PENGARUH KONSENTRASI NUTRISI DAN LAMA ALIRAN NUTRISI TERHADAP PERTUMBUHAN TANAMAN SELADA MERAH(Lactuca sativa var.crispa) DENGAN SISTEM HIDROPONIK NFT(Nutrient Film Ttechnique) BERBASIS MIKROKONTROLER

Red lettuce (Lactuca sativa var. crispa) which is cultivated using hydroponics with NFT system. Determination of the use of microcontroller-based NFT hydroponics in this study so that the cultivation of red lettuce vegetables (Lactuca sativa var. crispa) has a higher quality and quantity of production and maintained cleanliness, koefficiency in the use of fertilizers and the utilization of electrical energy as effectively in the long flow of water and its maintenance easier. This study aims to find a good concentration of red lettuce nutrients (Lactuca sativa var. crispa) in growth and to know the length oftime the water flow is good for hydroponic vegetables. This research was conducted in integrated laboratory of Muhammadiyah University of Malang which will be conducted in June – November 2020. The cultivation of red lettuce is done using the medium of seedlings rockwoll at the Green House located in the Integrated Laboratory of UMM. The observational changes in this study consisted of plant height, number of leaves, wet weight, dry weight, root length, stem diameter. The design used in this study is a factorial RAK experiment design. This design consists of 2 factors, namely factor K (nutrient concentration) consists of 5 levels and T (length of water flow) consists of 3 levels. Each treatment factor is repeated 2 times. The results showed that the treatment of various concentrations of nutrients and the length of water flow did not show an influence on the growth process of red lettuce plants. The old treatment of the flow indicates that there is no influence on the growth of red lettuce. Treatment of nutrient concentration 0 indicates that the growth and development of lettuce plants is stable