이 연구는 패류가 다량으로 양식되고 있는 남해안 일부해역 해수의 세균학적 위생안전성을 평가하기 위하여 조사해역 내에 영향을 줄 수 있다고 판단되는 해수 14곳을 선정하여 2014년 3월부터 10월까지 총 6차례 조사를 실시하였으며 그 결과는 다음과 같다. 해수는 수온이 평균 21.2℃, 염분농도는 32.43‰, pH는 7.92, 용존산소는 7.83 mg/L으로 조사되어 우리나라 수질환경기준으로 볼 때 1등급으로 조사되었다. 전도도는 44,600 us/cm, 탁도는 1.93 NTU로 조사되었다. 남해안 일부 조사해역 해수의 위생학적 안전성을 조사한 결과 대장균군은 평균 < 1.8~790 MPN/100 mL, 90번째값이 168.1 MPN/100 mL, 기하학적 평균이 12.8 MPN/100 mL으로 나타났고, 분변계대장균은 < 1.8~790 MPN/100 mL,90번째 값이 50.5 MPN/100 mL, 기하학적 평균값이 6.5 MPN/100 mL로 조사되어 정착성 수산물 생산해역 위생관리기준 중 청정해역의 기하학적 평균 기준치인 14 MPN/100 mL를 넘지 않아 청정해역으로 나타났다. 그러나 5월과 7월에 43 MPN/100 mL를 초과하는 시료가 35.7%와 28.6%로 KSSP 기준치인 10%를 초과하여 계절에 따라서 다소 차이가 있는 것으로 나타났다. 조사해역은 폐쇄성 내만으로 적은 오염원에도 크게 영향을 받을 수 있으므로계절에 따라서 철저한 해역의 관리가 요구되었다.

Background : This study was conducted to determine the optimal ginseng greenhouse shading material for minimizing heat injury and maximizing the yield of ginseng plants in an effort to develop a stable ginseng cultivation technology and contribute to popularizing ginseng greenhouse farming. Methods and Results : Three different types of greenhouse shading material were used: polyethylene (PE) film + black screen (95%), light scattering film + black screen (75%), and blue-white vinyl. Important experimental details were implemented in accordance with the Analysis Standard of Agricultural Test and Research set out by the Rural Development Administration. The average greenhouse temperature for the period of May through October was 20.0℃ under the PE film + black screen, 20.2℃under the light scattering film + black screen, and 19.7℃ under the blue/white vinyl. High average photosynthesis rates of ginseng plants were demonstrated by light scattering film+black screen (2.35 μmole CO2/㎡/s) and blue-white vinyl (2.38 μmole CO2/㎡/s), with the PE film + black screen showing a considerably lower photosynthesis rate (1.55 μmole CO2/㎡/s). Heat injury occurred in 0.3%, 10%, and 0.1% of the plants grown under the PE film + black screen, light scattering film + black screen, and blue-white vinyl, respectively. As for the roots, the blue-white vinyl outperformed the other shading materials in root length (25.7 ㎝), taproot length (5.9 ㎝), and the number of fine roots (23.2). The blue-hite vinyl also yielded the greatest root fresh weight (30.2 g), followed by the light scattering film + black screen (29.1 g), with the PE + black screen yielding by far inferior average weight (22.0 g). The highest crude saponin content was yielded by the light scattering film+black screen (16.61 ㎎/g), followed by blue-white vinyl (11.36 ㎎/g) and PE + black screen (11.0 ㎎/g). Conclusion : Comparing the effects of three different shading materials on greenhouse-cultivated 3-year-old ginseng plants, the blue/white vinyl outperformed two other shading materials in most of the growth characteristics, whereas the and the light scattering film + black screen yielded the highest ginsenoside content.

Background : For increasing saponin content of ginseng cultivated in shaded plastic house, this research was performed to investigate growth characteristics and saponin content of ginseng according to foliar spray of chitosan and water-soluble silicates processing. Methods and Results : The ginseng cultivars to be used this research were Cheonpung, Yeonpung and 1-year-old seedlings of Cheonpung, Yeonpung was transplanted on March 24, 2015. Planting density was 72 plant/3.3㎡and Shading material of plastic house used blue-white shading vinyl. The processing method of organic matter is as follows, we were applied chitosan (40 kg / 10a), silicate (3kg / 10a) to soil scheduled for ginseng cultivation with basal application. Then, we were diluted with chitosan and silicates to 1000-fold and investigated growth characteristics, saponin content of ginseng after foliar spray twice a month from May to September. Conclusion : Photosynthetic rate of ginseng according to treatment of organic matter was higher in the chitosan experimental group compared to the control group and photosynthetic rate of ginseng cultivars was the highest in Cheonpung’s silicate group(3.70 μmole CO2/㎡/s). The growth characteristics in above-ground part of 2-year-old ginseng was a good in the organic matter treatments compared to the control group. Above-ground part’s growth characteristics of ginseng according to treatment of organic matter showed a good trend in plant height, stem length, stem diameter of chitosan experimental group. The growth characteristics in under-ground part of 2-year-old ginseng was a good in the organic experimental groups. In Yeonpung of the chitosan experimental group, fresh root weight per plant was 9.2 g/plant that increased by 46 % compared to the control group. In Cheonpung of the silicate experimental group, fresh root weight per plant was 8.3 g/plant that increased by 56 % compared to the control group. In the chitosan experimental group, crude saponin content of under-ground part was Cheonpung(10.38 ㎎/g), Yeonpung(12.29 ㎎/g), control(11.53 ㎎/g), respectively. In the silicate experimental group, crude saponin content of under-ground part was Cheonpung(11.73 ㎎/g), Yeonpung(14.21 ㎎/g), respectively. Crude saponin content of ginseng according to treatment of organic matter was. generally higher in Yeonpung than Cheonpung.