Received: 27-02-2024 / Accepted: 12-04-2024
Lettuce is high nutritional plant. Research was conducted to find the optimal LED light intensity for indoor hydroponic green oakleaf lettuce cultivation, contributing to ensuring the supply of safe vegetables for consumers and optimizing power consumption. The experiment was arranged in a randomized complete block design (RCBD) with three replicates. Evaluatingthe effects of four different light intensities (90-130-160-190µmol.m-2s-1 (under a combination of red, blue and green LEDs, spectral ratio: R660/B450/G550= 57/17/26) on growth, physiology and yield of hydroponic cultivated green oakleaf lettuce indoor was performed. The results showed plant height, leaf number, photosynthetic pigment content, leaf area, leaf thickness, root parameters, Brix and yield increased as light intensity increased. Among the lighting treatments, 190 µmol.m-2s-1 treatment had the best effect on the growth and yield of green oakleaf lettuce.