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KMID : 0903619870280020099
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Journal of the Korean Society for Horticultural Science
1987 Volume.28 No. 2 p.99 ~ p.111
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Effects of Modifying the Light Environment Using Blue Color Removing (BCR) Film on the Seedlings Growth and Yield of cucumber (Cucumis sativus L.) under Structure
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Abstract
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This experiment was conducted to investigate the effects of photoselective polyethylene(PE) film of blue color removing(BCR) which is made by removing the spectral region below about 500nm (blue light region) on the seedlings growth, low temperature tolerance and fruit yield of cucumber (Cucumis sativus L.) and to examine the feasibility in protected horticulture. The effect of BCR film was compared to polyethylene(PE) film covered. The results obtained were as follows;
1. BCR film which is partially deficient in blue color region 500nm was revealed the light stability in transmission spectra checked after six months covering under natural light.
2. No differences in temperature as affected by both P.E. film and BCR film covering observed but showed the less light intensity of 10 Klux in the plots of BCR film covering. Both plots with strawmat during experiment occurred the temperature below 12℃ which is critical temperature for growth of cucumber.
3. Seedlings growth was more favored in the plots of BCR film covering regardless of covering with and without strawmat. Especially, marked increment in plant height, number of leaves and leaf area was obtained in the plots of BCR film covering.
4. Changes in total dry weight of cucumber seedlings as influenced by the modification of light environment using BCR film were greatly differed. The plots of BCR film covering with strawmat increased 10 to 60% compared to the plots of P.E. film covering with strawmat but in the plots of BCR film covering with strawmat total dry weight increased significantly than that of P.E. film covering. The degree of contribution to the total dry weight of leaf, stem and root dry weight in seedling stage was higher in the leaf dry weight both covering materials with strawmat and the plots of BCR film covering without strawmat but in the plots of without strawmat stem dry weight was contributed highly.
5. The amount of electrolyte leakage as affected by both covering materials revealed the differences so that BCR film covering was reduced the electrolyte leakage at the 4℃ or 2℃. Critical temperature for cell leakage in cucumber showed at 6℃.
6. Fruit yield increased markedly in the plots of BCR film covering regardless of with and without strawmat. In the P.E. film coverivg house with strawmat the increasing rates of fruit yield in the plots of BCR film covering with strawmat showed 19% compared to the plots of P.E. film covering with strawmat but in the case of the plots without strawmat yield reduction observed 24% in the plots of P.E. film covering and 9io in the plots of BCR film covering. In the BCR film covering house with strawmat fruit yield increased 14% in the plots of P.E. film covering and 47% in the plots of BCR film covering. Compared to the yield in the plots of P.E. film covering with strawmat in the P.E. film covering house the plots without strawmat increasing rates of yield showed 4% in the plots of P.E. film coversing and 26% in the plots of BCR film covering. Consequently, feasibility of BCR film covering in protected horticulture was promising material as a covering material. However, further trials for utilization of BCR film should be followed.
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