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이종남,김광배 ( Jong Nam Lee,Kwang Bea Kim ) 한국주조공학회 1982 한국주조공학회지 Vol.2 No.1
N/A In order to investigate the relationship between the thermal characteristics of the various molds as green sand mold, dry sand mold, CO₂ mold and shell mold, and the solidification characteristics of molten metal, the thermal analysis of rarious molds and melt were performed. The structure of Al-Castings was a/so observed. Results obtained in this experiment were as follows : 1) The heating rate of the molds was increased in the order of green sand mold, CO₂ mold, dry sand mold and shell mold, On the other hand the solidification time of the melts was shortened in the order of dry sand mold castings, CO₂mold castings, green sand mold castings and shell mold castings. 2) The arrest temperature period in the heating curve of the green sand mold was resulted from the eraporation of moisture contained in mold, which was tranafered to the outer side of the mold. 3) The temperature fluctuation of the melt in the shell mold was considered to be resulted from the combution heat of resin contained in the mold. 4) The amounts of heat absorption of the molds were increased in the order of dry sand mold, CO₂mold, green sand mold and shell mold. 5) The higher the solidification rate was, the longer was its shrinkage pipe and the finer its grain size.
육묘 기간중의 고도 차이가 자묘의 특성 및 딸기 수량에 미치는 영향
이종남(Jong Nam Lee),임주성(Ju Sung Lim),이준구(Jun Gu Lee),남춘우(Chun Woo Nam),김기덕(Ki Deog Kim),이응호(Eung Ho Lee),용영록(Young Rog Yeoung) 한국원예학회 2010 원예과학기술지 Vol.28 No.4
The nursery plant quality and flower bud induction of new strawberry cultivars, ‘Maehyang’ and ‘Seolhyang’ in forcing culture were evaluated in the highland and lowland region. In order to produce daughter plants, the new cultivars were grown in the open field located at both highland (Daekwallyung, above 800 m sea level) and lowland (Gangneung, above 20 m sea level) region, respectively. The average air temperature at highland during nursery plant propagation period was 5.3℃ lower than those at lowland. The number of daughter plants produced at lowland was 2 times as high as those of highland, presumably due to the higher air temperature. Anthracnose incidence rates of runner plants produced at lowland were 4 to 7% as high as those in highland. Mean temperature in the highland (23.5℃) during flower bud differentiation treatment was 5.1℃ lower than that in the lowland (28.6℃). Seedlings produced in highland showed higher C/N ratio and lower T/R ratio compared to those produced in lowland. The average flower bud formation date of the daughter plants grown in highland were advanced by 30 days compared to the date in lowland. Accordingly, highland was supposed to be appropriate region for raising seedlings in forcing culture of the new strawberry cultivars of ‘Maehyang’ and ‘Seolhyang’.
사계성 딸기의 고랭지 재배 시 지상부 조절에 따른 생육 및 수량
이종남(Jong Nam Lee),이응호(Eung Ho Lee),이준구(Jun Gu Lee),김수정(Su Jeong Kim),박한영(Han Young Pak),용영록(Yeoung Rok Yong) 한국원예학회 2006 원예과학기술지 Vol.24 No.1
This study was conducted to evaluate the growth and yield reaction of ever-bearing strawberry (Fragaria × ananassa Duch.) taking the thinning of reproductive organs like crown and cluster for summer season production at cool region. The cultivar ‘Pechika’ was planted on 28 May, and the split-plot experimental was designed by putting the crown numbers by 1, 2, 3 and noninterference as the control. To compare the fruit set to non fruit thinning, fruits were removed to remain the number of 5, 8, and 11, respectively. At the same time the number of leaves were adjusted to 4 and 6 as the main plot at the first fruiting period as the sub-plot. There was no significant difference in the number of fruits per flower clusters, but the fresh weight of them increased when the number of crown was increased. Harvest breaking period was short with increasing the crown numbers and decreasing the fruit numbers per flower cluster. Marketable fruits per plant were increased with increasing the crowns and the fruits per flower cluster. The marketable fruit was the highest as 74~80% of total production with the treatment of five fruits per flower cluster. The marketable yield was 26.5 tonㆍ㏊?¹ that the strawberry was treated as 3 crowns with 11 fruits per flower cluster and it was 23% higher than that of control plot with non-thinning flower cluster. The strawberry grew with the best condition and was shortened the period of first fruiting when the 7~9 leaves were kept at the first fruiting stage. Marketable yield of the above strawberry was 20.7 tonㆍ㏊?¹ and the amount 40% higher than other leaf treatments.