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Effects of Greenhouse Orientation on the Greenhouse Environment and the Growth of Tomato in Forcing Culture  

Choi, Young-Hah (Namhae Sub-Station, National Institute of Horticultural & Herbal Science, RDA)
Park, Kyoung-Sub (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science, RDA)
Kang, Nam-Jun (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science, RDA)
Kim, Hong-Lim (Namhae Sub-Station, National Institute of Horticultural & Herbal Science, RDA)
Kwak, Yong-Bum (Namhae Sub-Station, National Institute of Horticultural & Herbal Science, RDA)
Kim, Heung-Deug (Namhae Sub-Station, National Institute of Horticultural & Herbal Science, RDA)
Goo, Dae-Hoe (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science, RDA)
Cho, Myoung-Hwan (Protected Horticulture Research Station, National Institute of Horticultural & Herbal Science, RDA)
Publication Information
Journal of Bio-Environment Control / v.19, no.1, 2010 , pp. 6-11 More about this Journal
Abstract
This experiment was conducted to investigate the effect of greenhouse orientation on the greenhouse environment and the growth and yield of tomato cv 'Momotaro-Yoku' in forcing culture. The photosynthetic phpton flux density (PPFD) of a.m was higher in north-south orientation than that in east-west orientation and it was opposed in the p.m. Mean PPFD of a day was higher in east-west orientation than that in north-south orientation because the light transmitting area became larger in east-west orientation with decrease of incidence angle. The PPFD at 60 cm point above ground of all furrows was poor due to shadows near plants and it was higher in north-south orientation than that in east-west orientation. The air temperature in the greenhouse was higher in east-west orientation than that in north-south orientation but there was no significant difference since mid February as solar altitude goes up. The soil temperature was some higher in east-west orientation than that in north-south orientation and there was not significant difference among ridges. In east-west orientation, as ripening was promoted, high early yield of tomato were obtained. So total yield was greater about 8% in east-west orientation than that in north-south orientation. Therefore, it was considered that east-west orientation is more advantageous than north-south orientation for forcing culture of tomato.
Keywords
furrow; harvesting date; PPFD; ridge; shade;
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