Abstract
The aim of the study was to evaluate the effect of
pre-sowing seed stimulation of Thuringian Mallow (Lavatera
thuringiaca L.) with He-Ne laser light of different exposure times
on the crop yield as well as on energetic parameters such as calorific
value and combustion heat. Seeds were subjected to laser
light with an exposition time of 0, 1, 5, 10, 15 and 30 minutes.
Measurements were carried out independently on mature plants
from the first and second vegetation year. The results varied
between the samples, which indicated possible impact of laser
radiation on the resultant weight and calorific value of various
experimental combinations. For plants from the second vegetation
year the statistical differences in calorific value, combustion
heat and crop mass were found between samples characterized by
different exposition times: between sample irradiated for 30 min
(L30) and 1 min (L1) as well as between sample L30 and sample
irradiated for 5 minutes (L5). For plants after the first vegetation
year the statistically significant differences in calorific value and
combustion heat were found for sample with exposition time of
15 minutes (L15) and control sample, for sample L15 and sample
L5 as well as between samples L15 and L30. For all the samples
from the second vegetation year the increase in combustion heat
and calorific values were detected as compared to control. Thus,
after the application of certain parameters of laser radiation to the
processing of seeds, the plant can be more useful for energetic
purposes through more efficient crop.
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