Effect of Addition of Led Lighting Duration and Planting Media on Growth and Results of Lettuce Plants (Lactuca Sativa L.)

Agricultural land in urban areas is increasingly narrow as a result of building and infrastructure development, causing conventional crop cultivation to change to the concept of urban farming. Lettuce (Lactuca sativa L.) is one of the commodities suitable for urban farming because basically lettuce is a leaf vegetable plant that has high economic value and has good benefits. Lettuce growth is influenced by several factors including planting media, length of irradiation, type of light, humidity and aeration. Based on this, research related to the length of irradiation and planting media is important to do. This research is expected to provide information in determining the length of irradiation and the right planting media to increase the growth and yield of lettuce (Lactuca sativa L.) through urban farming methods. This research took place at Wonorejo Seedling Farm, Surabaya, East Java. This research was conducted in a closed room with simulated porch light. Research results for 45 days after planting showed that there was no interaction between the addition of irradiation duration and planting media on all observation variables except root length. Plants that received additional LED light did not show a real effect but were better than plants that did not receive additional length of LED light irradiation.