• Journal of Bio-Environment Control
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• v.23 no.2
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• pp.139-143
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• 2014

This study was conducted to investigate the effect of cultivation period and rockwool block size on the growth and early yield of paprika transplants grown in a closed transplant production system. Paprika seeds were sown and germinated in three different size of rockwool blocks ($45{\times}40{\times}35$, $70{\times}70{\times}60$, $100{\times}100{\times}65mm$) and cultivated in a closed transplant production system for 23, 30, and 37 days after sowing. Paprika transplants were cultivated using $100{\times}100{\times}65mm$ rockwool blocks in a greenhouse following a conventional and typical production method for comparing with the growth of paprika transplants grown in a closed transplant production system. Also, we transplanted paprika transplants grown for 23, 30, and 37 days in a closed transplant production system and greenhouse to rockwool slabs and investigated fresh weight of fruits and yield 125 days after sowing. The growth of paprika transplants grown in $70{\times}70{\times}60mm$ rockwool blocks in a closed transplant production system was highest, and the quality of paprika transplant grown in a closed transplant production system was better than in a greenhouse. Rockwool block size and cultivation period in a closed transplant production system did not affect fresh weight of fruits, however, yield was largest when paprika transplants were cultivated using $70{\times}70{\times}60$ and $100{\times}100{\times}65mm$ rockwool blocks for 23 days in a closed transplant production system. These results suggest that decreasing rockwool block size and cultivation period can be strategically used to enhance transplant quality and yield of paprika, as paprika transplants were cultivated in a closed transplant production system.

• Journal of Bio-Environment Control
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• v.7 no.3
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• pp.206-213
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• 1998

This experiment was conducted to investigate the effects of concentration of NO$_{3}$$^{[-10]}$ , $K^{＋}$ and $Ca^{＋＋}$ in nutrient solution on the seedlings growth of ‘Mudeungsan’watermelon. Seeds were sown on March 16, 1997. NO$_{3}$$^{[-10]}$ , $K^{＋}$ and $Ca^{＋＋}$ was treated with three different levels, respectively, NO$_{3}$$^{[-10]}$ = 106, 206, 406ppm; $K^{＋}$ = 150, 200, 400 ppm; $Ca^{＋＋}$ = 150, 200, 400 ppm. Plant growth was investigated at four-days interval in 10 days after treatment. Increasing N concentration in the nutrient solution increased the plant height, leaf area, number of leaves, fresh and dry weight of shoot while high concentration of K and Ca in the nutrient solution decreased the seedling growth in terms of leaf area, leaf dry weight. The uptake of N, K and Mg in petiole sap was positively affected by the adding of 206 ppm of nitrate, 150 ppm of potassium and 200 ppm of calcium levels, respectively. The P and Ca uptake in petiole sap was not affected by the N and K concentrations in the nutrient solution while K concentration above 200 ppm decreased the N and Mg content in petiole sap. High concentration of Ca in the nutrient solution increased the Ca content in petiole sap while Ca concentration above 200 ppm decreased the N content.

• Korean Journal of Agricultural Science
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• v.5 no.2
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• pp.49-55
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• 1978

In order to get healthy seedling of rice suitable for rice transplanter, the growing characteristics of the seedling grown under different growing days and sowing densities were invesigated and the results obtained were summarized as follows; In the 20 days old seedling, the difference of growing state of seed ling and its characteristics between the two types of nursery bed was not found, but for the 30 days old seedling, both of the crop growth rate and the relative growth rate on the band-type nursery bed appeared higher than those on the mat-type nursery bed. And also, "the dry weight, the content of cardohydrate and the ratio of dry weight to plant height of the seedling grown on the band-type nursery bed were much higher than those on the mat-type nursery bed, however the amount of difference of seedling characteristics between two types of nursery bed was decreased for 40 days old seedling and leaf number was not increased. The amount of the seedling growth was increased with less density of sowing and for the difference between the higher and the less density, the difference getting bigger with the longer nursery days. The maximum density of sowing was approximately 200cc per nursery case on the band-type nursery bed and 250cc per nursery case on the mat-type nursery bed. It was seemed that the growing uniformity of the seedling grown on the mat-type nursery bed was better than that on the band- type nursery bed, As the coefficient of variation of the plant height and the leaf numbers of the seedling grown on the band- type nursery bed was higher than that on the mat-type nursery bed.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2019.04a
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• pp.88-88
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• 2019

현삼과(Scrophulariaceae)의 둥근산꼬리풀(Veronica rotunda Nakai)은 흰색의 꽃이 총상화서로 피며, 관상용으로 쓰인다. 또한, 접선골도라 하여, 전초를 약용하고 활혈, 지혈, 청폐열, 화간위에 효능이 있는 자생식물이다. 본 연구는 둥근산꼬리풀의 포트 재배방법 확립을 위하여 2018년 5월 15일에 파종하여 생산된 유묘를 7월 16일에 정식하여 10월 15일까지 약 14주 동안 수행하였다. 식재용기 실험은 비닐포트[3치($7{\times}7cm$), 4치($9{\times}8.5cm$)]와 플라스틱 화분[8호($7{\times}7cm$), 10호($9{\times}9cm$), 12호($10.5{\times}10.5cm$)]를 이용하였고, 토양 종류[중화 피트모스:펄라이트(3:1, 4:1), 마사토:중화 피트모스(2:1, 3:1)], 묘의 소질[파종 립수(1, 2, 4, 6립), 파종 용기(162, 200, 288구 트레이)] 등의 연구를 진행하였다. 대조구는 플라스틱 화분 10호에 원예상토를 충진하고 200구 트레이에 4립씩 파종하여 생산된 1셀을 정식하였다. 연구의 결과, 식재용기에 따른 둥근산꼬리풀의 생육은 플라스틱 12호 화분에서 가장 양호하였으며, 토양의 양이 많을수록 전반적인 생육이 증가하였다. 토양 종류별로는 원예상토에서 재배한 처리구에서 양호한 생육을 보였다. 중화 피트모스와 펄라이트 3:1 혼용토의 경우, 원예상토와 전반적인 생육에 큰 차이가 없어 이용가치가 있을 것으로 판단된다. 한편, 피트모스의 비율이 높은 4:1 혼용토에서는 비교적 생육이 억제되었으며, 잎이 황화되었다. 마사토와 중화 피트모스의 혼용토는 원예상토에 비해 왜화되는 결과를 보였으며, 측지수, 마디수, 엽수에는 큰 영향을 주지 않았다. 그러나 개화율을 감소시키는 결과를 보였다. 셀당 파종한 종자의 양을 달리하여 생산된 유묘를 정식하여 재배한 결과, 전반적인 생육은 1립 파종구에서 양호하였다. 한편, 파종량이 많을수록 초장, 절간장이 감소하며, 포트당 마디수, 측지수 및 개화율이 증가하여, 본 연구의 목표인 관상적 이용에 적합한 것으로 판단된다. 파종용기별 생산된 유묘이식 결과, 초기생육이 왕성할수록 후기생육도 우수하였다. 162구 생산묘 정식구는 다른 처리구보다 전반적으로 생육이 왕성하였으며, 다음으로 200구 순이었다. 파종용기에 따른 묘의 크기는 정식 후의 개화율에 유의적인 차이가 없었다. 따라서, 둥근산꼬리풀의 재배는 플라스틱 화분 12호에 원예상토를 충진하여 162구 트레이에 셀당 6립 파종하여 생산된 유묘를 정식하는 것이 분화용 재배에 효과적인 것으로 생각된다. 한편, 재배에 이용되는 토양의 종류에 따른 비율 및 개화촉진 등의 추가적인 연구가 필요하다.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.65 no.2
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• pp.156-160
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• 2020

Emergence and early growth changes of stratification condition of tea (Camellia sinensis) seeds were investigated in 7 treatments (control, pH 4, pH 10, 70% ethanol (EtOH), 10 mM H₂O₂, 100 mM H₂O₂, and physical shock (5.9 J)). Ethanol treatment was toxic and did not induce emergence. The emergence rate was 36.7% in the control, 26.7% under pH 10, 46.7% under pH 4, 48.3% under physical shock, 51.7% under 10 mM H₂O₂, and 65.0% under 100 mM H₂O₂ treatments. It was higher by approximately 178% in the H₂O₂ treatment as compared to the control. Plant height was 6.5 cm in the control, 6.6 cm under pH 10, 7.6 cm under pH 4, 7.8 cm under physical shock, 8.3 cm under 10 mM H₂O₂, and 9.1 cm under 100 mM H₂O₂ treatments. Leaf length and leaf width were also higher under the H₂O₂ treatment. Therefore, hydrogen peroxide treatment induced emergence and increased the uniformity of early growth.

• Journal of Bio-Environment Control
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• v.28 no.3
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• pp.185-196
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• 2019

Abstract. This research was conducted to figure out the optimal size of the plug cell and seedling raising period in 'Nongwoo' and 'Nonghyeop' cultivars. In the first experiment on effect of plug cell size on growth of squash, seedlings were transplanted into hydroponic cultivation beds at different growing stages: Those in 32-cell trays with 3-4 true leaves at 25 days after sowing, those in 50-cell trays with 2 true leaves at 15 days after sowing, those in 105-cell trays just before a true leaf development, and those in 162-cell trays with only cotyledons at 8 days after sowing. In the second experiment on effect of seedling raising period on growth of squash, it was conducted to have different sowing dates. But the same transplanting date, based on the results of Experiment 1, and compared the differences in growth and fruit productivity as affected by plug cell size in the same way with experiment 1 including the cultivars and environmental conditions. After setting the transplanting date in advance, the number of days for sowing were calculated back for each treatment. In the first experiment, plant height was the greatest in 105-cell trays followed by 162, 50 and 32-cell trays in both cultivars. The best fruit quality was found in different treatments depending on the cultivars, although it was the lowest in 32-cell trays in both cultivars. The fruit quality was not significantly different among those from cell sizes. Therefore, when raising seedlings in 105-cell trays, the period of raising seedlings can be shortened as compared with the conventional 32-cell trays, and this change could reduce the workforce required for growing and transplanting seedlings. In the second experiment, after transplanting, shoot height and leaf width in the first measurement in both cultivars were greater in the 32-cell treatment. However, the last measurement after four weeks showed no significant difference in plant height, but significantly greatest leaf width in the smallest cell treatment, even as compared with that in 32-cell treatment. In case of 'Nongwoo', length and weight of the first harvested fruit showed the highest values in the treatment of 105-cell trays. In case of 'Nonghyeop' the 162-cell treatment along with the 105-cell treatment showed greatest length and weight of the first fruits. From these results, zucchini plug seedlings can be raised in plug trays with reduced cell sizes than the conventional 32-cell trays with improved fruit productivity.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.23 no.1
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• pp.5-13
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• 1978

An experiment was carried out to find out effective heading date and period of limited ripening in different regions of climatic conditions by sowing date and length of nursery stage of a new variety Milyang 23. Since varieties of Tongil line have a character of premature heading, these do not show the symptom of senescent even though length of nursey stage was delayed. And the delay of heading date is due to late transplanting date, on the other hand, length of nursery stage delayed.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.58-58
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• 2018

본 연구는 관상식물인 갯까치수염의 분화용 재배기술을 개발하기 위하여 실시하였다. 종자를 이용하여 육묘된 유묘를 사용하여 분화용 포트의 크기, 상토 혼합조성, 기비처리, 유묘의 소질 등의 이식조건과 추비농도, 차광정도, 왜화제 및 적심처리 등의 재배, 관리조건에 대한 생육효과를 2017년 7월 31일부터 10월 9일까지 약 10주간 조사하였다. 갯까치수염의 분화용 재배를 위해서, 피트모스:펄라이트(3:1) 혼합 용토에 $300-200-200mg{\cdot}L^{-1}$(N-P-K)의 비료분을 첨가한 토양을 이색칼라 10호 화분에 충진하여 코트비료 10알을 기비로 시비하고, 200구 트레이에 셀당 2립씩 파종된 묘를 이식묘로 사용하는 것이 갯까치수염의 생육에 가장 효과적이었다. 재배 및 관리방법으로는 차광처리는 하지 않고 재배하는 것이 생육에 좋으며, $250mg{\cdot}L^{-1}$ hyponex를 추비하고 왜화제로 $500mg{\cdot}L^{-1}$ daminozide를 처리하는 것이 갯까치수염의 분화재배에 적합하였다. 또한, 재배기간이 10주 정도일 때는 적심을 하지 않는 것이 분화용 생산에 효과적일 것으로 판단되었다. 본 연구 결과는 다양한 활용성을 가진 야생 초화류의 이용성 및 부가가치 향상을 위한 대량생산 방법의 기초자료로 활용될 수 있을 것으로 생각된다.

• Korean Journal of Organic Agriculture
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• v.14 no.1
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• pp.85-95
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• 2006

The investigation of the effect of the deep sea water in different concentration (0%, 10%, 20%, 30%, 40%) on the inhibition of growth, fresh weight, dry weight of the tomato, hot pepper, cucumber plug seedlings were conducted. As the concentration of the deep sea water was higher, the greater inhibition was noticed. The height were decreased at the rate of 8%, 25%, 32% in tomato, 9%, 26%, 27% in hot pepper, and 21%, 50%, 58% in cucumber plug seedlings as compare to local check. The fresh weights were decreased highly, as the concentration of the deep sea water increased. Tomato seedlings showed the decrease rate of 12%, 23%, 33% at above the ground part of plants, and 2%, 30%, 52% at under the ground parts. Likewise, Hot pepper seedlings showed the decrease rate of 1.1%, 5.7%, 15.4% at above the ground part of plants, and 22.1%, 25%, 47.1%, respectively at under the ground parts. The fresh weight of cucumber was decreased at the rate of 8.1%, 36%, 51% in the above the ground, and 6.2%, 11%, 65% at the under the ground parts. In tomato, hot pepper, and cucumber seedlings, the dry weight was decreased as the concentration of deep sea water was increased. Thirty percent of deep sea water treatment reduced the dry weight of the seedlings as half of the control seedlings. One of the important factors of the seedling quality is compactness. Compactness was highest at 20% deep sea water in all the three crop seedlings.

• Korean Journal of Medicinal Crop Science
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• v.13 no.4
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• pp.133-137
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• 2005

Experiments were conducted to find the optimal acclimatization conditions for Eleutherococcus senticosus plantlets regenerated from bioreactor cultured somatic embryos, various acclimatizing conditions were compared regarding both survival rate and growth of the plantlets. Among the various temperature and artificial soil tested, the highest survival rate (88%) was observed when plantlets were acclimatized in Klasmann bed soil at $10^{\circ}C$ When in vitro plantlets directly transplanted to field environment, shading treatment was necessary and 50% shading was more effective than 30% shading. Transplanting season were also important for successful acclimatization of in vitro cultured plantlets, transplanted on March 20 with 50% shading exhibited the best survival rate and further growth.