양파 채종재배시 차광망 설치, 하우스 천창개폐,환기 조건이 채종량에 미치는 영향

Influence of Shading Treatment, Open and Closure of Roofing, and Ventilation Condition to Seed Production in Onion (Allium cepa)

The purpose of this research was to investigate the influence of shade net and ventilation on the yield production of onion seed in greenhouse. Two onion cultivars, ‘6701’ and ‘6704’, was used for this experiment, and grown in several greenhouses with different type of shade net percentages (0, 35, and 55%) and with or without ventilation. ‘6701’ and ‘6704’ with parameter temperature showed a negative correlation coefficient around 10 o’clock, it was verified little or low correlation as the time progresses. ‘6701’ seed production has been analyzed in a difference humidity condition of the seed production showed high correlation around 14 o’clock. ‘6701’ and ‘6704’ seed production has been analyzed correlation with light intensity, seed production almost showed a negative correlation coefficient. Controlling relative humidity in the greenhouse are important factor to produce onion seed yielding under shading screen and ventilation condition.