• Proceedings of the Plant Resources Society of Korea Conference
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• 2020.08a
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• pp.60-60
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• 2020

본 연구는 수확 단계에 따른 작약 주요 품종의 수확후 품질 특성을 조사하여 품종별 적정 수확 시기를 구명하고자 수행하였다. 절화 작약은 '두체스', '레드참', '보울오브크림' 품종을 사용하였으며, 세 품종 모두 1, 2, 3, 4단계로 구분 지어 수확하여 실험에 사용하였다. 수확한 작약은 40cm로 재절단하여 chrysal professional III 용액이 담긴 화병에 꽃아 생체중, 증산량, 수분흡수량, 개화 단계 변화 등을 매일 조사하였고, 이를 통해 수분균형 및 절화 수명 등의 결과를 도출하였다. '두체스' 품종의 품질 특성 변화를 조사한 결과, 1단계에 수확한 절화의 만개소요일수는 5.5일, 만개유지일수는 2.9일, 총 절화수명은 8.4일로 다른 수확단계보다 1~3일 더 긴 것으로 조사되었으며, 생체중증가율 및 화경 변화 결과를 통해 1단계 수확 시에도 개화는 정상적으로 진행되는 것을 확인할 수 있었다. '레드참' 품종의 품질 특성 변화 조사 결과, 1단계에 수확한 절화의 만개소요일수는 7.9일, 만개유지일수는 3.3일, 총 절화수명은 11.2일로 다른 수확단계보다 1~4일 더 긴 것으로 조사되었다. '보울오브크림' 품종의 품질 특성 변화 조사 결과, 1단계 수확한 절화는 30% 수준만 만개하여 조기 수확에 따른 문제점이 확인되었지만, 2단계 수확한 절화는 개화와 만개 모두 100% 진행되었으며, 만개소요일수는 6.4일, 만개유지일수는 4.5일, 총 절화수명은 10.9일로 다른 수확단계보다 1~2일 긴 것으로 조사되었다. 본 연구 결과, '두체스' 와 '레드참' 품종의 적정 수확단계는 1단계, '보울오브크림' 품종의 적정 수확단계는 2단계가 적절할 것으로 판단된다.

• Proceedings of the Korean Society of Grassland Science Conference
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• 1999.06a
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• pp.81.2-82
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• 1999

본 연구는 사일리지용 옥수수의 정확한 수확시기를 결정하기 위하여 생육일수(출사 후 일수), 유효적산은도(GDD), 유선(milk line) 및 건물률을 비교하였다. 출사 후 수확시기(황숙초기)까지의 일수는 35-42일이 소요되었으며 파종시기가 지연될수록 단축되었다. 한편 유효적산온도는 출사 후 일수와는 반대로 높았다. 옥수수의 사초 수량과 사료가치를 함께 고려한 적정 수확시기를 건물률은 30∼36%이었으며, 이 시기 내에서 농가의 사정에 따라 적정 수화시기를 결정하는 것이 좋을 것으로 여겨진다.(중략)

• Journal of Bio-Environment Control
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• v.27 no.4
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• pp.349-355
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• 2018

This study was aimed at predicting the yield of paprika (Capsicum annuum L.) through analyzing the growth characteristics, yield pattern and greenhouse environment. In the greenhouse of the Gyeongnam area (667 m above sea level), the red paprika 'Cupra' and the yellow paprika 'Fiesta' were grown from July 5, 2016 to July 15, 2017. The planting density was $3.66plants/m^2$ and attracted 2 stems. During the cultivation period, the average external radiation of the glasshouse was $14.36MJ/m^2/day$ and the internal average temperature was controlled as $20.1^{\circ}C$. After 42 weeks of planting, the growth rate of 'Cupra' was 7.3 cm/week and that of 'Fiesta' was 6.9 cm/week. The first fruit setting of 'Cupra' appeared at 1.0th node and 'Fiesta' at 2.7th node. The first harvest of 'Fiesta' was 11 weeks after planting and 'Fiesta' was 14 weeks. Comparing the yield per 10 a until the end of the cultivation in July, 'Fiesta' was 19,307 kg, which was 2.4% higher than that of 'Cupra'. And the fruit weight ratio of over 200 g of 'Cupra' was 27.7% which was 7.7% higher than that of 'Fiesta'. The average required days to harvest after fruit setting of 'Cupra' was 72.6 days and 'Fiesta' was 63.8 days. According to the relationship between the average required days to harvest and the cumulative radiation (during from fruit setting to harvest), the more radiation increases the less required days to harvest increases after February. In terms of yield, 'Cupra' increased in yield as the cumulative radiation increased, while 'Fiesta' showed an irregular pattern. Cumulative radiation from fruit setting to harvest was negatively correlated with required days to harvest after February in both cultivars. But in relation to yield, there were difference between 'Cupra' and 'Fiesta'.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.69 no.1
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• pp.61-69
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• 2024

Considering the threats of climate change, this study was conducted to investigate the influence of temperature and day-length on soybean growth and yield when sown late in comparison to the optimal sowing time in the southern region of the Korean Peninsula. Sowing was executed in 10-day intervals, including on July 1, 10, 20 and 30 and August 10, considering that the optimum sowing time of the three soybean varieties with different ecotypes is June 20. Emergence rates did not differ significantly between late-sowing and optimal sowing in all ecotypes; however, the number of days to emergence, flowering, and maturity was smaller after late sowing. A multiple-regression approach was used to test the effect of temperature and day length on the number of growing days after late sowing compared to the optimal sowing time. This analysis revealed that the number of days required from sowing to flowering was positively correlated with both day length and temperature, and the number of days from flowering to harvest was positively correlated with day length and negatively with temperature. A multiple regression equation can be calculated as follows: the number of days required from sowing to flowering (Y) = 3.177 + (0.030 × (sum of day length + sum of temperature)), and the number of days required from flowering to maturity (Y) = 20.945 + (0.021 × (sum of day length + sum of temperature)). Multiple growth parameters were significantly correlated with yield components, depending on growing days. Optimal sowing resulted in the best yield, while later sowing decreased yield compared to optimal sowing. To avoid a significant decrease in yield, early-maturing species should be sown by July 20, while late-maturing species should be sown by July 10.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.29 no.3
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• pp.261-266
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• 1984

To determine the optimum harvesting methods for high yield and quality, harvesting time were tested from 30 to 45 days after heading with five days intervals, using combine, binder and knap-sack type reaper (KSTR) in harvesting machines. Under the consideration of moisture contents of grain, operating time, grain loss, harvesting cost and quality, the optimum time of barley harvesting for mechanization was 35 to 40 days after heading. Combine and binder were recommended as the suitable machines for barley harvest in the operating efficiency and harvesting cost.

• KOREAN JOURNAL OF CROP SCIENCE
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• v.53 no.3
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• pp.273-278
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• 2008

This study set out to investigate the changes to the growth, yield, and flavonoid contents of mungbean according to different seeding times from mid May to mid July in the southern region of Korea. Days to first flowering, days to first maturing, and cultivation period were shorter at later seeding time than earlier seeding time. But later the seeding time was, days from first maturing to first harvesting, days required between harvesting increased. Number of pods at first harvesting and yield of mungbean were highest when seeded at late June, showing increase in yield 14% more than at early June as standard seeding time. However number of seeds per pod and 1,000-seed weight at first harvesting were highest when seeded at mid July. The number of harvesting was smallest at two times when seeded at June or mid July. The contents of average vitexin and isovitexin in mungbean were highest in the order of mid July, late June, and mid May. In particular, their contents reached its highest point in the seeds of the second harvest. Considering the results of the cultivation period, yield, harvesting times, vitexin and isovitexin contents, the proper seeding time of mungbeans in the southern region of Korea will be from late June to mid July.

• Journal of Practical Agriculture & Fisheries Research
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• v.5 no.1
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• pp.8-12
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• 2003

The optimal log conditions of cultivation are as follows. 1) Log-length, 100~120cm 2) Hole-depth, 1~1.5cm 3) It takes 55~67 days for primodia induction is possible to harvest fruiting bodies for 6~7 months. Meanwhile, the total of 10 species pest including Trichoderma sp. occurred during the cultivation.

• The Korean Journal of Mycology
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• v.30 no.2
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• pp.109-112
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• 2002

Present experiments were conducted to determine the possibility of artificial culture with oak sawdust block of Phellinus gilvus Mushrooms, Mycelial growth in sawdust block (oak 90 + rice bran 10, V/N) after 25 days. It took 12 days to make fruitbody from burying of sawdust block to pinhead formation. The fruitbodies produced the total fresh weight 577 g (dried weight 97 g) in a block.

• Journal of Mushroom
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• v.8 no.3
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• pp.131-136
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• 2010

This study was performed to determine the optimal concentration of carbon dioxide, which effects mushroom growth and yield. It was shown that the periods for fruiting initiation, growth and harvest of Flammulina velutipes were increased when the $CO_2$ concentration was raised. In general, those characteristics were less affected in brown strains than in white ones. Especially brown strain ASI4103 was susceptible to changes in $CO_2$ concentration. Yields per bottle and individual mushroom weight also decreased in most strains when $CO_2$ levels increased. We were unable to designate any tendency in the number of fruiting bodies due to the large variation within each respective strain. Finally, water contents in the fruiting bodies were found to decline under high $CO_2$ concentrations.

• Journal of Bio-Environment Control
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• v.16 no.4
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• pp.338-343
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• 2007

This experiment was conducted to improve light environment of oriental melon cultivation in winter season. Three polyolefin (J-1, J-2 and J-3), two polyethylene (K-1 and K-2) films and K-3 commonly used in farmhouses, with different film thickness, ultraviolet ray interception and infrared ray absorption ratio were used. Heat conservation of J-2 was highest, compare to K-3, J-3 and J-1. Early growth of J-1, J-2 and J-3 were faster than K-3, and Days required to harvest of K-3 were shortened about 10 days. Marketable yield of K-3 was 991kg per 10a, those of J-1, J-2, J-3, K-1 and K-2 were increased 21%, 37%, 24%, 13% and 4% compare to K-3, respectively. Especially, harvesting of J-1, J-2, J-3 and K-1 were focused on early (50%) and middle stage (40%). Polyolefin with higher heat conservation improved growth and harvesting in early and shortened days to harvesting in winter season.