• Journal of Bio-Environment Control
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• v.10 no.2
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• pp.80-87
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• 2001

This study was conducted to provide basic data for the design of shading facility of greenhouse. The proper distance between external shading screen and roof surface, transmissivity of shading materials, and shading effects of external and internal shadings were analyzed. About a distance of 10 cm between inclined external shading screen and roof surface was enough to guarantee the external shading effect in the greenhouse without roof vent. The inside temperature of greenhouse installed with 85% internal shading screen was lower the maximum of 4$^{\circ}C$ and mean of 2$^{\circ}C$ than that with 55% internal shading screen in both natural ventilation and no ventilation condition. The difference of soil temperature between shading and no shading greenhouse was great, but the difference by shading rate or shading method was small. The performance of external shading for controlling inside temperature down was superior to that of the internal shading. The externally inclined shading screen parallel to the roof surface of greenhouse was more effective than the externally horizontal shading screen in controlling inside temperature of greenhouse without roof vent.

• Proceedings of the Korean Society for Bio-Environment Control Conference
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• 2001.04b
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• pp.27-28
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• 2001

온실의 차광설계에 필요한 기초자료를 제시하기 위하여 온실모형과 실험온실을 이용하여 외부차광재의 적정 설치간격 분석, 차광재별 광투과율 분석, 차광율에 따른 온실내부온도의 변화 분석, 차광이 온실내부의 지온변화에 미치는 영향분석 및 외부차광과 내부차광의 차광효과 비교를 실시하였다. 외부경사차광시 온실 지붕과 차광재의 설치간격은 10-30cm에서 차광효율이 가장 좋은 것으로 나타났으나 환기창의 개폐를 위한 공간이 필요하지 않는 온실에서는 10cm 정도이면 충분한 간격이 될 것으로 판단된. (중략)

• KOREAN JOURNAL OF CROP SCIENCE
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• v.32 no.1
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• pp.10-15
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• 1987

The experiment was designed to determine the proper shading rate and shading materials to decrease the excessive dried leaves during cure of burley tobacco. Five shading rates and seaven shading materials were applied on the pipe vinyl house from initial stage or yellow stage of cure. Temperature was lower and weight-loss of leaves delayed with shading from initial stage to browning stage of cure. Excessive dried leave were largely decreased as shading rate was increased to 70%. However, at shading rate more than 70%, its decreasing extent was fewer. Price per kg and physical properties improved considerably at shading rate of 50%. Shading materials alone could not completely prevent excessive dried leaves but it could decrease them. Orange, white and purple color vinyl among shading materials had so effects of shading as the black shading cloth during curing. However, white color vinyl didn't endure more than a few months due to sunshine. A difference of light quality in visible light was no significance on air curing.

• Asian Journal of Turfgrass Science
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• v.15 no.2
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• pp.51-64
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• 2001

Summer stress is one of the serious problems on cool-season grass at the soccer fields in Korea during heavy rainy season. This study was conducted to intestigate the effect of shade net with regard to its percent (0, 50, 75), color (black, green), height (0 cm, 30 cm) and time (7 hr, 24 hr) on turf canopy temperature, light intensity, leaf color, turf performance, clipping yield and root dry weight of cool-season turfgrass. Turf canopy temperature was 6~13$^{\circ}C$ under black and green shade net when temperature was over 4$0^{\circ}C$. Light intensity was also decreased from 40 to 94% under black and green shade net compared to control. Black shade net was more effective than green net in reduction of temperature and light intensity. Green shade net was found to be better for photosynthesis of cool-season grass. Leaf color, turf performance, clipping yield, and root dry weight were better and increased under 50% and 75% shade net. 50% black shade net with 30cm height and 7 hr treatment showed the best turf performance. It can be concluded that 50% and 75% green shade net can be used fur reducing summer stress on cool-season grass after soccer marches during heavy rain season. The shade net decreased the turf canopy temperature and reduced heating damage of cool-season turfgrass.

• Current Research on Agriculture and Life Sciences
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• v.17
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• pp.71-77
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• 1999

The study aimed to identify effect of shading rate and duration on the growth and flowering of Lilium species in faring culture. Plant height of 'Gelria' and 'Casablanca' increased by higher shading at early growth stage, whereas that of 'Jolanda' and 'Dream Land' decreased. Also, plant height of 3 cultivars except 'Gelria' were longer by higher shading at whole growth stage, that of 'Gelria' was shorter as compared to in untreated plants. In cultivar 'Gelria', blasting increased and days to flowering shorted in higher shading only except 100% shading treatment at early growth stage. In 100% shading treatment, Blasting of 'Jolanda' was occurred 15.7% and the number of flower buds of 'Dream Land' and 'Casablanca' were reduced. Flower buds of 'Gelria' were not induceded in continued shading condition regardless of shading degree, the number of flower buds and flower size of 'Jolanda' and 'Dream Land' was reduced by 75% and 50% shading, respectively and in 'Casablanca', days to flowering was longer by shading at whole growth stage. Growth of daughter bulbs in 'Gelria', 'Jolanda' and 'Dream Land' was not influenced by shading at early growth stage but those of 'Casablanca' was inactive. Whereas that of 4 cultivars were inactive in continused shading condition.

• Korean Journal of Medicinal Crop Science
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• v.15 no.4
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• pp.291-295
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• 2007

This study was conducted to investigate the optimum shading material of rain shelter in Panax ginseng C.A. Meyer. Results obtained from our experiment can be summarized as follows. From photosynthetically active radiation (PAR) as shade materials on sunny day, temperature under rain shelter was low in comparison with that under polyethylene net. It was ranged from 3 to $5^{\circ}C$ Survival rate of 3,4, and 5 year-old ginsengs under shade materials of rain shelter was lower than that under polyethylene net. Root fresh weight in ginseng grown under rain shelter was increased into about 5.0g in 3 year-old, 10g in 4 year-old and 8g in 5 year-old ginsengs. From investigating root grade of 3, 4, and 5 year-old ginsengs, we confirmed that rain shelter was more effective than the other as shading materials. Root size of 3, 4, 5 year-old ginsengs grown under rain shelter is distributed in bigger size than that grown under polyethylene net. Also, in the case of saponin contents, the ginseng grown under the shade material of rain shelter was higher than that under polyethylene net.

• Food Science and Preservation
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• v.8 no.4
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• pp.362-366
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• 2001

This study was conducted to reduce degradation of marketability by the rot and discolor of onion bulbs under room temperature from 1977 to 1998. Allium cepa cv. Changnyungdeago, late strain, was used for the test at the storage condition of non-shading, 55% and 95% shadings. The results obtained are as follows: The mean temperature was maintained lowly 1.0∼2.9$\^{C}$ in 55% and 2.0∼3.8$\^{C}$ in 95% shadings in contrast to nun-shading, but the relative humidity was a tittle higher in high shading than other shading condition. The illumination and color density maintained lowly in high shading. After 21 days of storage, the rate of discolored onion bulbs was significantly higher in non-shading(90.0%) than 55%(35.7%) and 95%(13.3%) shadings. The rotting rate by the end of August was a little decreased at 55%(25.4%) and 95% shadings(26.5%) in contrast to non-shading(28.9%), and total weight loss was maintained lowly in high shading.

• Korean Journal of Environmental Agriculture
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• v.21 no.1
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• pp.24-30
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• 2002

Ginseng (Panax ginseng C. A. Meyer) has been cultivated on raised beds with shading condition for 4 to 6 years because of its physiological characteristics. This shading condition maintains relatively stable soil environments protecting from rainfall and direct sunlight. Therefore, pesticides in ginseng growing soil are exposed to far different environment from the general cropping field. To study the behavior of pesticides under this condition, the effect of covering on the persistency of Procymidone in ginseng cultivating soil was investigated by using several shade materials. The most important factor affecting Procymidone persistency in soil under covering was water leakage rates of shade materials.

• Horticultural Science & Technology
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• v.33 no.2
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• pp.227-232
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• 2015

This experiment was carried out to investigate the effects of shading materials (aluminum specific-shading screen and polypropylene non-woven fabric) and shading ratio (50% and 70%) on climatic changes, cut-flower quality, and yield of spray rose cultivars for export during high temperature periods. The daily cumulative solar radiations were higher with the aluminum specific-shading screen, especially with 50% shading compared to polypropylene non-woven fabric. Air temperature and root zone temperature within rockwool media greatly decreased with the aluminum specific-shading screen, but relative air humidity was not different among shading methods. Chlorophyll contents (SPAD values) were slightly higher with aluminum-specific shading screen than with polypropylene non-woven fabric, and were higher with 50% than with 70% aluminum specific-shading screen. Except for 'Lovely Lydia', marketable and exportable yields of all cultivars were higher with 50% than with 70% aluminum shading treatment. In addition, flowers talk length, stem diameter, number of node and 7ea-leaflet, and floret number tended to be better with aluminum specific-shading screen. Flower stalk length was higher with 70% than with 50% aluminum shading treatment. Chromaticity of petals slightly increased, and vase life was 0.5-2.5 days longer for each cultivar with aluminum specific-shading screen than with polypropylene non-woven fabric.

• Proceedings of the Plant Resources Society of Korea Conference
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• 2018.10a
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• pp.82-82
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• 2018

산채는 주로 산지에서 자생하는 것을 채취하거나 자생지와 비슷한 환경의 임간에서 재배하여 수확을 한다. 본 시험은 차광처리를 통해 산지가 아닌 노지에서 산채 재배 가능성을 검토하고자 하였다. 대상작목은 개미취(Aster tataricus), 눈개승마(Aruncus dioicus var. kamtschaticus), 단풍취(Ainsliaea acerifolia), 박쥐나물(Parasenecio auricudatus var. matsumurana), 산마늘(Allium microdictyon), 어수리(Heracleum moellendorffii), 우산나물(Syneilesis palmata)이다. 시험작목을 전북 남원시 허브시험장(표고 500m) 포장에서 2017년 4월에 종묘를 정식하여 약 2년간 재배하였다. 고온기인 5월부터 9월까지 35%, 55%, 75%, 95% 차광정도를 달리하여 설치 한 후 시설 내의 기온, 상대습도 등 환경조건 및 재배작물의 고사율, 출현율, 생육특성 등을 조사하였다. 시설 내부의 평균 기온은 차광정도가 높아질수록 다소 낮아졌으며, 상대습도는 점차 높아졌다. 차광정도별 고사율을 조사한 결과 개미취, 어수리, 우산나물의 경우는 차광비율에 상관없이 각각 3.6%, 5.7%, 9.8%로 낮게 나타났다. 반면 단풍취와 산마늘의 경우 차광 비율에 따른 편차가 크지는 않았지만 최대 고사율이 각각 20.0%, 36.8%로 다소 높게 나타났다. 또한 눈개승마 75% 차광에서 50.0%, 박쥐나물 35% 차광에서 100% 고사율을 보여 적정 차광비율 선정 필요하다고 판단된다. 정식 2년차 4월 평균 출현율은 개미취 100%, 눈개승마 86.2%, 단풍취 84.3%, 박쥐나물 77.9%, 산마늘 97.5%, 어수리 88.9%, 우산나물 96.3%이었다. 다만 단풍취, 박쥐나물은 차광정도가 높아질수록 출현율이 높아졌고, 어수리는 차광정도가 높아질수록 다소 출현율이 낮아졌다. 또한 생육특성 조사 결과 초장은 단풍취를 제외하고 차광처리별 경향성이 뚜렷하게 나타나지 않았으며, 엽장과 엽폭은 산마늘을 제외한 작목들은 차광이 강할수록 커지는 경향이었다. SPAD 값은 개미취와 산마늘은 처리구역별 차이가 없었으나, 나머지 작물은 차광이 높아질수록 SPAD 값도 커졌다. 시험결과 표고 500m지역에서 개미취, 산마늘, 어수리, 우산나물은 차광수준에 따른 생육의 차이가 크지 않거나 차광이 낮아도 생육이 비교적 양호하였다. 그러나 단풍취와 박쥐나물은 차광정도에 따라 생육의 차이가 분명하였으며, 차광이 높아질수록 생육이 좋아졌다. 이를 바탕으로 산채류 노지재배를 위해서는 연차 간 작목별 생육특성, 수량성, 상품율, 경제적 분석 등의 추가적인 조사가 이루어져 할 것으로 여겨진다.