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http://dx.doi.org/10.12791/KSBEC.2016.25.4.334

Effects of Modified Installation Methods of Roof Ventilation Devices in the Single-span Plastic Greenhouses on Yield and Fruit Quality of Oriental Melon  

Yeo, Kyung-Hwan (Protected Horticulture Research Institute, National Institute of Horticultural and Herbal Sciences, RDA)
Yu, In-Ho (Protected Horticulture Research Institute, National Institute of Horticultural and Herbal Sciences, RDA)
Choi, Gyeong Lee (Protected Horticulture Research Institute, National Institute of Horticultural and Herbal Sciences, RDA)
Lee, Seong-Chan (Protected Horticulture Research Institute, National Institute of Horticultural and Herbal Sciences, RDA)
Lee, Jae-Han (Protected Horticulture Research Institute, National Institute of Horticultural and Herbal Sciences, RDA)
Park, Kyoungs Sub (Protected Horticulture Research Institute, National Institute of Horticultural and Herbal Sciences, RDA)
Lee, Jung-Sup (Protected Horticulture Research Institute, National Institute of Horticultural and Herbal Sciences, RDA)
Bekhzod, Khoshimkhujaev (Protected Horticulture Research Institute, National Institute of Horticultural and Herbal Sciences, RDA)
Publication Information
Journal of Bio-Environment Control / v.25, no.4, 2016 , pp. 334-342 More about this Journal
Abstract
In order to evaluate the modified installation methods of roof ventilation devices, derived from the previous experiment ('investigation into the optimum capacity of roof ventilation devices and their deployment'), the conventional and modified (improved) roof ventilation systems were installed in the single-span plastic greenhouse for growing oriental melons. The roof vents ($60{\varphi}$) and roof fans (maximum air capacity of $38m^3/min$) were installed in the spacing of 15m (FT, modified 'side vent+roof fan' ventilation) and 6m (TT, modified 'side vent+roof vent' ventilation) respectively on the roof of greenhouses for the modified roof ventilation treatments, and 20m (FC, conventional 'side vent+roof fan' ventilation) and 8m (TC, conventional 'side vent+roof vent' ventilation) for the conventional ones. The stem diameter, leaf blade lengh, petiole length, and leaf width were lower in the FT and TT treatments than those in the conventional treatments, FC and TC. Although the fruit weight and total yields were slightly lower in the FT and TT treatments, the marketable fruit ratio (%) were higher, as a result of increased fruiting ratio (%) in these treatments, than those of FC and TC. The marketable yields (kg/10a) in the FT and TT treatments were 8,391 kg/10a and 7,283 kg/10a, which were respectively 661 kg/10a and 487 kg/10a higher than those in the treatments of FC and TC. The modified installation methods of roof fan resulted in production of more female flowers and lower fruit drop ratio (%) compared to conventional meathods. In the treatment of the conventional ventilation with roof vent, the fruit weight, fruit length & width, and flesh thickness were higher than in other treatments, but there were no significant differences in the fruit width and flesh thickness among the treatments.
Keywords
marketable yield; roof fan; roof vent; side vent; ventilation system;
Citations & Related Records
Times Cited By KSCI : 4  (Citation Analysis)
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