• 한국환경복원기술학회지
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• 제13권2호
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• pp.72-79
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• 2010

This research was initiated to investigate the revegetation characteristics under seedling types of native woody plants on a disturbed slope. 4 different seedling types of woody plants (control, unit seedling plot, nature seedling plot, pot seedling plot) with the same woody plants (Rhus chinensis Mill, Albizzia julibrissin Duraz., Quercus acutissima Carr., Pinus densiflora S. et Z.) were treated with 3 replications on the experimental disturbed slope. Data such as the died number of native woody plants, growth height and visual quality were analyzed. The died number of plants were high in unit seedling plot when compared to the rest plots of seedling types. From the standpoint of died plant species, the died number were high in Rhus chinensis and Albizzia julibrissin whereas the died number were low in Quercus acutissima and Pinus densiflora. That's because we used 1-year old seedlings of Rhus chinensis and Albizzia julibrissin and 3-year old seedling Quercus acutissima and Pinus densiflora. This result indicated that the died reason of native woody seedling was not species but seedling age. Both growth height and visual quality were ranked first in the pot seedling plot, second in the nature seedling plot, third in the unit seedling plot, and last in the control plot, respectively. However, the difference of both growth height and visual quality in each seedling plot was not observed on the 11 months after planting. Especially, the main reason of low rooting and growth value in the unit seedling plot was due to wooven fabric outer crust of pot that obstruct seedling rooting into the soil. We concluded that pot seedling of native woody plants was effective in the viewpoint of the ecological disturbed slope revegetation.

• Journal of Ginseng Research
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• 제22권4호
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• pp.294-298
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• 1998

This study was conducted to investigate the effects of growth characteristics and mineral contents of ginseng seedling grown in different locations on ginseng growth and root yield. Ginseng seedling produced in 16 farmers' field at the semi-Yangjik seedbed were planted and cultivated in a field with same cultural practices. Missing plant was increased with increased year of ginseng age, especially severe at 5-year-old ginseng. Rate of missing plant was different among the origins of the seedling, even with the same weights. Negative correlation was noted between the missing rate of 3-year-old ginseng plants and NH4-N content of the seedling, but positive correlation between the missing rate and K2O and Ca contents of the seedling. Root yield of 6-year-old ginseng was also affected by the origins of ginseng seedlings. Root yield was high in ginseng plant from 0.6∼0.9 g see dings compared to those from over 0.9 g seedlings.

• 한국산림과학회지
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• 제98권3호
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• pp.331-338
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• 2009

본 연구에서는 상수리나무 용기묘와 노지묘를 대상으로 시비처리에 따른 광합성 특성, 엽록소 형광반응, 엽록소 함량 및 생장 특성을 조사 분석하였다. 상수리나무 용기묘와 노지묘 모두 시비 처리별 광합성 능력 및 광화학 효율은 1,000배액 시비 처리구에서 가장 높았으며, 엽록소 함량도 1,000배액 시비 처리구에서 가장 많았다. 생장특성에서는 1,000배액 시비 처리구에서 높은 상대생장률과 물질생산량을 보였으며 엽면적도 같은 경향을 보였다. 모든 시비 처리구에서 전반적으로 용기묘가 노지묘보다 우수한 광합성 능력과 광화학 효율, 엽록소 함량 및 생장을 보였다.

• 한국작물학회지
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• 제50권1호
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• pp.28-31
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• 2005

To identify salt-tolerance characteristics of corn seedling was treated in solution of 0, 50 and 100 mM NaCl of hydroponic cultivation. In photosynthesis of corn seedling, there was no large difference between 50mM and 0 mM NaCl solution, however, in 100 mM NaCl solution, the tolerance gradually decreased to $76\%,\;49\%,\;and\;31\%$ after one day, four days, and seven days, respectively, in comparison to 0 mM NaCl solution. Osmotic potential of corn in seedling period was significantly decreased with increasing saline level, however, free proline content in the plant on the ground was significantly increased with increasing saline level and with the lapse of time. In terms of correlation among major characteristics, there was a highly significant positive difference between osmotic pressure potential and photosynthesis, However, highly negative correlation was found between osmotic pressure potential and free proline content. In addition, it was expected that young seedling of corn with saline tolerance may be utilized in the transplantation in salt-accumulated land. Based on above-shown result, in terms of saline tolerance of Chalok-2 variety, growth suppression was serious with 100mM NaCl solution. However, growth was expected that seedling growth would be favorable under 50 mM NaCl solution.

• 농업과학연구
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• 제5권2호
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• pp.49-55
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• 1978

수도(水稻)의 성묘기계이앙(成苗機械移秧)에 알맞은 건묘(健苗)를 육성(育成)해 내고자 산파식(散播式)인 mat묘(苗)와 조파식(條播式)인 단책묘(短冊苗)의 우열(優劣)을 여러 파종량하(播種量下)에서 비교검토(比較檢討)한 바 다음과 같은 결과(結果)를 얻었다. 1. 20일묘(日苗)에서는 파종양식간(播種樣式間)에 생육상(生育相)과 묘소질(苗素質)의 차이(差異)를 별반 인정(認定)할 수 없었으나 30일묘(日苗)에서는 단책묘(短冊苗)가 mat묘(苗)보다 평균생장속도(平均生長速度)와 상대생장율(相對生長率)이 다같이 크고 묘(苗)의 건물중(乾物重), 탄수화함량(炭水化含量) 및 건물중대초장비율(乾物重對草長比率)도 무겁고 커서 건묘(健苗)의 소질(素質)을 가지고 있었다. 그러나 40일묘(日苗)에서는 그차이(差異)는 축소(縮小)되었으며 묘령(苗令)의 진전(進展)은 거의 인정(認定)할 수 없었다. 2. 묘(苗)의 생장량(生長量)은 박파(薄播)일수록 많고 밀파(密播)와의 차이(差異)는 육묘일수(育苗日數)가 연장(延長)됨에 따라 커졌으며 밀파(密播)의 한계(限界)는 단책묘(短冊苗)에서는 묘상자당(苗箱子當) 200cc이고, mat묘(苗)에서는 250cc 정도(程度)였었다. 3. 단책묘(短冊苗)는 mat묘(苗)보다 초장(草長)과 엽령(葉令)등의 변이계수(變異係數)가 큰 것으로 보아 묘(苗)의 균일성(均一性)은 mat묘(苗)보다 결여(缺如)되는 것 같으며 앞으로 검토(檢討)를 요(要)할 것으로 사료(思料)된다.

• 한국작물학회지
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• 제37권3호
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• pp.230-236
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• 1992

이앙기를 달리 하였을 때 어린모와 기계이앙 25일묘, 손이앙 성묘의 묘소질과 본답 생육 차이을 구명하고자 금오벼와 팔공벼 및 동진벼를 공시하여 4월 20일부터 7월 20일까지 15일 간격으로 7회 처리한 결과를 요약하면 다음과 같다. 1. 이앙기별 육묘방법에 따른 묘의 엽수 변화는 손이앙묘>25일묘>어린모 순으로 많았고, 이앙기별로 보면 어린모는 이앙기에 따른 차이가 없었으나, 25일묘는 4월 20일 이앙부터 6월 5일 이앙까지 증가 경향이었으며 그 이후는 근소한 차이를 보였고, 손이앙묘에서 동진벼는 6월 5일까지, 팔공벼와 금오벼는 6월 20일 이앙까지 엽수가 증가하는 경향이었다. 2. $\alpha$-naphthylamine산화력에 의한 근활력과 신근발생량은 어린모>25일묘>손이앙묘 순으로 높았다. 3. 최고분얼기와 유수형성기의 관계는 어린모와 25일묘에서 금오벼는 4월 20일 이앙시 최고분얼기후에 유수가 형성되었으나, 5월 20일부터 7월 5일 이앙까지는 최고분얼기와 같은 시기에, 7월 20일 이앙에서는 최고분얼기 전에 유수가 형성되었다. 한편, 팔공벼는 5월 20일 이앙까지, 동진벼는 7월 5일 이앙까지 최고분얼기 후에 유수가 형성되었다. 4. 어린모와 25일묘의 이앙후 결주율은 이앙기 및 품종에 관계없이 5% 이내로 나타났다.

• Journal of Ecology and Environment
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• 제35권2호
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• pp.73-78
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• 2012

$Calotropis$ $procera$ L. is a perennial shrub distributed in saline areas of deserts of South Asia. Salt stress is a very challenging subject in arid and semi-arid areas. Germination stage is very sensitive and many plants do not germinate in saline soil. The objective of this study was identifying the salinity effect on seed germination of $Calotropis$ $procera$ L. The experimental design was a complete randomized block design with NaCl and $CaCl_2$ at five levels of isobar concentrations: 0.0, -0.01, -0.05, -0.1, and -0.15 MPa. Osmotic potential had significant effects ($P$ < 0.01) on germination percentage, germination rate, shoot length, root length, and seedling dry weight. All seedling characteristics decreased with decrease in osmotic potential. Shoot length and root length decreased more than the seedling characteristics. Germination was completely inhibited in -0.1 Mpa. Priming with NaCl and $CaCl_2$ (-0.1 MPa) for four days had significant effects ($P$ < 0.01) on the germination percentages. Priming improved the seedling characteristics in all samples, especially in -0.05 Mpa, but a decrease with decrease in osmotic potential.

• Journal of Biosystems Engineering
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• 제24권1호
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• pp.51-58
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• 1999

A color image processing algorithm was developed to assist the robotic plug-seedling transplanter. The algorithm was designed to identify and locate empty cells in the seedling tray. The image of pepper seedling tray was segmented into regions of plant, frame and soil using thresholding technique which utilized HSI or RGB color characteristics of each region. The detection algorithm was able to successfully identify empty cells and locate their two-dimensional location. The overall success rate of the algorithm was about 88%.

• 한국약용작물학회지
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• 제19권4호
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• pp.233-237
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• 2011

This study was carried out to investigate the seedling establishment and yield of direct-sown Platycodon grandiflorus seeds cultured by three ridge width, 0.4, 0.8, and 1.2 m and four mulching materials, rice straw, rice bran, black plastic film, and no mulching in upland. Seedling establishment rate (70%) was the highest in rice straw mulched plot of 500 seeds/$m^2$ sowed and root yield after one year was also the highest in rice straw mulched treatment and followed by rice bran, no mulching, and black plastic film treatment. In this result, ridge width 120cm and rice straw mulching combined treatment was best for getting the highest seedling establishment ratio and seedling numbers per area. However, ridge width and mulching materials should be considered soil moisture content and weed population for saving labor cost.

• 한국작물학회지
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• 제47권6호
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• pp.448-452
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• 2002

벼 자동화 육묘시설에서 파종기별 적정 파종량을 선정하기 위하여 실험한 결과를 요약하면 다음과 같다. 1. 파종기에 따른 묘특성은 상자당 파종량이 증가할수록 초장은 커지는 경향을 보였으나, 묘충실도는 감소하였다. 2. 이앙기별 파종량에 따른 본답 생육 특성은 파종기에 관계없이 파종량이 증가할수록 이앙 초기에는 초장은 커지고 분얼수는 증가하였으나 이앙 40-50일 이후부터는 파종량간에 큰 차이를 나타내지 않았다. 3. 파종량에 따른 수량성은 5월 25일 이앙구에서는 파종량 간에 유의성이 없이 200g 파종구에서 수량이 가장 높았으며, 2모작인 6월 20일 이앙의 경우는 200-250g 파종까지는 유의성이 없었으나, 200-250g 파종구와 300g 파종구에서는 유의성 있는 차이를 보였다.