• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.02a
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• pp.236-241
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• 2002

진공노즐방식의 파종기로 파종작업할 경우 박과채소의 대목으로 사용되고 있는 대립종자들의 최대파종율을 얻기위하여 참박, 특토좌, 흑종호박 종자에 대한 파종시험을 실시하였다. 1) 적정한 노즐구경과 홉착부압은 참박종자가 1.5mm, 7.97kPa, 특토좌종자가 1.5mm, 10.63kPa, 흑종호박종자가 2.0mm, 5.31kPa과 1.5mm, 13.28kPa로 나타났다. 2) 최적작동조건에서 참박종자, 특토좌종자 및 흑종호박 종자의 최대 파종율은 97.6%, 98.8% 및 97.6%로 나타났다. 3) 종자가 커지고 무거워짐에 따라 노즐의 구경이 큰 것이 유리한 것으로 나타났는데, 대목으로 사용되는 종자에서는 1.5mm노즐을 범용으로 사용가능하다는 결론을 얻었다. 4) 노즐개수가 많아지면 부착압력이 낮을 경우에는 파종율에 차이가 있었지만 부착압력이 높아지게 되면 파종율의 차이는 약간 낮아졌다. 5) 참박, 특토좌, 흑종호박 종자의 최대파종율을 나타내는 흡착부압 P = η.4W/$\pi$d$^2$로 나타낼 수 있고 여유계수 η ≒ 10으로 나타났다.

• Journal of Life Science
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• v.13 no.4
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• pp.428-432
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• 2003

This study was carried out to develop and investigate integrated mechanization system for culture of carrot. Compared with the conventional hand planting, use of a mechanical planter for pelleted seeds resulted in a saving of planting time by 225 hours. An additional saving of 460 hours was obtained for thinning the seedlings. Besides seeds could be saved by 72%, planting and thinning be done only in 35 hours per ha field when the pelleted seeds were planted with a planter. Work hour reduced by adopting the mechanical planting of pelleted seeds sharply contrasted to that of 720 hours required for hand-planting the thinning hours, resulting in a reduction of labor by more than 95%. SMP followed pelleting tended not only to increase the percentage of seedling emergence in the field but to induce an a day earlier germination.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.32 no.3
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• pp.287-293
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• 1987

To find out the effects of seed maturity and seeding rate of two planting times on the seed emergence and silage and seed yields of rye, a local variety 'Paldanghomir' harvested 30 and 45 days after heading(DAH) were planted at five seeding rates on October(optimum) and November(late) in 1985. At the optimum planting, number of seedlings per unit area and number of tillers per plant were affected by seeding rate, but not by the seed maturities. However, at the late planting, number of seedlings per unit area and number of tillers per plant wer higher in the seed harvested 45 DAH, and they were not correlated with seeding rate in both seeds harvested 30 and 45 DAH. Heading date was 2 or 3 days earlier in the seeds harvested 45 DAH in both planting times. Silage yield was higher at the optimum planting and increased as seeding rate increased in both planting times. Number of spike and 1000~seed weight were higher at the optimum planting than late planting and higher in the seed harvested 45 DAH than 30 DAH in late planting, but were not different among seeding rates. Seed yield at optimum planting showed no difference between seed maturities and among seeding rates, and recommandable seeding rate was 600 seeds per $m^2$. At late planting the seed yield of the seed harvested 45 DAH in the seeding rate over 750 seeds per $m^2$ approached to the yield of the optimum planting. The seed harvested 30 DAH was unstable because of extremely low emergence rate and yield even at the higher seeding rate in late planting. planting.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.07a
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• pp.84-89
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• 2002

소규모의 채소재배농가에서 육묘포트에 종자를 파종하는 작업은 대부분 손으로 파종하고 있으며, 중규모 이상의 채소재배농가에서는 간이파종기를 이용하거나 육묘공장에서 모를 구입하여 사용하고 있다. 간이파종기는 진공흡인력을 이용하는 종자흡인식과 평판의 구멍에 종자를 가두어놓았다가 낙하시키는 구멍배종방식 등이 주로 이용되고 있다(한국농업기계학회, 1998). 간이파종기는 대부분 플러그 육묘트레이에 사용할 수 있도록 되어 있으며, 포트수가 다른 플러그 육묘트레이를 사용하려면 새로운 포트규격에 맞는 파종장치를 구입하여야 하기 때문에 추가비용이 소요된다. 소규모 채소재배농가에서는 25, 36, 49공 등의 여러 가지 규격의 연결포트를 사용하고 영농규모가 작기 때문에 간이파종기를 구입하는 것이 부담스러운 실정이다. (중략)

• Korean Journal of Medicinal Crop Science
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• v.11 no.5
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• pp.347-351
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• 2003

This experiment was carried out to study the optimal chilling period for breaking the physiological dormancy of dehisced E. senticosus seeds and to investigate the critical seeding date in Kangwondo. Storage at $5^{\circ}C$ for 85 days was most effective in breaking dormancy of dehisced seeds, but didn't germinated synchronously. Only 28.1% of undehisced seeds germinated after 125 days of low temperature storage. For improving seedling survival rate in the field, 50% shading was more effective than 30% shading. Delayed seeding date resulted in decreased seedling fresh weight, dry weight, leaf area and root length, but seeding date has no significant affecte on stem length.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.33 no.1
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• pp.54-58
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• 1988

To define natural embryo growth and germination of the Korean ginseng (Panax ginseng C.A.Meyer) seed, freshly harvested and depulped seeds were seeded on nursery bed at Aug. 5 without stratification. At 100 days after seeding, embryo/endosperm length ratio of the seeds in nursery bed was higher than that of the seeds which were stratified with conventional method for 100 days. And also there was no significant difference between dehiscence ratio of the seeds in nursery bed and that from stratification with sand. The germination ratio of the ginseng seeds seeded without stratification at Aug. 5 was about 57% in average of 2 years and was not significantly lower than that of the seeds seeded after stratification at Nov. 15. And there were also no significant differencies of plant growth after germination between the ginseng seedlings from two seeding methods.

• Korean Journal of Plant Resources
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• v.14 no.2
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• pp.94-101
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• 2001

This study was intended to evaluate the relationship environmental condition and growth characteristics of seed treatment seed in direct sowing with different sowing date, and to suggest new cultivation model. The emergence percentage and hours were down as the delayed sowing date. Optimum sowing time was Sep. 10, and sowing must end before Sep. 20 for safety yield. When did sowing ended before Sep.20 in direct sowing cultivation, the seedling growth(SG) and No of roots of direct sowing seedling were larger than transplanting cultivation . At March 8 evaluated seedling, the SG of direct sowing seedling was higher than transplanting, and at Sep. 2(1 those were similar. The missing plant rate in transplanting cultivation was under 3 %, and that in direct sowing cultivation was about 13∼18%, and the extent were sever as delayed sowing date. The bulb fresh weight was decreased as delayed sowing, and those in direct sowing and transplanting cultivation were 230, 217g, respectively. The blot rate was high in direct sowing cultivation, and that was decreased as delayed sowing. The yield in direct sowing and transplanting cultivation were 5,134, 5,300kg, respectively, and those were decreased as delayed sowing. The average yield in early and medium-late maturity cultivars were 3,750, 4,908kg, respectively, and Sonic was highest yield in early maturity cultivars and Nongwoodego was highest in medium-late maturity cultivars. The emergence weed were 9 species as Loportea bulbifera Weddell and others, and Loported bulbifera Weddell, Digitaria violascens Link and Persicaria longiseta Kitagawa were dominant species in direct sowing cultivation with black hole vinyl mulching

• Korean Journal of Plant Resources
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• v.14 no.1
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• pp.60-64
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• 2001

This study was carried out to investigate effects of sowing dates and method on major agronomic characteristics of Dendropanax morbifera $L_{EV}$. in southern area of Korea. The number of days from sowing to emergence was recognized liner negative correlation between sowing days. Dendropanax morbifera was sowed at seven different dates(from Dec.20 to Feb.20 at 30 days interval, from Mar, 1 to Apr. 15 at 15 days interval) in pot culture. In sowing date at Mar. 15, germination rate and early growth were good in pot. Dendropanax morbifera was sowed at five different dates(from Dec.20 to Apr.15 at 15 days interval) in field culture. In sowing date at Apr.15, germination rate and early growth were good in field culture.

• Journal of The Korean Society of Grassland and Forage Science
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• v.34 no.2
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• pp.103-107
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• 2014

Tall fescue (Festuca arundinacea Schreb.) is one of cool-season adapted perennial grass species and has been cultivated worldwide as a important forage and lawn grass. In this study, we evaluated the seed production of new tall fescue cultivar, 'Purum', which was cultivated in Korea. Agronomic aspects of tall fescue were determined using seed production and forage nutritive value of straw at the National Institute of Animal Science, RDA from 2012 to 2013. The heading date according to the seeding time displayed 2~3 days differences. The harvested seed yields were the largest (1,711 kg/ha) when seeding date at September $17^{th}$, whereas it decreased when planted ten days earlier or later than at that time. The thousand-grain weight of gathering seeds was 2 g, and the germination rate was 80 to 83% showing no significant differences among the different seeding times. The yield of fresh weight and dry matter were the largest (63,556 kg/ha and 16,926 kg/ha, respectively) when planted at September $17^{th}$. The dry matter yield was gradually decreased with delaying seeding time as 10 days period. However, nutritive values of straw did not showed significant differences.

• Journal of The Korean Society of Grassland and Forage Science
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• v.40 no.2
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• pp.73-79
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• 2020

This study was conducted to develop a technique for the stable production of Italian ryegrass(IRG) seeds in reclamation sites. Harvesting 35 days after heading in Autumn resulted in the highest production, an average of 2,232kg/ha. The production yield decreased due to seed loss as harvesting was delayed to 45 and 55 days post-heading. For the harvested 35 days post-heading, under growing rice sowing resulted in 80% seed yield of after rice sowing's; spring sowing resulted in 40%. After rice sowing using the domestic IRG seeds of 30kg/ha produced the highest seed yield of 2,507kg/ha. The highest straw yield has resulted when using the imported IRG seeds of 20kg/ha for after rice sowing 35 days post-heading fresh weight 36,667kg/ha, dry weight 14,500kg/ha, and TDN weight 7,895kg/ha.