閉鎖型苗生産システムのナスセル成型苗育成時における電気エネルギおよび水消費量

概要

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Eggplant (Solanum melongena L., cv. Senryounigou) plug transplants were grown for 17 days in a closed-type transplant production system at photosynthetic photon flux on the tray surface of 0, 100 and 350μmol m^<-2> s^<-1> on days 0-3, 4-6 and 7-16, respectively, air temperature of 30/20℃, (photoperiod/dark period) CO_2 concentration of 1000μmol mol^<-1> (photoperiod), relative humidity of 80/100% (photoperiod/dark period) and photoperiod of 16 h d^<-1>. The electric energy consumption per transplant was 0.35MJ (0.1kWh) and its cost was 1.4-1.5 Japanese Yen. The period required for transplant production was about 2 weeks shorter in the closed-type transplant production system than in the open-type transplant production system (i. e. the greenhouse). The amount of consumed water per tray area in the closed-type transplant production system would be reduced from 65.8 to 12.3 kg m^<-2> by reusing dehumidified water for irrigation. These results show that the closed-type transplant production system is feasible for commercialization.
2001-03-01