Pengaruh Konsentrasi Nutrisi AB mix yang Berbeda Terhadap Pertumbuhan dan Produksi Dua Varietas Selada (Lactuca sativa L.) Hidroponik Sistem NFT

This study aims to determine the most appropriate concentration of AB mix nutrients for the growth and production of two lettuce varieties, as well as to obtain the effect of different concentrations on the growth and production of two varieties of hydroponic lettuce (Lactuca sativa L.) with the NFT system. This research was conducted at the Greenhouse Jl. Baturaden district. Sumbersari, Jember Regency, East Java on November 25 to January 21 2020. The research design used was a two-factor factorial Completely Randomized Design (CRD) and 7 replications. The first factor is the concentration of nutrient concentration AB mix (N) consisting of two treatment levels, N1 800 ppm and N2 1000 ppm. The second factor was lettuce variety (V) which consisted of two varieties of lettuce, green lettuce (V1) and red lettuce (V2). The data obtained were then analyzed by uij F using SPSS 20 software for windows at a level of 0.05. The results showed that the nutrient concentration of 1000 ppm AB mix gave a good response to the parameters of plant height, number of leaves, root length, fresh weight and harvest age. Green lettuce showed greater yields on the parameters of plant height, number of leaves, root weight, fresh weight and faster harvesting age. The interaction of the nutrient concentration of 1000 ppm AB mix with green lettuce gave the best response on the parameters of plant height, number of leaves, fresh weight, and age of harvest. The best treatment interaction was shown by the N2V1 treatment (1000 ppm, green lettuce) which was indicated by the parameters of the number of leaves, root weight, fresh weight and harvest age.   Keywords: AB Mix nutrition, lettuce, NFT hydroponics   Kata Kunci : Nutrisi AB Mix, selada, hidroponik NF