토마토를 저면관비 방법으로 육묘할 때 유묘 생장과 상토 무기원소 농도 변화에 적합한 추비의 종류 및 농도를 구명하기 위해 본 실험을 수행하였다. 육묘용 2종류의 동절기 혼합상토 피트모스 0-6mm(PM06)+perlite 1- 2mm(PE2)(7:3, v/v)와 피트모스 5-15mm(PM515)+PE2(7:3, v/v)를 72공 플러그 트레이에 각각 충전하고 토마토 ‘도태 랑다이아’ 종자를 파종하여 발아시킨 후 생장상에서 35 일간 육묘하였다. 자엽형성기에 추비를 시작하였고 13- 2-13, 15-0-15, 20-9-20(N-P2O5-K2O) 복합비료를 순서대로 처리하였다. 추비시 생육 단계별로 25mg·L-1의 농도 차(N 기준)를 둔 3종류의 Program을 두어 시비하였으며, 플러그 트레이의 수분이 포화 기준으로 40-50%로 감소 하였을 때 저면관비하였다. 파종 후 1, 2, 4 및 5주째 혼합상토를 상부, 중간, 하부로 3등분하여 포화추출한 후 추출용액의 pH, EC 및 무기이온 농도를 분석하고, 5주 후에 유묘생장을 조사하였다. 육묘 기간 중 상토의 pH는 PM06+PE2가 PM515+PE2 보다 높았으며, 하부와 중간이 상부보다 높은 경향이었다. EC는 PM06+PE2가 PM515+PE2보다 높았으며 평균적으로 상부가 하부보다 2배 이상 높았다. NH4-N과 K+ 농도는 2종류 혼합상토의 모든 시비 Program에서 육묘 후 5주까지 높아졌으며, PM06+PE2의 추비 프로그램 3에서 가장 높았다. NO3-N 농도는 PM06+PE2에서 육묘기간 동안 높아졌고 추비 농도가 높을수록 그러한 경향이 뚜렷하였다. 지상부 생 체중을 비롯한 유묘의 생장은 PM06+PE2의 추비 Program 2에서 가장 우수하였다. 따라서 2종류 혼합상토 를 이용한 공정육묘시 13-2-13, 15-0-15 및 20-9-20을 순서대로, 질소 기준 25mg·L-1에서 125mg·L-1까지 육묘 기에 따라 점차적으로 높여 추비하는 방법이 적합하다고 판단하였다.

This study quantitatively investigates foreign learners" acquisition of double particles in Korean. Some of the particles in Korean are jointly used with other particles and some are not, and the sequence of the particles determines the grammaticality of the double particles. Chinese and Japanese learners of Korean participated in the experiment in which they were asked to judge the grammaticality of a combination of a noun and double particles. The participants" judgment of the grammaticality of the double particles and their reaction time for the judgment were analyzed. The results of the study revealed that Japanese learners whose native language has a particle system similar to that of Korean performed better in the grammaticality judgment than Chinese learners whose native language shows no use of double particles. The advanced learners of Korean, regardless of their native languages, showed better judgment on the grammaticality of the use of double particles. This study also found that the type of double particles also affected the learners" judgment and that in the grammaticality judgment of ungrammatical joint of adverbial particles, most of the participants, regardless of their native languages and their Korean proficiency, scored much lower than in the judgment of the other types of double particles. The analyses of the participants" reaction time for the judgment showed congruent results with those of their grammaticality judgement.

This research was conducted to investigate the influence of variouis organic substrates on growth and yield of organically grown ginseng seedlings in a shaded plastic house. In the investigation of optimal substrate, the eight substrate were formulated by adjusting blending rate of peatmoss, perlite, coir dust(coco peat), and vermiculite. Then, the changes in physico chemical properties of root substrates as well as their influences on the growth characteristics and yield were determined at six months after sowing. The elevation of the blending rate of peatmoss from 50% to 70% with decrease in the rate of inorganic component (mixture of perlite and vermiculite) from 50 to 30% resulted in the increase in container capacities and decrease in total porosities and air-filled capacities. The concentrations of NH4-N, P2O5 and K increased as the incorporation rate of castor seed meal, phosphate ore, and langbenite, respectively, were elevated during the root medium formulations. The PPV-1 and PPV-4 substrates produced high stem length, stem diameter, shoot fresh weight, leaf area and root length among eight substrate. Root fresh weight was heaviest in PPV-4 compound nursery media. The results of this experiment will be utilized in the new substrate application for ginseng organic culture in shaded vinyl house.