TITLE:
Effects of Fermented Nori (Pyropia yezoensis) Seaweed Liquid Fertilizers on Growth Characteristics, Nutrient Uptake, and Iodine Content of Komatsuna (Brassica rapa L.) Cultivated in Soil
AUTHORS:
Seinn Moh Moh, Kyi Moe, Yasumasa Obo, Shiniti Obo, Aung Zaw Htwe, Takeo Yamakawa
KEYWORDS:
Nori, Komatsuna, Basal and Foliar Application, Plant Growth, Nutrient Uptake, I Content
JOURNAL NAME:
American Journal of Plant Sciences,
Vol.9 No.11,
October
23,
2018
ABSTRACT: We
investigated the effects of fermented nori (Pyropia yezoensis) liquid fertilizers on plant growth, soil plant
analysis development (SPAD) values, and nutrient uptake of komatsuna (Brassica rapa L. var. wakana komatsuna) plants. The four types of
fermented nori seaweed liquid fertilizers (SLFs) evaluated in this study were
prepared by anaerobic fermentation of unwashed nori (SLF1), aerobic
fermentation of unwashed nori (SLF2), anaerobic fermentation of washed nori
(SLF3), and aerobic fermentation of washed nori (SLF4). In Experiment 1, the
highest plant growth, SPAD, and nutrient uptake values were obtained from
treatment with SLF2 and SLF4. There were no significant differences between the
effects of basal and foliar application of SLFs, except for iodine (I) content;
plants treated with SLF1 had the highest I content. In Experiment 2, plant
growth and nutrient uptake decreased with higher concentrations of SLFs. Plants
treated with 25% SLF2 + 75% chemical fertilizer (CF) or 25% SLF4 + 75% CF
exhibited significantly higher plant growth and nutrient uptake. The highest I
content resulted from treatment with 75% SLF1 + 25% CF or 100% SLF1. Taken
together, our results showed that 25% SLF + 75% CF produced the best plant
growth characteristics, nutrient uptake, and I content relative to the
controls. Therefore, basal application of these liquid organic fertilizers can
be used to increase productivity, nutrient uptake, and I content and to reduce
nitrate-nitrogen content in komatsuna production.