• Title/Summary/Keyword: Harvest Time

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Change of Seed Yield, Germination Rate and Hard Seed Rate with Harvest Time in Hairy Vetch (Vicia villosa Roth) (헤어리베치 수확 시기에 따른 종자 수량, 발아율 및 경실종자 비율 변화 양상)

  • Ku, Ja-Hwan;Kim, Min-Tae;Son, Beom-Young;Lee, Jin-Seok;Kim, Jung-Tae;Hwang, Jong-Jin;Baek, Seong-Bum;Moon, Jung-Kyung;Kwon, Young-Up
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.32 no.2
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    • pp.157-164
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    • 2012
  • This experiment was conducted to investigate an optimum harvest time for hairy vetch (HV) seed production. The seeds were harvested at 5 times, 35, 42, 48, 54, and 58 days after flowering (DAF) in 2009 and 2010. In 2011, 3 times of harvest, 39, 49, and 53 DAF were done at Suwon, middle part of Korea. HV plants were harvested and threshed by manually at each time. Seed yield, yield components, germination rate, hard seed rate, and viviparous germination rate were investigated. The highest seed yield represented 54 DAF in 2009, 42 DAF in 2010, and 49 DAF in 2011. When the triticale, HV support plant, comes to early lodging, the time of highest yield was delayed. 1,000-seed weight linearly increased from 35 DAF to 54 DAF. The later harvested seed showed a trend of increasing germination and hard seed ratio. However, viviparous germination had occurred because of in rainy season. In conclusion, it was presumed that an optimum harvest time for safe seed production in HV should be during 42 DAF ~ 54 DAF before the rainy season considering seed yield, 1,000-seed weight and germination.

Effect of Seeding Time and Planting Density on the its Component of Soybean Intercropped with Barley or Aftercropped (맥간후작 대두의 파종기와 재식밀도가 수량구성요소 및 수량에 미치는 영향)

  • Young-Hun Cha;Joo-Yeol Lee
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.24 no.3
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    • pp.43-50
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    • 1979
  • The effect of planting time and density of soybean on the yield component and yield when intercropped within barley rows or seeded after harvest was evaluated. Early maturing barley variety 'Olbori' was seeded at 2 levels of planting density 40 ${\times}$ 18 and 60 ${\times}$ 18 (row-hill space in em), and the soybean, variety "Dongbuktae", was seeded on June 1 as a inter-crop, June 15 and 30 as a afterharvest crop, all 2 levels of row space (40, 60 cm) and 3 levels of hill space (10, 15, 20 em). Soybean yield was increased in the following conditions: early seeding of soybeans within rows at 60 ${\times}$ 20 em density and soybean seeding after barley harvest at 40 ${\times}$ 20 em density./TEX> 20 em density.

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Resistance to Potato Virus Y Conferred by PVY Replicase Gene Sequence in Transgenic Burley Tobacco (감자바이러스 Y 복제 유전자로 형질전환된 버어리종 연초의 PVY에 대한 저항성 특성)

  • Young Ho Kim;Eun Kyung Park;Soon Yong Chae;Sang Seock Kim;Kyung-Hee Paek;Hye Sun Cho
    • Journal of the Korean Society of Tobacco Science
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    • v.20 no.1
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    • pp.50-56
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    • 1998
  • The complementary DNA (cDNA) of potato virus Y- vein necrosis strain (PVY-VN) replicase gene (Nlb) was transformed into tobacco (Nicotiana tabacum cv. Burley 21) plants. Out of 25 putative transformants regenerated, 3 were resistant to PVY-VN, one highly resistant plant with no symptom until seed harvest time and the other two with mild chlorotic spot symptoms at late stages after infection. No symptom was observed in the highly resistant plant, while mild vein necrotic symptoms were developed on suckers of the moderately resistant plants after seed harvest time, In the first generation (T1) via self fertilization, resistance to susceptibility frequency in transgenic plants from the highly resistant transformant was about 3 : 1, while it was lowered much (about 1:2 and 1:19) in T1 of the moderately resistant transformants. In the second generation (T2) of the highly resistant plant, resistance frequencies were similar to T1, but resistance levels varied greatly and appeared to be decreased. Key words : potato virus Y, viral replicate gene, transgenic tobacco plants, resistance.

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Development of a Gripper and a Cutter for the Automatic Harvest of Green Perilla Leaves (식용 들깻잎 수확 자동화 시스템의 그리퍼 및 절단 컷터 개발)

  • 송영호;장동일;방승훈;조한성
    • Journal of Biosystems Engineering
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    • v.28 no.6
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    • pp.497-504
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    • 2003
  • The objectives of this study were to develop a harvesting gripper for perilla leaves and test its performance, which was a partial work of the automated perilla leaves harvesting system development. The results of this study could be summarized as the followings: The shear forces for harvesting the perilla were measured. The measured results showed that the average shear force required was 12.13N for cutting the petioles attached to the perilla stalks, and the maximum of 17.42N. The inner diameter of air cylinder used was 6mm and the air pressure was maintained as 0.7㎫ during the tests. The time required for cutting perilla leaves could be adjusted by the control program and cutting operation could be done within 1- 10 seconds. The performance tests were conducted to harvest the perilla leaves by the gripper developed. The average success rates of cutting were 72.2% for the first test, 78.5% for the second, and 74.2% for the last. The perilla leaves were not damaged by the gripper The whole system operation could be finished within three seconds except the delay time for dropping harvested leaves.

Influence of Cultivation Condition and Harvest Time on the Storage Stability of Fresh Ginseng Individually Packaged in a Soft Film (재배조건 및 채굴시기가 연포장재 필름으로 개별포장한 수삼의 저장성에 미치는 영향)

  • 손현주;김은희;성현순
    • Journal of Ginseng Research
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    • v.25 no.2
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    • pp.94-100
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    • 2001
  • The influence of cultivation condition and harvest time on the storage stability of the fresh ginseng (50g) individually packaged in a soft film bag (ONY/LDPE/L-LDPE; 200$\times$300 mm, 90㎛) was investigated. When the fresh ginsengs were divided into four groups of direct-planted ginseng on the paddy soil(PD), transplanted ginseng on the upland(UT) and each group was stored at 25$\^{C}$ for 40 days, the quality deterioration rate was the highest in PD group while PT, UD and UT groups exhibited similar quality patterns from each other. When each group was stored at 10$\^{C}$, the quality deterioration rate was also the highest in PD group and the other three groups exhibited similar quality patterns from each other till 90 days passed after storage. However, the quality deterioration rate of UT group was 54% which was higher than UD group or PT group 180 days after storage. When the fresh ginseng harvested between September of 1997 and October of 1998 was individually packaged with the soft film and stored at 25$\^{C}$ for 12 days, the quality deterioration rate was the lowest in the group harvested in October while relatively high in the groups harvested between July and September.

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Changes in Eleutherosides Contents of Acanthopanax koreanum by Harvest Time (탐라오갈피의 수확시기에 따른 Eleutherosides 함량의 변화)

  • 좌창숙;양영택;고정삼
    • Food Science and Preservation
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    • v.7 no.4
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    • pp.362-365
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    • 2000
  • Changes in eleutherosides by havest time and part of Acanthopanax koreanum Nakai were investigated. Eleutherosides contents in stem root and leaf of Acanthopanax koreanum harvested at September were 549.2 ppm 483.2 ppm and 255.9 ppm, respectively. Eleutheroside E content in stem was 653.1 ppm, which was higher than that in root, but it was not detected in leaf. As the trees were grown eleutheroside B and eleutheroside E contents were increased gradually. Eleutheroside B content of 5 year's age tree was 567.3 ppm, which was 1.6 times higher than that of 1 year's age tree.

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Effect of Pre-wilting Time on the Change of Moisture Content and Its Silage Quality at Different Harvest Stages of Whole Crop Oat (수확시기별 예건시간에 따른 귀리의 수분함량과 사일리지 품질변화)

  • Song, Tae-Hwa;Han, Ouk-Kyu;Yun, Seong-Kun;Park, Tae-Il;Kim, Kyeong-Hoon;Kim, Kee-Jong
    • Journal of The Korean Society of Grassland and Forage Science
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    • v.30 no.2
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    • pp.135-142
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    • 2010
  • This study was carried out to establish the optimum pre-wilting time for the high-quality silage production of whole crop oat. Plants were harvested for three time at intervals of 10 days after heading (DAH) and silage production was conducted after the pre-wilting treatment of 0, 4, 8 and 32 hours, respectively. Results showed to attain a proper moisture content for profitable silage production, which was an optimal content for making silage, by pre-wilting oat for 4 hours after harvest at either 20 days after heading or harvesting 30 DAH(days after heading). As the feed value of silage, the processing of proper moisture contents showed that crude protein contents were high and the entire feed value showed higher than others. High content of lactic acid and the low content of acetic and butyric acid showed on 60~65% the moisture conditions of silage. There was desired that whole crop oat was pre-wilting on 4 hours and harvested at about 20~30 DAH and after that, even if harvesting at once, it was judged that it could produce good quality silage.

Quality Change during Harvest Time and Storage of Various Cabbages Grown on High Land by Different Transplanting Times (정식시기에 따른 고랭지 양배추의 수확 및 저장중 품질변화)

  • Eum, Hyang-Lan;Lee, Young-Hoon;Hong, Sae-Jin;Shin, Il-Sheob;Yeoung, Young-Rok
    • Journal of Bio-Environment Control
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    • v.21 no.2
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    • pp.95-101
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    • 2012
  • This study was conducted to investigate the effect of climate conditions during cultivation and harvesting on the quality and storability of fresh bulb cabbage (Brassica oleracea L. var. capitata). Plug seedlings of six cabbage cultivars were transplanted to Gangneung-Wonju University high elevation research station in Gangwon province (780 m above sea level, lat. $37.5^{\circ}N$.) and harvested with four different harvest times like August 3 ($1^{st}$), August 13 ($2^{nd}$), August 23 ($3^{rd}$), and September 10 ($4^{th}$), respectively from 50 days after transplanting. Weight loss, Hunter color factors, firmness, and soluble solids content (SSC) of the cabbage bulbs were investigated during storage at $3^{\circ}C$ (85% RH) and $25^{\circ}C$ (60% RH). Decreased bulb weight and poor quality cabbages were apparent at the late transplanting (July 14) and harvest (September 10) respectively. Quality index such as firmness and SSC at August 23 ($3^{rd}$) harvested cabbage was better than August 3 ($1^{st}$) and August 13 ($2^{nd}$) cabbages due to the good weather condition just before harvesting. The cv. 'Speed king' and 'Minix 40' showed good qualities among the cultivars, especially when the bulbs were harvested during sunny day conditions from one week before harvesting. Also SSC was influenced by weather condition before harvesting rather than transplanting date, while firmness was influenced by transplanting and harvest date. However, the differences among the cultivars were not significant. The potential of storage as maintaining the quality was different, depending on weather conditions at harvest time. Generally the storage periods of six cultivars were around 3~5 days and 9~10 days at room and low temperature, respectively. However, the August 3 ($1^{st}$) harvested cabbage lost their marketable quality very fast because of rainy and cloudy weather condition before harvesting and also storability of bulbs was 2 days and 4 days at room temperature and $3^{\circ}C$, respectively. Quality index was also not significant difference among cultivars.

The residue property of fungicide boscalid and fluidioxonil at the same time harvest leafy-vegetables (일시수확 엽채류에서 살균제 Boscalid와 Fludioxonil의 잔류특성)

  • Bae, Byung-Jin;Lee, Hae-Kuen;Son, Kyeong-Ae;Im, Geon-Jae;Kim, Jin-Bae;Kim, Tae-Hwa;Chae, Seok;Park, Jong-Woo
    • The Korean Journal of Pesticide Science
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    • v.16 no.2
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    • pp.98-108
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    • 2012
  • In order to use in the classification of minor crop for the mutual application of safe use guideline, it was investigated the residue property of fungicide boscalid and fludioxonil at the same time harvest leafy-vegetables, such as spinach, ulgaribaechu, vitaminchae and cheongkyungchae. After pesticides were applied 2 times with 1 week interval in that day of harvest, 2 days, 5 days and 7 days before harvest, vegetables were harvested, and the residue of pesticides was investigated. Base on the residue in that day of harvest, the deposit of spray solution in vegetables was calculated. The deposit of spray solution of boscalid was 253.9 mL/kg in spinach, 83.0 mL/kg in ulgaribaechu, 97.8 mL/kg in vitaminchae, and 88.3 mL/kg in cheongkyungchae, respectively. In case of fludioxonil, it was calculated 157.6 mL/kg in spinach, 67.6 mL/kg in ulgaribaechu, 64.8 mL/kg in vitaminchae, and 66.6 mL/kg in cheongkyungchae, respectively. When the amount of the deposit of both pesticides was compared in leafy-vegetables, it was the highest in the spinach. On the other hand, it was estimated the predicted dissipation curve of pesticides in leafy-vegetables during cultivation. The half-life of boscalid was 5.9 days in spinach, 7.4 days in ulgaribaechu, 4.6 days in vitaminchae, and 4.3 days in cheongkyungchae, respectively. Also, it was estimated half-life in fludioxonil, it was 3.0 days in spinach, 4.0 days in ulgaribaechu, 3.2 days in vitaminchae, and 3.5 days in cheongkyungchae, respectively. The half-life was the longest in the ulgaribaechu. When both pesticides were compared with the residue property, the deposit of spray solution and half-life of dissipation of boscalid were more than those of fludioxonil.

Effects of Winter and Summer Pruning on Yield and Fruit Quality in Southern Highbush Blueberry 'Misty' (동계 및 하계전정이 남부하이부쉬 블루베리 'Misty'의 수량과 과실품질에 미치는 영향)

  • Kang, Dong Il;Shin, Mi Hee;Kim, Hong Lim;Kim, Jin Gook
    • Journal of Bio-Environment Control
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    • v.25 no.4
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    • pp.328-333
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    • 2016
  • This study was conducted to determine the influences of winter and summer pruning on the yield and fruit quality in southern highbush blueberry (Vaccinium corymbosum L. hybrid) cv. 'Misty'. The 5-year-old southern highbush blueberry 'Misty' were used. The pruning treatments were as follows: 1) control (no pruning), 2) winter pruning (30% removed), and 3) winter pruning + summer pruning (Aug. 5). Fruits harvested for six times over the harvest season and measured yields, unmarketable fruit (defected and immature fruit), changes of each fruit weight and analyzed fruit characteristics, such as total sugar, total anthocyanin contents and total phenolic contents. The differential pruning treatments were not significant for fruit yields of southern highbush 'Misty'. No pruning treatment showed regular yields after the 2nd harvest, but the other pruning treatments were appeared that fruit yields were more concentrated on the 2nd~4th harvest time. Total sugar and total phenolic contents were observed the highest at the 4th time among the harvest period. No pruning treatment showed the highest unmarketable fruit yield at 57%, however, that of winter pruning and winter + summer pruning treatment occurred at 26%, 31%, respectively.