Abstract:
Chloride (Cl2
-
) plays an essential role in the photosynthesis process. Electric shock
to the ground is intended to maximize the local potential of the soil through electrical
stimulation so that all local potentials such as organic matter, microorganisms, and nutrients
absorbed in soil colloids can be optimized. This study aimed to find out the effect of electric
shock on the media and Cl2
-
treatment on the nutritional and bioactive content of lettuce. The
research was conducted at the greenhouse, consisting of 2 factors analyzed using Factorial
Random Block Design. The first factor was the electric shock interval consisting of four levels
(0, 3, 5, and 7 days interval application). The second factor was the concentration level of
CaCl2 consisting of three levels (0%, 1%, and 2%). All the treatment combinations were
replicated three times, and each treatment consisted of 3 samples. The observed variables
included leaf water content, vitamin C content, crude fiber (%) and ash content (%), total
soluble solids (ºbrix). The results showed that total soluble solids are not affected by electric
shock and spraying of CaCl2. Electrical shock of 5 days interval and the application of 1% of
CaCl2 (I2C1) can increase the vitamin C content. Electric shock of 5 days interval and the
application of 2% CaCl2 fertilizer (I2C2) can increase the leaf water content. Electric shock of
7 days interval with the combination of 2% CaCl2 (I3C2) was able to increase the ash content
and crude fiber of lettuce.
