農業用閉鎖型施設の多目的利用を目的とした多段式育苗装置の簡易ユニット化

抄録

This study developed a multistage transplant culture system that was constructed easily by connecting light and smaller culture units vertically. Its environmental characteristics were then investigated. The culture unit comprises a plastic container box (L : 570× W : 380×H : 340 mm), a light panel with fluorescent lamps, and an ebb-and-flow watering system. Outside air was introduced to the culture space through ventilation windows placed on the sides of the culture space; it was then sent to a space on the light panel with fans installed in the light panel. Finally, the air exhausted from the culture system through ventilation windows placed in the light panel upper side. Air temperature in the culture space was higher than the outside air by about 1.0°C, and a horizontal temperature difference in the culture space was about 1.0°C, when the two florescent lamps (110 W in total) were illuminated. Culture solution was supplied by a pump to the culture system top stage from a water solution tank under culture units. The culture solution was siphoned when the liquid level of the top stage reached the drainpipe height; then, the water solution was supplied to the second stage. Repeating such supply and drainage, the water solution was finally supplied to the whole unit.