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http://dx.doi.org/10.12791/KSBEC.2016.25.4.249

Effects of white Wash Coating Agent on the Growth of Strawberry Seedlings in Plastic Greenhouses  

Lee, Jae Han (Protected Horticulture Research Institute, NIHHS, RDA)
Kwon, Joon Kook (Protected Horticulture Research Institute, NIHHS, RDA)
Ham, Young Jae (NOROO Paint and Coatings Co., Ltd.)
Yun, Moo Ryong (NOROO Paint and Coatings Co., Ltd.)
Park, Kyoung Sub (Protected Horticulture Research Institute, NIHHS, RDA)
Choi, Hyo Gil (Department of Horticultural Science, Kongju National University)
Yeo, Kyung Hwan (Protected Horticulture Research Institute, NIHHS, RDA)
Lee, Jung Sup (Protected Horticulture Research Institute, NIHHS, RDA)
Khoshimkhujaev, Bekhzod (Protected Horticulture Research Institute, NIHHS, RDA)
Publication Information
Journal of Bio-Environment Control / v.25, no.4, 2016 , pp. 249-254 More about this Journal
Abstract
This study was carried out to evaluate the efficiency of white shading agent for reduction of greenhouse air temperature and to develop cost-effective cooling strategies for strawberry seedling production during hot seasons. Experiment results showed that solar radiation ($W/m^2$) was reduced by 14~17% and 33~37% for 15% and 35% white wash shading treatments, respectively, in black shading net treatment solar radiation was reduced by 39~44% compared to non-shaded treatment. Measured greenhouse air temperatures in 15% and 35% white wash shading treatments were $38.4^{\circ}C$ and $36.5^{\circ}C$, respectively, whereas in black shading net covered greenhouses air temperature was $35.1^{\circ}C$, thereby 35% and 15% shading treatments showed 3.3 and $1.9^{\circ}C$ higher air temperatures than black net shading treatment. Crown diameter of strawberry plants in black net shading treatment was 7.5mm, and in 15% and 35% white wash shading treatments were 8.6mm and 8.3mm, respectively. Strawberry transplants grown in 35% white wash shading treatment produced the highest above ground fresh weight(7.8g), followed by 15% white wash shading(6.7g) and black net shading treatments(5.8g). Also, both 15% and 35% white wash shading treatments produced higher root fresh weight(4.1g and 4.3g) compare to black net shading treatments(2.7g).
Keywords
coating agent; solar radiation; strawberry; transmittance; transplants;
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