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이갑수(Gab-Soo Lee),이성식(Sung-Sik Lee),정재동(Jae-Dong Chung) 고려인삼학회 2003 Journal of Ginseng Research Vol.27 No.1
This experiment were conducted to select cheaper and more favorable compost among several kinds of composts which were produced by companies, farmers etc. instead of Yakto. The yield of usable ginseng seedling was also the highest in compost of Yakto, but that of usable seedling were inclined to be decreased in the compost of PL, Mushroom, Rice straw and HJ, in order. The content of inorganic salts in different kinds of composts was much different from individual organ part including leaf, stem and root. It was concluded that fully decomposed manure should be used and it<br/> needs to investigate perfect decomposed composts of PL and Mushroom instead of Yakto in order to yield ginseng seedings.
이갑수(Gab-Soo Lee),이성식(Sung-Sik Lee),정재동(Jae-Dong Chung) 고려인삼학회 2003 Journal of Ginseng Research Vol.27 No.1
This experiment were conducted to select cheaper and more favorable compost among several kinds of composts which were produced by companies, farmers etc. instead of Yakto. Yakto was similar to Standard Yakto in the content of inorganic salts, but PL and HJ composts contained more P2O5, K2O, CaO and MgO content compared with Standard Yakto and EC in Yakto was also higher than Standard Yakto did, but the phosphorus, magnesium content and EC of Mushroom compost was higher than that of Standard Yakto. On the other hands, Rice straw compost contained higher contents of phosphorus, potassium and magnesium than Yakto did. Germination rate and early growth of lettuce and C/N ratio were tested for checking decomposed degree. The compost of HJ,Mushroom and Rice straw revealed higher C/N ratio, lower germination rate and shorter shoot length thanYakto showed. It was guessed that these composts were not decomposed enough. Emergence and survival rate of ginseng seeds in Yakto were the highest, but its germination in the composts of Mushroom, PL, HJ and Rice straw, in order, was decreased, and its survival rate in the composts of PL, Mushroom, HJ and Rice straw, in order, was decreased. It was concluded that<br/> fully decomposed manure should be used and it needs to investigate perfect decomposed composts of PL andMushroom instead of Yakto.
이성식(Sung-Sik Lee),천성기(Seong-Ki Cheon),이장호(Jang-Ho Lee),안인옥(In-Ok Ahn),신성련(Seong-Lyon Shin),최광태(Kwang-Tae Choi),이갑수(Gab-Soo Lee),이형식(Hyung-Sik Lee),정재동(Jae-Dong Chung) 고려인삼학회 2004 Journal of Ginseng Research Vol.28 No.4
This experiment was conducted to determine economic application method of Yakto among 6 application method: amount of Yakto application 3 plots(70ℓ, 25.5ℓ, 13.3 ℓ/kan), and added side dressing(3ℓ/kan) each plot. The reduced Yakto application(25.5ℓ/kan) with side dressing(3ℓ/kan) showed similar root diameter, fresh weight of roots and yield of good seedlings to standard Yakto application(70ℓ/kan). And also this application method of Yakto gave similar content of Ca and Mg, but the lower content of N, P, K in roots to standard Yakto application(70ℓ/kan). These suggested that 25.5ℓ Yakto application added side dressing(3ℓ/kan) per kan might be economical application method of Yakto.
무연 (Na<sub>1</sub>,K)NbO<sub>3</sub> 계 세라믹스를 이용한 AE센서의 감도특성
류주현,이갑수,홍재일,Yoo, Ju-Hyun,Lee, Gab-Soo,Hong, Jae-Il 한국전기전자재료학회 2007 전기전자재료학회논문지 Vol.20 No.3
In this study, Acoustic emission(AE) sensors were fabricated using lead-free piezoelectric ceramics for prohibiting environmental pollution. Structure of AE sensors were designed as Langvin type air backing form. Here, the piezoelectic element was used as PZT(EC-65)(AE1) and NKN(AE2), respectively. The measured resonant frequency, the maximum sensitivity frequency and sensitivity of AE sensors were as follows ; 143 kHz, 29.4 kHz and 69.3 dB in AE1 and 179 kHz, 29.4 kHz and 66.3dB in AE2, respectively.
약토 시용방법이 인삼 양직묘 지상부 생육에 미치는 영향
이성식(Sung-Sik Lee),천성기(Seong-Ki Cheon),이태수(Tae-Su Lee),윤종혁(Jong-Hyuk Yoon),박현석(Hyeon-Suk Park),신성련(Seong-Lyon Shin),최광태(Kwang-Tae Choi),이갑수(Gab-Soo Lee),주성돈(Seong-Don Ju),정재동(Jae-Dong Chung) 고려인삼학회 2004 Journal of Ginseng Research Vol.28 No.4
This experiment was conducted to determine the economic application method of Yakto among 6 application method: amount of Yak to application 3 plot(70ℓ, 25.5ℓ,13.3ℓ/kan;180cmx90cm), and added side dressing(3ℓ/kan) each plot. The reduced amoumt ofYakto application(25.5ℓ, 13.3ℓ/kan) were lower the contents of inorganic nitrogen, P₂O_5, K, Ca and Mg, but similar pH in bed soil compared with standard Yakto application(70ℓ/kan). Side dressing applicated on 29 May increased the contents of inorganic nitrogen, P₂O_5, K, Ca, Mg and salt concentration in bed soil compared with nonside dressing in each Yakto application plot(70ℓ, 25.5ℓ, 13.3ℓ/kan). The reduced amoumt ofYakto application(25.5ℓ/kan) added side dressing(3ℓ/kan) were similar the contents of inorganic nitrogen, K, Mg and salt but lower PPs and Ca in bed soil compared with standard Yakto application(70ℓ/kan) in June. The reduced amoumt of Yak to application(25.5ℓ/kan) added side dressing(3ℓ/kan) was similar the contents of P, K, Ca and Mg but lower N in leaves compared with standard Yakto application(70ℓ/kan). The reduced amoumt of Yakto application(25.5ℓ/kan) added side dressing(3ℓ/kan) was shorter stem length, and higher 5% chlorosis of leaf tip, but similar emergence ratio, survival ratio, leaf senescence ratio, chlorophyll, stem diameter and leaf area compared with standard Yakto application(70ℓ/kan). These suggested that 25.5ℓ Yakto application added side dressing(3ℓ/kan) per kan might be possible economical application method of Yakto.