• Title/Summary/Keyword: Seeding growth

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Germination and Early Growth Characteristics of Pennisetum alopecuroides, Phragmites communis, and Miscanthus sinensis According to the Seeding Methods (파종방법에 따른 수크령, 갈대, 억새의 발아 및 초기생장 특성)

  • Cho, Yong-Hyeon;Lee, Ka-Hyung
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.17 no.1
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    • pp.163-172
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    • 2014
  • To investigate the possibility of developing the seeding measure for river bank slope revegetation, germination experiment and early growth observation were conducted using 3 native species growing naturally around river banks such as Pennisetum alopecuroides, Phragmites communis, and Miscanthus sinensis. The applied seeding methods were 3 such as scattering seeds, tillage after scattering seeds, and covering up seed with soil after scattering seeds. According to seeding methods, germination experiment and early growth observation were carried out on nursery bed soil in greenhouse. As results of this study, all the 3 native plant species' germination ratio and growth in length on nursery bed soil were highest on the seeding method of covering up seed with soil. Also it was verified by Duncan's multiple range test that the germination ratio and growth in length on the seeding method of covering up seed with soil is distinguished from those on other two seeding methods. According to this results, the best possible seeding measure to be developed should be mechanical seed spraying with soil.

Seedling Stand Influenced by Water Management after Seeding and Seed Soaking with Plant Growth Regulators in Direct Wet Seeding Rice

  • Back, Nam-Hyun;Kim, Sang-Su;Kang, Si-Yong;Choi, Min-Gyu;Shin, Hyun-Tak;Kwon, Tae-Oh
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.44 no.3
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    • pp.225-229
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    • 1999
  • Unstable seedling stand establishment of wet direct seeding culture of rice is one of the major elements preventing the extension of its culture area. In order to develop methods of seedling stand improvement in direct seeded rice on flooded surfaces, three field experiments were conducted on silty loam soil using a cultivar 'Donjinbyeo' for three years, mainly focusing on water management after seeding and seed soaking with plant growth regulators (PGRs). Under the condition of shallow flooding after seeding, seedling stand rate increased and floating seedling rate decreased in both early and normal season seeding compared to deep flooding. With earlier draining time after seeding, there was a tendency towards preferential growth of the seminal root, increase of seedling stand and decrease of the floating seedling rate. Therefore the highest seedling numbers per unit area and the lowest floating seedling numbers were found upon drainage at 1 day after seeding (DAS), while a contrary tendency was shown upon conventional drainage at 7 DAS. Seed soaking with PGRs such as Metalaxyl or mixing of Metalaxyl with gibberellic acid (GA$_3$) significantly increased the seedling stand. In addition the effects of PGR treatment on seedling stand and the early growth of plants were greater under flooded conditions than under drained conditions after seeding, although draining of water after seeding improved the seedling establishment rate more when compared with the PGR treatment. These results suggest that draining management after seeding or maintaining of shallow flooding for a week is the most effective method to improve the seedling stand rate in wet direct seeding.

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Effects of No-tillage Dry-seeding on Rice Growth and Soil Hardness

  • Choi, Jong-Seo;Kim, Sook-Jin;Park, Jeong Hwa;Kang, Shingu;Park, Ki-Do;Yang, Woonho
    • Korean Journal of Soil Science and Fertilizer
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    • v.49 no.6
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    • pp.662-668
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    • 2016
  • No-tillage dry-seeding of rice can offer potential benefits by reducing time and labor cost compared with conventional tillage practices. This study was conducted to investigate the effects of no-tillage dry-seeding on rice growth and soil hardness in comparison with other rice cultivation methods, machine transplanting and wet-hill-seeding on puddled paddy. The seedling stand fell within optimum range for both no-till dry-seeding and wet-hill-seeding on puddled paddy. Plant height, number of tillers and SPAD values in no-tillage dry-seeding cultivation were higher than those observed in other methods. There were no significant differences in grain yield of rice among three cultivation methods. The quality characteristics of milled rice grown in no-tillage dry-seeding were similar to those grown in other cultivation methods. Soil hardness in top 10 cm depth was significantly higher in no-tillage dry-seeding than other cultivation methods, while soil hardness below 10 cm depth was highest in machine transplanting cultivation. Results indicate that no-tillage dry-seeding practice is comparable to conventional tillage system in terms of seedling establishment, growth, yield and grain quality.

Interior seeding combined with top seeding for the fabrication of single grain REBCO bulk superconductors

  • Lee, Hee-Gyoun
    • Progress in Superconductivity and Cryogenics
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    • v.19 no.2
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    • pp.14-18
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    • 2017
  • This study presents three dimensional (3-D) seeding technique which is a modification of interior seeding. 3-D seeding is beneficial for shortening the processing period and enhancing the magnetic properties of REBCO bulk superconductors fabricated by melt growth. Oxygen channels were provided by using divided powder compacts instead of by using a rubber insert. Microstructure observations revealed that the grains grown from the seeds impinged each other and formed low angle grain boundaries of (001)/(001). It has been shown that the 3-D seeding technique reduces the volume fraction of a-c growth sector and thereby maximizes the area of a-b growth sector which attribute to the high magnetic characteristics of single grain REBCO bulk superconductors.

Comparison of Growth Increment and Ginsenoside Content in Different Parts of Ginseng Cultivated by Direct Seeding and Transplanting (직파와 이식재배에 따른 인삼의 부위별 생육특성 및 진세노사이드 함량 비교)

  • Li, Xiangguo;Kang, Sun-Joo;Han, Jin-Soo;Kim, Jung-Sun;Choi, Jae-Eul
    • Korean Journal of Medicinal Crop Science
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    • v.18 no.2
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    • pp.70-73
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    • 2010
  • This study was carried out to clarify the difference of growth characteristics and ginsenoside content in 5-year-old ginseng root grown by direct seeding and transplanting cultivation. Root weight per plant of direct seeding cultivation was lower than that of transplanting cultivation. Fresh and dry matter partitioning ratio of direct seeding cultivation was high in main root and low in lateral because direct seeding cultivation root elongated the length of main root, while it suppressed the growth of lateral root. Total amount of ginsenoside contents by direct seeding and transplanting cultivation were 362.8 and 320.3 mg in main root, 188.6 and 548.8 mg in lateral root, 170.7 and 273.8 mg in fine root. Its contents of whole root per plant were 722.1 and 1142.9 mg by direct seeding and transplanting, respectively.

Development of a Direct Seeder with Soil Application for a Stable Direct Seeding in Rice Cultivation (벼농사 복토직파기 개발 연구)

  • Park, K.H.;Lee, J.C.;Yun, S.C.
    • Journal of Practical Agriculture & Fisheries Research
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    • v.3 no.1
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    • pp.30-47
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    • 2001
  • This research was performed to develope a stable direct seeding method in rice cultivation using by a direct seeder with soil application. A principle of this methodology was introduced from seeding nursery system of machine transplanting enable to increase high seeding establishment direct seeding method with soil application was high of 89-95% while that of water seeding was 68%. During seeding growth plant height was ralatively small but seeding health was high. A total soil consumption of this methodology was 145kg/10a in dirll seeding and 26kg/10a in hill seeding respectively, there was 100% erected in direct seeding with soil application while water seeding was 45% in erected seeding stand. In direct seeding method with soil application total carbohydrate content was higher than that of water seeding. This machine was manufactured to attach and/or detach to a machine transplanter with riding type and machine cultivator with multipurpose. In the farmer's demonstrated rice field this method was well performed like machine transplanting in terms of rice growth and development. There was highly cost reduction for rice production like other direct seeding methods.

A Study on the Mixed-Seeding Rates of Exotic Grasses for Slope Revegetation Measures (사면(斜面) 녹화용(綠化用) 외래초종(外來草種)의 혼파조합(混播組合)에 관(關)한 연구(硏究))

  • Jeon, Gi-Seong;Woo, Bo-Myeong
    • Journal of the Korean Society of Environmental Restoration Technology
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    • v.1 no.1
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    • pp.102-109
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    • 1998
  • This study was conducted to find out the growth characteristic of mixed-seeding in the grasses for slope revegetation measures. Seeding treatment with six combination types of five grasses used for this experiment such as orchardgrass(Dactylis glomerata 'Potomac'), perennial ryegrass(Lolium perenne 'Manhattan'), tall fescue(Festuca arundinacea 'Jaguar'), kentucky bluegrass(Poa pratensis 'Majestic') and weeping lovegrass(Eragrostis curvula). The growth of orchardgrass, perennial ryegrass and tall fescue were good on mixed-seeding condition in case of number of individuals, heights and coverages at this experiment. These plants will useful for revegetation measures mixed-seeding, but weeping love grass and kentucky bluegrass did not show a desirable growth in mixed-seeding condition, and these plant prefered mixed seeding to single seeding. Regeneration percents of orchardgrass, perennial ryegrass and tall fescue were higher than that of weeping love grass and kentucky bluegrass, and coverage kept on good condition through one year after seeding, therefore, these plants will effective for initial stage revegetation measures.

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Seedling Emergence and Initial Growth between Water and Dry Seeding in Forage Millet (사료용 피의 건답과 무논 파종 시 입모 및 초기생육특성)

  • Ahn, Seok-Hyeon;Chung, Nam-Jin
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.59 no.1
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    • pp.83-88
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    • 2014
  • This research was carried out to determine the characteristics of germination in relation to temperature, and seedling emergence and growth affected by soil moisture in forage millet. The seeds of forage millet could germinate at more than $15^{\circ}C$ at the rate of 0, 90.5, 97.3 and 96.8% respectively 10 days after seeding at 10, 15, 20 and $25^{\circ}C$. The result showed that the temperature needs to be $15^{\circ}C$ or more for the seeds to germinate. The effects of seeding depth on the growth characteristics and emergence of millet seed were investigated in waters and direct seeding methods by thoroughly mixing the seed and soil. In water treatment, the emergence rates were 3.7% at $15^{\circ}C$, 7.6% at $20^{\circ}C$, 6.3% at $25^{\circ}C$, while direct seeding treatment showed the emergence rates of 65.6, 75 and 71% at 15, 20 and $25^{\circ}C$, respectively. At 15, 20, and $25^{\circ}C$, seeds in water seeding could germinate at 0.5, 1.8, 1.5 cm of soil depth, while in direct seeding, they could germinate at the depth of 9.5, 10.0, 9.9 cm. When the initial growth characteristics of the seeds were investigated, there was positive correlation between seeding depth and mesocotyl length in both water and direct seed methods. Growth and development in terms of leaf age, root length, coleoptiles and mesocotyl length, and plant height were found maximum at 0.5 cm soil depth for water seeding, and 3-5 cm soil depth for direct seeding. Results showed that there were close relationship among temperature, soil depth and moisture acquiring methods, and the combination of these factors greatly affected the initial growth characteristics and development of millet seeds. It can be concluded that, to get good seedling stand and germination of millet seed, millet should grown in field condition at the depth of 0.5 cm or less for water seeding, and 3-5 cm for direct seeding method.

Growth Characteristics as Influenced by Cutting Site and Planting Method in Autumn Field Cutting of Sedum sarmentosum (돌나물의 가을 노지삽목에서 삽수부위 및 삽식방법에 따른 생육특성)

  • Ahn, Jeong-Ho;Kwon, Ji-Woong;Bae, Jong-Hyang;Lee, Seung-Yeob
    • Journal of Bio-Environment Control
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    • v.17 no.1
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    • pp.60-65
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    • 2008
  • For autumn field cutting of Sedum sarmentosum, the effects of cutting site (distal, middle, and proximal) and planting method (space drill seeding, drill seeding, and broadcast seeding) on survival rate and growth characteristics were investigated at pre- and post-winter season. Plant height root length, stem number per plant, number of branch per plant, fresh weight of shoot, and dry weight of shoot were significantly superior in distal site at pre-wintering (40 days after cutting). At post-wintering (May 10th), stem number per plant, fresh weight and dry weight per $m^2$ in cutting of distal site showed a significant increasement compared to the cutting of proximal site. At pre-wintering (40 days after cutting), the growth in space drill seeding was well than that in drill seeding and broadcast seeding, and fresh weight and dry weight per $m^2$ in space drill seeding were high in order of space drill seeding, broadcast seeding, and drill seeding. At post-wintering (May 10th), stem number per plant, fresh weight and dry weight per $m^2$ in space drill seeding were significantly increased than those in drill seeding. Accordingly, the cutting using distal site of stem in autumn field cutting was desirable for the growth and shoot yield. The space drill seeding showed the highest yield potential among three seeding methods, but broadcast seeding was favorable in saving of labor, because the fresh weight of shoot in broadcast seeding was similar in the space drill seeding at post-wintering.

Comparative analysis of growth, yields and grain quality of rice among no-tillage dry-seeding, wet-hill-seeding and transplanting

  • Choi, Jong-Seo;Kim, Sook-Jin;Kang, Shingu;Park, Jeong Hwa;Yoon, Young-Hwan;Yang, Woonho
    • Proceedings of the Korean Society of Crop Science Conference
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    • 2017.06a
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    • pp.208-208
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    • 2017
  • No-tillage practices are expected to provide several benefits such as increasing soil organic matter, reducing labor time and saving energy cost compared with conventional tillage practices. This study was conducted to investigate the effects of no-tillage dry-seeding on rice growth and soil properties in comparison with other rice cultivation methods, machine transplanting and wet-hill-seeding on puddled paddy. Rice seedling establishment was slightly higher in no-tillage dry-seeding treatment ($145seedling\;m^{-2}$) than wet-hill-seeding on puddled paddy treatment ($111seedling\;m^{-2}$), but the seedling establishment in both treatments fell within the optimum range for direct seeding rice cultivation. Plant height, number of tillers and chlorophyll content (SPAD value) of rice in no-tillage dry-seeding treatment were higher than those of the other treatments. However, no significant differences in grain yield was observed among three cultivation methods, and the yield ranged 5.8 to $5.9ton\;ha^{-1}$. The heading date from seeding under no-tillage dry-seeding treatment was on average 109 days, which was similar to that under machine transplanting treatment (112 days), but 10 days later than that under wet-hill-seeding on puddled paddy treatment (99 days). Grain quality characteristics grown in no-tillage dry-seeding were similar to those grown in the other cultivation methods. These results indicate that no-tillage dry-seeding practice is comparable to conventional tillage system in terms of seedling establishment, growth, yields and grain quality.

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