Abstract:
The motivation for the study was the need to obtain data on the
effect of humic acids isolated from brown coal on soil fertility and plant
development. In our study, we conducted experiments with plants to isolate
humic substances from brown coal and study its physicochemical properties
and the effect of the resulting fraction on the growth of Phoenix dactylifera
date palm plants in laboratory conditions. The isolated humic acids had a
density of 1.0416 g/cm3
and the dynamic viscosity was 1.84*10-3 Pa*s. The
mass fraction of humic substances was 56%. As a result, when watering date
palm plants with a 1% solution of humic substances, plant height increased
by 41.5 in 1 month, leaf width by 80, and leaf length by 15%, compared with
the control variant. The results of physicochemical experiments prove that
humic substances from brown coal promote the level of plant nutrition.
