• Research Article

    Effect of the First Harvest Period on the Timing and Yield of the Second Harvest of Asparagus (Asparagus officinalis L.) under Greenhouse Conditions

    아스파라거스 비가림 재배 시 1차 수확기간이 2차 수확시기 및 수량에 미치는 영향

    Seo, H. T., Y. J. Kim, E. H. Jang and J. H. Won

    서현택, 김영진, 장은하, 원재희

    This study was carried out to investigate the effects of the first harvest period on the timing and yield of the second ... + READ MORE
    This study was carried out to investigate the effects of the first harvest period on the timing and yield of the second harvest of asparagus (Asparagus officinalis L.) under greenhouse conditions. A comparing between the first harvest and second harvest yields according to the fern growth timing suggested that the shorter the first harvest period, the more rapidly the second harvest could be undertaken after the first harvest. It was subsequently possible to begin the second harvest after the mother fern had experienced growth for 20-30 days. The first harvest yield of ‘treatment first harvested for 2 weeks’ was the lowest at 294 kg/10a, whereas the second harvest yield was the highest at 1,336 kg/10a. The first harvest yield of ‘treatment first harvested for 8 weeks’ was the highest at 795 kg/10a. - COLLAPSE
    July 2018
  • Research Article

    Effect of Light Conditions and Wet Cold Treatments on Seed Germination in Several Wild Vegetables

    광조건 및 저온습윤처리가 몇 가지 산채 종자발아에 미치는 영향

    Seo, H. T., B. K. Choi, Y. G. Moon, S. W. Kim, K. D. Park and S. B. Kwon

    서현택, 최병곤, 문윤기, 김세원, 박기덕, 권순배

    This study was conducted to investigate the impact of light conditions and wet cold treatments on the characteristics of seed germination patterns ... + READ MORE
    This study was conducted to investigate the impact of light conditions and wet cold treatments on the characteristics of seed germination patterns of several wild vegetables. The 1,000-grain weight of wild vegetables ranged from 0.08 to 14.5 g. The germination rate of 9 species grown under light conditions was relatively higher than that of those grown under dark conditions. The germination rate of 10 species subjected to seed prechilling (2°C for 50 days) was relatively higher than that of the control. The average number of days to germination for 12 species (Adenophora triphylla var. japonica (Regel.) Hara, Allium sacculiferum Maxim, Allium senescens L., Aruncus dioicus var. kamtschaticus (Maxim.) Hara, Aster scaber Thunb., Asyneuma japonicum (Miq.) Briq., Cirsium setidens (Dunn) Nakai, Crepidiastrum denticulatum (Houtt.) Pak & Kawano, Ligularia fischeri (Ledeb.) Turcz., Peucedanum japonicum Thunb., Platycodon grandiflorum (Jacq.) A.DC. and Synurus deltoides (Aiton) Nakai) subjected to seed prechilling was lower than that of the control. In particular, the value of ΔADG following wet cold treatment was the lowest at -9.5 days and was the lowest for Adenophora triphylla var. japonica at -8.2 days, Aruncus dioicus var. kamtschaticus at -7.9 days, Peucedanum japonicum at -7.9 days, Allium senescens at -7.0 days, Aster scaber at -6.2 days and Allium sacculiferum at -6.1 days. The germination coefficients (ΔCG value 9.5-21.6) of four species Ligularia fischeri, Cirsium setidens, Synurus deltoides and Adenophora triphylla var. japonica were considerably increased by the wet cold treatment. However, Allium microdictyon, Heracleum moellendorffii Hance and Aralia elata (Miq.) Seem. did not germinate in all treatments. - COLLAPSE
    July 2018
  • Research Article

    Investigations in to the Capacity and Strength of Rhizome Germination in Three Different Miscanthus Species
    Chung, Y. S., M. Park and S. Lee
    Miscanthus is a perennial rhizomatous grass. Among Miscanthus species, M. sinensis, M. sacchariflorus, and M. x giganteus and their varieties are widely ... + READ MORE
    Miscanthus is a perennial rhizomatous grass. Among Miscanthus species, M. sinensis, M. sacchariflorus, and M. x giganteus and their varieties are widely planted worldwide. However, M. x giganteus must be propagated vegetatively owing to its sterility. Therefore, its propagation poses significant challenges both economically and to production efficiency. Most M. x giganteus is propagated by rhizomes that form nodes, internodes, and buds in a similar manner to above-ground stems. Therefore, we investigated the germination rate and strength of three different Miscanthus species, M. sinensis, M. sacchariflorus, and M. x giganteus. We found that, of these species, M. sacchariflorus performed best in terms of both germination rate and strength. The results of the current study could provide the starting point for further and extensive study of rhizome germination in Miscanthus species. - COLLAPSE
    July 2018
  • Research Article

    Rhizome Germination Rate of Miscanthus x giganteus at Different Rhizome Sizes
    Chung, Y. S., M. Park and S. Lee
    Miscanthus is a perennial rhizomatous grass that originated in the tropics and subtropics, although different species are found throughout a wide climatic ... + READ MORE
    Miscanthus is a perennial rhizomatous grass that originated in the tropics and subtropics, although different species are found throughout a wide climatic range. In general, Miscanthus are grown from rhizomes under greenhouse conditions and subsequently transplanted into the field. To manage plants well, it is important to have uniform germination. However, the impact of rhizome size on the germination rate of Miscanthus species has not been thoroughly studied. The impact of rhizome size on germination rate and germination days was therefore investigated in three Miscanthus species (M. sinensis, M. sacchariflorus, and M. x giganteus). There was no considerable variation in germination days between the three Miscanthus species studied. However, the germination rate varied depending on rhizome size. Rhizome size does not affect the germination rate of M. sacchariflorus; thus, small rhizomes can be used for planting. The results of this study suggest the use of 15-20 g of rhizomes for M. giganteus and M. sinensis to ensure a 100% rate of germination. - COLLAPSE
    July 2018
  • Research Article

    Optimal Water Spray Frequency for the Efficient Utilization of a Pulsatory Direct Water Spray Gun System for Peach Cultivation

    맥동형 직분사 분무건 시스템의 효율적인 사용을 위한 최적 분무 횟수 설정

    Park, Y. S., N. Y. Um, S. H. Lim, S. M. Park and J. Y. Heo

    박영식, 엄남용, 임상현, 박성민, 허재윤

    This study was conducted to select the optimal water spray number for the efficient utilization of a pulsatory direct water spray gun ... + READ MORE
    This study was conducted to select the optimal water spray number for the efficient utilization of a pulsatory direct water spray gun system. In order to accomplish the purpose of this research, we evaluated the impingement forces, according to different power pressures, distances, and water spray numbers per second, using a novel pulsatory direct water spray gun system. Based on the result of the basic test, the power pressure and distance of spray that can expect excellent performance were selected as 2 MPa and 1 m, respectively. Then, the flower and leaf bud thinning rate were investigated with different water spray numbers per second under four different flower developmental stages. The optimal water spray frequency for the use of the pulsatory direct water spray gun system was nine sprays per second at the flowering stage, because it resulted in 80% of the flower thinning rate and less than 8% of the leaf bud thinning rate. These results will be used for field applications, which could contribute to labor savings in peach cultivation. - COLLAPSE
    July 2018
  • Research Article

    Monitoring Thrips (Thripidae: Thysanoptera) using Sticky Traps in Asparagus Greenhouses in Gangwon, Korea

    강원도 아스파라거스 포장에서 끈끈이 트랩을 이용한 총채벌레 모니터링

    Jeon, S. J. and S. K. Kim

    전신재, 김삼규

    Thrips are among the most important insect pest on many agricultural crops, including asparagus. In this study, we monitored thrips in asparagus ... + READ MORE
    Thrips are among the most important insect pest on many agricultural crops, including asparagus. In this study, we monitored thrips in asparagus greenhouses in Yanggu, Gangwon Province using different colored sticky traps from 2016 to 2017. In total, four species of thrips on asparagus were found: Frankliniella occidentalis, F. intonsa, Thrips tabaci, and T. palmi. Among them, the onion thrips, T. tabaci, was the most abundant thrips throughout the year. In total, 1,286 and 1,236 individuals of thrips were caught on 166 yellow and blue sticky traps, and 4,412 and 2,541 were caught on 228 yellow and blue sticky traps in 2016 and 2017, respectively. The number of thrips attracted to sticky traps was significantly different between the yellow and blue sticky traps in 2017, but was not in 2016. The highest numbers of thrips were recorded at the end of May and mid-June in 2016, but this shifted to mid-July in 2017. This result indicated that the onion thrips population was greatly affected by many variables, such as temperature, pesticide application, and harvest time. - COLLAPSE
    July 2018
  • Research Article

    A Review of Heat Transfer Modelling for Food Thermal Processing

    열전달 모델의 식품의 가열살균공정에 대한 응용

    Park, H. W., W. B. Yoon and S. H. Song

    박현우, 윤원병, 송상훈

    Computer simulation (CS) is a powerful tool to model transport phenomena, including fluid flows motions corresponding for the momentum, mass and energy ... + READ MORE
    Computer simulation (CS) is a powerful tool to model transport phenomena, including fluid flows motions corresponding for the momentum, mass and energy transfer. CS has been widely used to simulate the temperature distribution during thermal processing of foods. In this paper, the background of thermal processing of food and the fundamentals of developing CS models are discussed. It also provides an overview of the current CS modeling studies of thermal processing in solid, liquid and liquid-solid mixtures. It is expected that the incredible fast growth in the use of CS in the food and bioprocessing industry will encourage engineers to develop CS models with high computational powder for designing industry-scale thermal processing systems and understanding the combined effect of thermal and non-thermal processing. - COLLAPSE
    July 2018
Journal Informaiton Agriculture and Life Sciences Research Institute Journal of Agricultural, Life and Environmental Sciences
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