Open AccessEffects of Supplemental Cations on Growth and Nitrogen Accumulation in Canna indica L.
Author(s) -
Manutsawan Manokieng,
Arunothai Jampeetong
Publication year - 2021
Publication title -
chiang mai university journal
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.173
H-Index - 10
ISSN - 1685-1994
DOI - 10.12982/cmujns.2021.075
Subject(s) - nitrogen , potassium , nutrient , chemistry , nitrate , canna , biomass (ecology) , horticulture , plant growth , hoagland solution , botany , zoology , agronomy , biology , food science , organic chemistry , starch
The effects of supplemental cations on growth, nitrogen, and mineral accumulation were assessed in Canna indica L. Similar sized 45 days-old plants were grown on a nutrient solution modified from Hoagland and Arnon (1950). The different cations were added to generate 6 treatments (n=4): (i) control (no cation added), (ii) 2.5 mM K+, (iii) 2.5 mM Ca2+, (iv) 75 mM Na+, (v) 1.25 mM K+ + 1.25 mM Ca2+ and (vi) 2.5 mM Ca2+ + 75 mM Na+, respectively. An experiment was carried out in the greenhouse for 49 days. The study found that supplemental K+ and K++ Ca2+ increased plant growth and total biomass. The highest SER was found in plants receiving supplemental K+. In contrast, SERs, leaf areas, and total biomass decreased in Na+ or Na++Ca2+ supplemented plants. The accumulated NO3- concentration (at the whole plant level) was also highest in the plants with supplemental K+ and K++Ca2+. The total nitrogen accumulation was higher in the K+, Ca2+, and K++Ca2+ supplemented plants than in the control plants. The results suggest that supplemental cations particularly K+ can enhance plant growth and nitrogen accumulation in C. indica. Therefore, cation supplementation could be an alternative technique to stimulate plant growth and improve nitrate removal in constructed wetlands.Keywords: Constructed wetland, Nitrate removal, Potassium, Tropical wetland plants