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정영숙(Chong Young-Sook),김숙종(Kim Sook-Jong),민현숙(Min Hyun-Sook) 충북대학교 생활과학연구소 1998 생활과학연구논총 Vol.1 No.-
The purpose of this study was to explore the parental behaviors and social demographic factors influencing the parental behaviors in rural areas. The data collected from 647 children who were in 4-6th elementary school in rural areas at Chungbuk province. The results of this study were as follows; 1. The level of Warmth-Acceptant attitude of parents was comparatively high(father 3.10, mother 3.15 respectively). 2. There were significant differences in Warmth-Acceptant attitude of father according to the family form, religion, parents education, and housing type. There were significant differences in Rejection-Restrict attitude of father according to child gender and father education. 3. There were significant differences in Warmth-Acceptant attitude of mother according to family form, religion, and parents education. There were significant differences in Rejection-Restrict of mother according to child gender and family form. There was significant difference in Permissiveness- Noninterventional attitude of mother according to child gender. 4. There were positive or negative relationships between the mother's and father's parental behaviors.
인공광 식물공장내 광질 제어가 방풍나물 생장에 미치는 영향
허정욱 ( Jeong Wook Heo ),김동억 ( Dong Eok Kim ),한길수 ( Kil Su Han ),김숙종 ( Sook Jong Kim ) 한국환경농학회 2013 한국환경농학회지 Vol.32 No.3
BACKGROUND: Plant factory system of an artificial light type using Light-Emitting Diodes (LEDs), fluorescent light, or metal halide lamp instead of sun light is an ultimated method for plant production without any pesticides regardless of seasonal changes. The plant factory is also completely isolated from outside environmental conditions such as a light, temperature, or humidity compared to conventional greenhouse. Light-environment control such as a quality or quantity in the plant factory system is essential for improving the growth and development of plant species. However, there was little report that the effects of various light qualities provided by LEDs on Ledebouriella seseloides growth under the plant factory system. METHODS AND RESULTS: Ledebouriella seseloides seedlings transplanted at urethane sponge were grown in the plant factory system of a horizontal type with LED artificial lights for 90 days. Yamazaki solution for hydroponic culture of the seedlings was regularly irrigated by the deep flow technique (DFT) system on the culture gutters. Electrical Conductivity (EC) and pH of the solution was recorded at 1.4 ds/m and 5.8 in average, respectively during the experimental period. Number of unfolded leaves, leaf length, shoot fresh and dry weight of the seedlings were three times measured in every 30 days after beginning of the experiment. Blue LEDs, red LEDs, and fluorescent lights inside the plant factory were used as light sources. Conventional fluorescent lamps were considered as a control. In all the treatment, light intensity was maintained at 100 μmol/㎡/s on the culture bed. Fresh weight of the seedlings was 3.7 times greater in the treatment with the mixture radiation of fluorescent light and blue+red LEDs (1:3 in energy ratio; Treatment FLBR13) than in fluorescent light treatment (Treatment FL). In FLBR13 treatment, dry weight per seedling was two times greater than in FL or BR11 treatment of blue+red LEDs (1:3 in energy ratio; Treatment BR11) during the culture period. Increasing in number of unfolded leaves was also significantly affected by the FLBR13 treatment comparing with BR11 treatment. CONCLUSION(S): Hydroponic culture of Ledebouriella seseloides seedlings was successfully achieved in the plant factory system with mixture lights of blue, red LEDs and fluorescent lights. Shoot growth of the seedlings was significantly promoted by the FLBR13 with the mixture radiation of fluorescent light, blue, and red LEDs under 1:3 mixture ratio of blue and red LEDs during the experimental period compared to conventional light conditions.