runner Plantlets of Strawberry After Transplanting

  • Park, Gab Soon
    • Journal of Environmental Science International
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    • v.25 no.3
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    • pp.337-343
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    • 2016
  • The present study aimed to determine the influence of various root restriction media on seedling quality and early growth of strawberry after transplanting. The root activity of the seedlings, measured 20 days after fixation, was considerably higher (0.096, 0.090, and $0.063mg{\cdot}g^{-1}{\cdot}h^{-1}$ at 420, 450, and 480 nm, respectively) in expanded rice hull (ERH) treatment than in the sandy loam and loamy sand treatments. The volumetric water content (VWC) of the root media tested across 3 irrigation regimes (15 d, 30 d, 45 d) in the nursery field was highest in sandy loam (65.0-66.8%), followed by 59.4-61.3% in loamy sand and 38.6-45.3% in ERH. When growth parameters of runner plantlets were compared, ERH treatment was found to result in the highest crown thickness and fresh weights of root and above-ground parts. This had a favorable influence on above-ground tissue growth after transplanting to plastic house soil. As mentioned above, ERH treatment resulted in the highest seedling quality and early growth after transplanting. The results of this study would serve as useful on-site data for the production of high-quality strawberry seedlings.

Growth Characteristics of Veronica rotunda var. subintegra (Nakai) T.Yamaz. according to Several Cultivation Conditions (몇 가지 재배조건에 따른 산꼬리풀의 생육특성)

  • Lee, Sang In;Yeon, Soo Ho;Cho, Ju Sung;Lee, Cheol Hee
    • Korean Journal of Plant Resources
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    • v.33 no.1
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    • pp.24-32
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    • 2020
  • This study was aimed to establish the most effective approach for the cultivation of Veronica rotunda var. subintegra (Nakai) T.Yamaz. plants, which was expected as new ornamental plants. We conducted an experiment using plug seedlings, varied the seeding container type and seeding rate. We also varied seedling quality, planting container, soil type, and shading ratio. Seedling quality was used seedlings produced from different seeding containers and seeding rates. The seedling quality were seeding growth using 162, 200, and 288 trays, and seedings rate was used seedlings produced by sowing 1, 2, 4 and 6 seeds. As a result, 162 trays of seedlings were suitable for use in this study. Plants grown with one seed per cell in individual cells exhibited increased individual growth, but those grown with four seeds per cell exhibited better growth for the whole plant. According to seedling quality, seedlings produced in the 162 trays or with four seeds per cell showed higher growth than other seedlings. In the cultivation of V. rotunda var. subintegra (Nakai) T.Yamaz., seedling growth increased depending on container capacity for both shoot and root parts. Container material had no significant impact on seedling growth. Seedlings grew the best on horticultural substrate, and showed better growth on mixed soils with high decomposed granite content than on peatmoss.

Effect of Pot Depth on Root Development and Distribution during Seedling Growing Period in Tobacco. (육묘포트 깊이가 담배의 뿌리발달 및 분포에 미치는 영향)

  • 이상각;심상인;강병화;이학수;석영선
    • Journal of the Korean Society of Tobacco Science
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    • v.19 no.1
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    • pp.18-23
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    • 1997
  • The study was carried out to clarify reasonable production of healthy seedling, optimal Pot depth, and appropriate transplanting time, which can be deduced from understanding of seedling quality. Seedling quality results from growth of root and shoot, morphology and distribution of root system under influence of Pot depth during seedling growing period. Stem height, shoot dry weight, leaf area and leaf number were increased in proportion to depth of pots. Growth of shoot and root during seedling growing period showed the most dramatic development between 20th and 25th day after temporary planting. Root number increased as pot depth decrease and total root length and dry weight increased as pot depth increase. In 5cm pot, relative multiplication rate was higher and mean extension rate was lower than other depth of Pot. The limitation of pot volume in which rhizosphere was located enhance the development of roots of second and third order. At 20th days after temporary Planting root distribution was relatively uniform in length and development of adventitious root on stem base was poor as Pot depth decreased.

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Effects of Seed Storage Temperature and Pre-Treatment on Germination, Seedling Quality on Wild Trichosanthes kirilowii Maxim and Trichosanthes kirilowii var. japonica Kitam (종자저장온도 및 전처리가 야생 하늘타리와 노랑하늘타리의 종자발아 및 유묘 생육특성에 미치는 영향)

  • Lee, Su Gwang;Kim, Hyo Yun;Ku, Ja Jung
    • Korean Journal of Medicinal Crop Science
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    • v.22 no.1
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    • pp.53-59
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    • 2014
  • This study was conducted to determine the effects of seed storage temperature and pre-treatment on seed germination, seedling quality and vigor index of wild Trichosanthes kirilowii and Trichosanthes kirilowii var. japonica. As a result the highest germination rate of T. kirilowii was the 95% at seed stored in room temperature and then soaking for 24 hours in $dH_2O$. And the highest germination rate of T. kirilowii var. japonica was 96% at seed stored in $2^{\circ}C$ and then soaking for 24 hours in $GA_3$ (100 ppm). But the seed germination rate was non-significance in pre-treatment at seed stored in room temperature $2^{\circ}C$. Seedlings of T. kirilowii and T. kirilowii var. japonica showed not only the best seedling quality but also seedling vigor index in seed stored at $2^{\circ}C$ and then soaking for 24 hours in $GA_3$ (100 ppm). In this research, T. kirilowii and T. kirilowii var. japonica seed were stored in room temperature or $2^{\circ}C$, and then sown in peat moss, seed germination rate was more than 90% and production of superior quality seedlings.

Effects of Biomaterials Mixed with Artificial Soil on Seedling Quality of Fraxinus Rhynchophylla in a Containerized Production System

  • Dao, Huong Thi Thuy;Youn, Woo Bin;Han, Si Ho;Seo, Jeong Min;Aung, Aung;An, Ji Young;Park, Byung Bae
    • Journal of Forest and Environmental Science
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    • v.35 no.1
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    • pp.25-30
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    • 2019
  • The composition of artificial soil in a containerized seedling production plays an important role in seedling quality as well as environmental issues. We investigated the effects of different types of biomaterials and mixed ratio with artificial soil on the growth of Fraxinus rhynchophylla seedlings. Soil medium was supplemented with 3 levels (0%, 10%, 20%) of pine bark, mushroom sawdust and rice husk. Root collar diameter (RCD), height growth, and biomass have significantly increased when rice husk was applied. Compared with the control, RCD and height growth showed highest in 20% rice husk treatment with an increase of 5.7% and 17.6%, respectively. In contrast, the treatments of pine bark and mushroom sawdust showed lower results in growth parameters (RCD, height growth, and total biomass) than control. Seedling quality index was also highest at the 20% rice husk treatment, but there was not statistically different among treatments. Our results suggested rice husk can be substituted up to 20% of substrates for containerized F. rhynchophylla seedling production system.

The Effects of Fertilization on Growth Performances and Physiological Characteristics of Liriodendron tulipifera in a Container Nursery System (시비 처리가 백합나무 용기묘의 생장 및 생리적 특성에 미치는 영향)

  • Cho, Min Seok;Lee, Soo Won;Park, Byung Bae;Park, Gwan Su
    • Journal of Korean Society of Forest Science
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    • v.100 no.2
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    • pp.305-313
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    • 2011
  • Fertilization is essential to seedling production in nursery culture, but excessive fertilization can contaminate surface and ground water around the nursery. The objective of this study was to find optimal fertilization practice of container seedling production for reducing soil and water contamination around the nursery without compromising seedling quality. This study was conducted to investigate growth performance, photosynthesis, chlorophyll fluorescence, and chlorophyll contents of Liriodendron tulipifera growing under three different fertilization treatments (Constant rate, Three-stage rate, and Exponential rate fertilization). Root collar diameter, height, and biomass of L. tulipifera were the highest at Constant treatment. Like growth performance, seedling quality index (SQI) were higher at Constant than at other treatments, but not significantly different among treatments. L. tulipifera showed good photosynthetic capacity at all treatments. Photochemical efficiency and chlorophyll contents were significantly lower at Exponential than at other treatments. Therefore, Exponential fertilization which is 50% fertilizer of other treatments would maximize seedling growth and minimize nutrient loss.

Transplant Quality and the Yield of 'Momotaro-Yoku' Tomato as Affected by Seedling Age and Container Size Used for Raising Seedling in Summer (모모타로-요쿠 토마토 하계 육묘시 용기 크기와 묘령이 정식 후 생육 및 수량에 미치는 영향)

  • 최영하;조정래;이한철;박동금;권준국;이재한
    • Journal of Bio-Environment Control
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    • v.11 no.1
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    • pp.12-17
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    • 2002
  • Tn establish the criteria for appropriate seedling production method in the summer, the effect of container size and seedling age on the growth and yield were evaluated with tomato. The seedling quality was higher when seedlings were grown polyethylene in 9cm pots than in 72 cell plugs. Seedling quality increased with increase in seedling age in polyethylene pots, whereas seedling age did not affect seedling quality in plug trays. Fruits matured earlier on plants started from pot-grown transplants for a long duration than with plug tray-grown transplants for a shorter duration. Not only total yield in 4 months, but the early yield in the first 2 months, was higher with pot-nursed transplants than with plug tray-nursed transplants. With pot-grown transplants, The early yield in initial 2 months was the lowest in 25 day-old transplants, whereas there was no significant differences between 35- and 45-day-old transplants. Seedling age did not affect the cumulative yield for 3 months after the first harvest. With plug tray-grown transplants, the cumulative yield tar initial 3 months was the highest in plants grown for 35 days in the nursery, followed by 25 day and 45 day. However, there were no significant differences among seedling ages in the total yield.

Effect of Grafting Methods on Plug Seedling Quality, Growth after Transplanting and Yield of Oriental Melon (Cucumis melo L. var. makuwa Mak.) (참외 접목방법이 플러그 묘 소질과 정식 후 생육 및 수량에 미치는 영향)

  • Bae Su Gon;Kim Jwoo Hwan;Do Han Woo;Shin Yong Seub;Seo Yong Jin
    • Journal of Bio-Environment Control
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    • v.14 no.1
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    • pp.56-62
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    • 2005
  • This study was conducted to investigate the effect of grafting methods on plug seedling quality, growth after transplanting, and yield of oriental melon that those seedlings were raised in the 32 hole plug tray for protected cultivation. Number of leaf and leaf area in approach grafting were higher until 15 days after grafting but lower on 20 days after grafting. Plant height, stem diameter and content of chlorophyll were nearly the same of each grafting methods on 20 days after grafting. Growth of top part, that is, plant height, leaf number, and leaf area on root removed single cotyledon ordinary splice grafting was the highest among the grafting methods. In the underground part, dry weight of root was high and T/R ratio was the lowest. Seedling quality of root removed single cotyledon ordinary splice grafting was the highest among grafting methods before transplanting. Plant height, number of leaf, leaf area and dry weight of root removed single cotyledon ordinary splice grafting in the growth of field were the highest on 30 days after grafting among grafting methods and days required for first flowering was also shorter, 38.4 days among grafting methods. But Fruit weight, content of soluble solids, fruit hardness, and color characteristics in fruit quality were insignificant among each grafting methods. Consequently, grafting methods influenced on the seedling quality, of oriental melon early growth after transplanting and yields. It was concluded that root removed single cotyledon ordinary splice grafting was the best methods in present study. It will be needed to convert grafting methods. Thus new grafting method should be applied.

Seedling Quality and Photosynthetic Characteristic of Vegetables Grown Under a Spectrum Conversion Film (광전환 필름 피복에 따른 채소류의 묘소질 및 광합성 특성)

  • Yoon, Hyo In;Kang, Jun Hyeun;Kim, Doyeon;Son, Jung Eek
    • Journal of Bio-Environment Control
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    • v.30 no.2
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    • pp.110-117
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    • 2021
  • This study aims to investigate the effect of spectrum conversion film on seedling quality and photosynthetic traits of leaf and fruit vegetables. Lettuce, Chinese cabbage, and cucumber seeds were sown in 50-cell plug trays filled with commercial seedling media and grown under a spectrum conversion film (SCF) and a poly-ethylene film as a control. The SCF decreased blue-green light and increased red light, and thereby increased the R/FR ratio and R/B ratio of solar spectrum, which was sufficient to affect the photosynthesis, growth, and morphogenesis of the seedlings. The photosynthetic rates of Chinese cabbage and cucumber were significantly increased under the SCF, and their maximum photosynthetic rates were 23% and 19%, respectively. However, the growth of lettuce was decreased under the SCF, and the plant height and leaf length became longer, resulting in a decrease in seedling quality. Although the morphology of Chinese cabbage grown under the SCF was not changed compared to the control, the leaf dry weight increased and its dwarf rate was 10%. The growth of cucumber under the SCF was similar to that of the control, but the plant height and petiole were significantly reduced, resulting in a high dwarf rate of 24%. It was concluded that the solar spectrum modified by the SCF increased the photosynthetic efficiency and improved the seedling quality of Chinese cabbage and cucumber.