도시 녹화를 위한 녹화기법에 있어 Parabolic 함수에 의한 Centaurea cyanus L. 종자의 발아 주요온도 분석

Analysis Cardinal Temperatures of Centaurea cyanus L. Seed by Parabolic Function for Greening City in Greenery Cover Method

Among landscaping techniques, seed spray refers involves spraying a mix of seeds, fertilizers and other ingredients, and it is primarily used when landscaping large areas. The requisite time for sprayed seeds to form a landscape differs depending on temperature conditions however the correlation between plant growth and temperature is not given consideration. This research aims to setup the appropriate temperature and requisite time for cornflower seeds germination, in order to utilize them efficiently. The study was conducted at the National Institute of Horticultural and Herbal Science between March and April 2013. Centaurea cyanus L. was the test material selected for this research, and subjects received thermal treatment using a growth chamber. The test method involved four repetitions of placing 100 seeds in petri dishes and filter paper, and supplying 10ml of distilled water for seven different levels of processing temperatures. Processing temperatures were set at 5,10,15,20,25,30℃. During the experiment, the light source was maintained at 4~4.5μmoles/m₂/s. For indoor experiments, the germination rate was measured every two days after placing the test subjects in the petri dish. Plotting the correlation between temperature and time to germination using a parabolic function, at a 50% germination rate, revealed a minimum temperature of 0℃, optimal temperature of 12.3℃, and maximum temperature of 24.5℃. Moreover, the time it took to reach a 50% germination rate was 6.6 days at the optimal temperature.