J. Sci. Agri. Technol. (2022) Vol. 3 (1): 16-24
DOI: https://doi.org/10.14456/jsat.2022.4
Abstract
The purpose of the study was to evaluate the effect of using water with micro-nano bubbles (MNBs) and different electrical conductivity (EC) on the growth and yield of green oak lettuce in hydroponic systems. The green oak lettuce plantation was studied from December 2020 to February 2021 at the Agricultural Technology Research Institute, Rajamangala University of Technology Lanna, Thailand. The experimental design was a 2×3 factorial in CRD. Factors were: 1) giving MNBs water at 0 or 5 minutes weekly and 2) giving of EC (Electrical conductivity) at 0.3, 0.6, and 1.2 mS cm-1 in a deep flow technique (DFT) hydroponics system. The results showed that MNB treated water for 5 minutes affected the fresh and dry weight of the leaves and the total weight of green oak lettuce, and the different levels of EC had significant effects on the growth and yield of green oak lettuce. The interaction between MNBs and EC affected plant height, canopy width, leaf greenness values (SPAD), fresh leaf yield, shoot, and the total weight of green oak lettuce had significant differences. Moreover, concentrations of N, P, K, Ca, and Mg in the leaf increased with increasing EC. Those MNBs treatment increased N, P, K, and Ca but did not affect Mg.
Keywords: electrical conductivity, micro-nano bubbles, hydroponic, green oak lettuce
Received: September 6, 2021. Revised: October 12, 2021. Accepted: December 7, 2021.
