A Design of The Hydroponic Greenhouse with Automatic Environment Control System

Abstract

This research aims to design and build a hydroponics vegetable greenhouse with an automatic environment control system and to test the environmental control system to find suitable conditions for growing vegetables. In this research, a comparative of experiment of growing experimental plants (Green cos vegetables) is designed in an automated system and outside conventional systems with adding liquid fertilizer. Then the electrical conductivity is measured in the solution which are pH, temperature, and humidity within the appropriate range. The experiment test in 45 days with 7-14 days seeding period in trays and then transferred to hydroponics in troughs. The results showed that the experimental cultivation in greenhouses had EC, pH, temperature, and humidity at 1.3-1.4 mS/cm, 5.5-7.0, 28 - 33 ºC and 60-80 %RH, respectively. The stem has growth rate at 0.1767 and the leaf germination rate was 0.6566. the planting outside the greenhouse has growth rate at 0.0899 and the leaf germination rate at 0.4691. Then, compared with the experimental results, it was found that, plants grown in greenhouses had better stem growth rates of 96% and leaf germination rates of 28.88%.