The Effect of Eco-Friendly Deicing Agents Containing Humic Acid on Plant Growth

Abstract

Objectives:In this experiment, we used an environmentally friendly snow removal agent containing calcium chloride (CaCl2) and humic acid (HA) to alleviate salt stress on chili pepper seedlings, and analyzed its effect on plant growth. As an alternative to minimize the negative effects of existing chloride-based snow removal agents on plants and soil, we investigated whether humic acids contribute to improving plant physiological responses and soil electrical conductivity (EC). Evaluated.Methods:For 21 days, we set up a control group (Count.), a calcium chloride treatment group (CaCl2), a humic acid treatment group (HA), and a mixed treatment group (HUA2, HUA5, HUA10) in which humic acid and calcium chloride were mixed. The growth of stems and roots was measured. In addition, the high mortality rate of leaves and changes in soil electrical conductivity (EC) were measured to evaluate the effect of alleviating salt stress.Results and Discussion:As a result of the experiment, stem length increased in the control group, humic acid treatment group (HA), and humic acid and calcium chloride mixed treatment groups (HUA2, HUA5, HUA10), and the greatest growth was observed in HUA5 among the mixed treatment groups. On the other hand, in the calcium chloride treatment group (CaCl2), stem growth did not occur and the high leaf mortality rate was 66.7%, which had a negative effect on growth. The soil EC value was lowest at 0.21mS/cm in the humic acid only treatment group (HA) and highest at 1.25mS/cm in the calcium chloride treatment group (CaCl2). In the mixed treatment group, the EC value tended to decrease as the humic acid concentration increased. This indicates that humic acid can play a role in reducing salt stress and promoting plant growth.