• 화훼연구
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• 제17권3호
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• pp.185-189
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• 2009

2년생 안개초의 안정적인 월하(越夏)를 위해 1차 절화 수확 후 차광여부 및 잔존 지상부 절단 높이에 따른 고사주율, 개화 및 절화특성을 조사하였다. 차광처리에서 신초 발생소요일수가 짧고 발생 신초수도 많았고 고사주율은 낮은 경향이었으며, 특히 지상부를 높게 절단함으로서 고사주율이 낮아졌다. 개화는 무차광에서, 그리고 지상부를 높게 절단한 처리에서 빨라지는 경향이었고, 화경장, 측지수, 경경, 화수폭 및 절화량 등은 무차광, 9 cm 절단처리에서 가장 우수하였다. 비원추화서율과 로젯트 발생률도 무차광 9 cm 절단처리에서 낮았다.

• 한국산림과학회지
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• 제105권1호
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• pp.78-85
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• 2016

본 연구는 수요가 증가되고 있는 산채인 갯기름나물을 대상으로 임간재배지 내 차광과 부엽토가 갯기름나물의 생장 및 광합성 특성에 미치는 영향을 조사하여 보다 고품질의 갯기름나물을 생산하는 것뿐만 아니라 생산량 증대 및 친환경 재배기술 개발에 이바지하고자 하였다. 실험은 전광 및 35%, 50%, 75% 차광으로 총 4차광처리와 부엽토처리(대조구, 침엽부엽토, 활엽부엽토)를 하였다. 초장, 줄기직경, 근원직경, 줄기수, 건중량은 전광 내 활엽부엽토에서 가장 높았으며, 엽면적, 엽장, 엽폭은 35% 차광 내 활엽부엽토에서 가장 높았다. 광합성, 기공전도도, 증산율, 수분이용효율은 전광 내 활엽부엽토에서 가장 높았다. 특히, 광합성률은 모든 차광에서 활엽부엽토가 높게 조사되었으며, 차광률이 높아질수록 낮아지는 경향을 보였다. 따라서 갯기름나물을 친환경적으로 재배하기 위해서는 임간재배에서 35% 차광(상대광도 51.1%) 후 활엽부엽토를 이용하는 것이 가장 좋은 생장을 보여 생산량 증대와 고품질 갯기름나물의 생산에 가장 효과적일 것으로 판단된다.

• 한국태양에너지학회 논문집
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• 제28권2호
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• pp.50-57
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• 2008

This study intends to evaluate the effect on indoor environment(annual thermal load, sunshine)by the application of the movable horizontal shading device on summer and winter season. For these purpose, we supposed the models which are composed of the several horizontal shading devices. Then we analyzed the simulation using the IES5.5.1 and Seoul weather data. The results of this study are as follows: 1) The proper length, angle of horizontal shading device is 2.1m, 28 degree, respectively. 2) The decreasing rate of the annual load of the Movable Horizontal Shading Model(MHSM) in comparison with the No Shading Model(NSM) & Conventional Horizontal Shading Model(CHSM) is 31.11%, 6.63% respectively. 3) The decrease of sunshine of the MHSM on summer season is effective the alleviation of visual displeasure. On the other hand, the increase of sunshine of the MHSM on winter season is effective the psychological comfort. Further study is to be required the sensitivity analysis on the various shading length for the realistic proper shading length.

• 한국태양에너지학회 논문집
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• 제34권3호
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• pp.12-20
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• 2014

There is no comprehensive consensus of the control patterns people op::rate shadings or the motivating factors that influence their decisions. Patterns of shading devices use can affect the energy consumption of buildings. Therefore, this study aims to analyze shading device usage patterns based on the physical factors that can affect occupants behavior. First, control patterns of indoor shading devices in apartment buildings were monitored by taking pictures. Next, frequency of shading device use together with their shading portions was analyzed based on two physical factors such as window orientation and floor level. The results showed that about 35% of the monitored apartment buildings utilized indoor shading devices. Also, the south-facing apartments were more dynamically used than their east-facing counterparts. On the contrary, there was no general trend in regards to the shading operation patterns.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.120-120
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• 2022

Agrivoltaic System (AVS) was introduced with the concept that it could generate electricity by using the extra light remain after crops use for photosynthesis in farm, which can earn additional income. However, crop yield was declined under the AVS condition due to the decrease in light energy. In the past, many researchers have been studied about crop states under shading conditions. However, the phenomenon of partial shading such as under the AVS is not well studied. In this study, to figure out the response of crop under the different light conditions, the electron transport rate (ETR) and non-photochemical quenching (NPQ) of rice was investigated using the chlorophyll fluorescence measurement. Also, physiological changes of crops under the shading conditions were investigated. The growth experiment under partial shading under AVS and overall shading which made of 35% shade cloth was conducted to understand the eco-physiological responses of rice to light in terms of the photosynthesis. Under the shading conditions, SPAD value and chlorophyll contents were higher, but the leaf thickness was lower than control. The overall shading condition show lower ETR than others during the growing season. In contrast, NPQ was higher than other treatments. This means the available light energy cannot contribute to photosynthesis under the shading condition.

• 한국식품저장유통학회지
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• 제8권4호
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• pp.362-366
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• 2001

양파를 간이저장 할 때 발생하는 부패 및 변색구에 의한 상품성 저하를 감소시킬 목적으로 무차광. 55% 차광 및 95%차광을 처리하여 시험한 결과는 다음과 같다. 1. 평균온도는 무차광에 비해 15%차광에서 1.0~2.9$^{\circ}C$가 낮았고, 95%차광에서는 2.0~3.8$^{\circ}C$가 낮았으며, 상대 습도는 차광정도가 높을수록 약간 높았다. 2. 처리별 조도 및 색도는 차광정도가 높을수록 낮았고, 저장 21일 후 변색구 발생율은 무차광 90.0%애 비해 55%차광 35.7%, 95%차광 13.3%로 차광처리에서 훨씬 적었다. 3. 부패율은 무차광 28.9%에 비해 95%차광 26.5%, 55% 차광 25.4%로 차광처리에서 적었고, 중량감모도 차광처리에서 적었다.

• 한국환경복원기술학회지
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• 제10권1호
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• pp.16-22
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• 2007

This study was carried out to investigate the effects of shading conditions for appropriate light level for several floricultural plants native to Korea. The results under the different shading levels of 0, 30, 50, 60% and full sun light are as follows; Growth of Miscanthus sinensis and Pennisetum alopecuroides, which are heliophyte plants, were better under 30% shading condition than full sunlight. Higher shading levels was poor than control. Growth of Sedum spectable was decreased when light intensity was decreased. As shading level increased, growth reduction rate in Sedum spectable were higher than that of other species. Growth and ornamental value of Arisaema amurense, which is sciophyte plants, were increased under 50% shading.

• KIEAE Journal
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• 제15권1호
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• pp.83-88
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• 2015

This study aims to develope the light-weight PV blinds with windows and to investigate the shading analysis by the control conditions. For the study, the polycarbonate characteristics and coating methods are analyzed and the PV blind design for a small office is suggested. Also, the mock-up model of a suggesting system was made. The field tests were controled based on a solar altitude under clear sky conditions. As results, it is necessary to use a polycarbonate instead of a tempered glass for a light-weight PV. The shading effects of blind systems are high in slat angle $30^{\circ}$ and low in $0^{\circ}$. Also, the shading ratio is more affected by solar latitude than solar altitude. The shading change rate is relevantly constant on the solar altitude.

• 아시안잔디학회지
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• 제7권1호
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• pp.5-12
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• 1993

This experiment was conducted to study on the morphological change and growth retardation of Korean Lawograss (Zoysia japonica Steud.) under various shading degrees. Dada of plant height, No. of tiller, No. of stolon, No. of rhizome and fresh weight were measured on the l47days after transplanting in 1991. The results are summarized as follows. Plant height was increased at 30% shading degree or over, Maximum plant height was observed at 60% shadeing degree which was 24.2 cm. while full sunlight(control) was most shorted as 10.1 cm. Plant height rapidly was increased as to shading degree increase. The decreasing rate was lower in tiller number and stolon number(top parts of plant) compared with the rhizome number(under ground part) was severely decreased at 30% to 60% of shading. To increase the shading degree, rhizome number was most severely decreased under shading degrees. As degree of shading increase to 30%, 60% and 90%, fresh weight decrease to 66%, 44%, 22% to full sunlight, respectively. Relative growth retadation of Korean lawngrass was decreased by the order of number of rhizome, fresh weight, number of tiller, number of stolon. And these characters were highly significant accord-ing to the different shading degrees.

• 한국약용작물학회지
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• 제25권6호
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• pp.397-403
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• 2017

Background: This study was aimed at evaluating the growth, yield, and carbohydrate content in the whole Allium hookeri plant with shading treatment in hot summer. Methods and Results: Different shading rate, including 0 (control), 35 or 55%, was employed from the June $21^{st}$ to August $31^{st}$. Daily average air and soil temperature, which were approximately $2.5^{\circ}C$ and $3.8^{\circ}C$ lower, respectively, were observed with both 35% and 55% treatments in July and August, with no significant difference in daily maximum air temperature. Dry weights were high, approximately 40% and 48% for the shoot and 20% and 12% for the root, with the 35% and 55% treatments, respectively, 8 weeks after shading. Division number was increased by 13% and 19.8% with the 35% and 55% treatments, respectively. The mortality rates of 150 plants were 9.1%, 4.0%, and 1.3% with the 0 (control), 35% and 55% treatments, respectively. At 4 weeks after shading, the highest and lowest sucrose levels in both shoot and root were observed with the 35% and 55% treatments, respectively. At 8 weeks after shading, there was no significant difference in the sucrose content in the shoot among the treatments. Conclusions: The highest plant growth rate and yield with the 55% treatment may be related with the decrease in both air and soil temperatures, resulting in reducted leaf respiration and thus compensate net photosynthesis.