Development of controlled environment greenhouse increases organic vegetable yield

Abstract

A study of suitable greenhouses for growing organic vegetables to increase organic vegetable yields for community enterprises. The experimental site located at Ban Thung Yao Pattana Organic Agriculture Community Enterprise, Khok Muang Sub-district, Khao Chaison District, Phatthalung Province. An experimental design of a high-arch type greenhouse dimension was 4 m width, 9 m length and a height of 3.7 m and used the Internet of Things system to control water supply and air humidity. Irrigation using mini sprinklers was applied over the vegetable canopy. Increasing humidity and reducing air temperature inside the greenhouse using mist spraying installed above the vegetable tray. The results of organic vegetables (green oak lettuce, kale shiitake and Chinese cabbage) grown under the control greenhouse found that the average plant height was 20.18, 38.02, and 35.18 cm, respectively. The average canopy width was 30.31, 39.54, and 40.10 cm, respectively. The average number of leaves was 18.09, 7.06, and 14.69 leaves, respectively, and the average fresh weight per plant was 121.08, 128.51, and 198.07 g, respectively, which were higher than those grown in traditional greenhouses without environmental control systems. The average fresh weight per plant was significantly different (P<0.05). Relative humidity and soil moisture which monitor and control with mobile application were important factors in reducing time consumption for the farmer. The use of mist spraying systems and irrigation during the daytime were factors that promoted plant growth of the three organic vegetables.