Effect of Dielectric Barrier Discharge Cold Plasmaon Pea Seed Growth
2019
Traditional seed pretreatment methods
cause secondary pollution
for the application of various chemicals. This study investigated
the effect of dielectric barrier discharge (DBD) cold plasma on seedling
growth. Effects of plasma-activated tap water (PATW) and plasma-activated
seeds (PAS) were compared for germination rates, seedling height,
dry weight, and chlorophyll content. Results show that compared with
controls these growth parameters were all increased by more than 50%.
The yields and contributions of hydrogen peroxide, nitrate, nitrite,
and ammonium were quantified. Hydrogen peroxide and nitrate have an
important role in seedling growth. By etching, the seed epidermis
free radicals can reduce the apparent contact angle and increase the
water absorption of the seeds. In addition to the low cost of PATW
and PAS compared with commercial fertilizers, DBD does not involve
any chemical addition. Thus, both PATW and PAS can be an alternative
for improvement of agricultural production.
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