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KMID : 0903620000410030301
Journal of the Korean Society for Horticultural Science
2000 Volume.41 No. 3 p.301 ~ p.304
Growth and Flowering of Flower Crops as Affected by Temperature Dropping Methods Used in the Experimental Plastic House for Summer Culture




Abstract
This study was conducted to investigate the growth and flowering of flower crops as affected by temperature dropping method used in the experimental plastic house for summer. The growth of Rosa hybrida was the greatest in water streaming over roof (T3) as water streaming over roof allowed light transmission at a higher rate. The flowering of Rosa was hastened in fog and fon (T2), T3, and water sprinkler over roof (T4) in which light transmission rate was high, whereas it was delayed by two days in shading over and under roof (T1) and water sprinkler with white shading net over roof (T5) in which light transmission rate was low. There was no significant difference among all treatments in dry weight of Lilium elegans. However, the root growth of Lilium was lower in T1 and T5 than in other treatment. Root growth and bulb size was the smallest in T5. Root growth of Lilium as a low temperature plant was affected by air temperature and relative humidity. The flowering of Lilium was the fastest in TS and forced by two days than T1. These results indicate that shading materials with very low light transmission rates delayed flowering. There was no significant difference among all treatments in growth of Cymbidium hybrids. There was no significant difference among all treatments in the plant height and width of Coleus blumei. However, the shoot and root growth of Coleus was the greatest in T2. Therefore, the growth of sun plants will be good under the condition of decreased temperature but with an adequate light transmission rate, while the growth of shade plants will be consider the condition of low light intensity as light transmission rate was low.
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