Germination and Seedling Growth Response of Sprouts and Leafy Vegetables after Applying Oxygen Nanobubble Water

Abstract

Background and objective: The nanobubbles remain stable in water, and it increased dissolved oxygen (DO) in the water that promotes the seed germination and the plant growth. We evaluated the seed germination and growth of sprouts (radish, wheat, and barley) and leafy vegetables (red mustard and pak choi) when irrigated with various DO of nanobubble water (NB).Methods: The oxygen NB was generated by surface friction and treated in 4 levels: NB 0% (control, DO 9.21 mg·L-1), NB 20% (DO 15.40 mg·L-1), NB 33% (DO 20.93 mg·L-1), and NB 100% (DO 39.29 mg·L-1).Results: The root length of radish and wheat increased more in NB 33% than the control plot. The fresh weight increased in NB 33% compared to the control plot in radish and wheat, and both fresh and dry weight increased more in NB 20%, NB 33%, and NB 100% than the control plot of barley. The leaf length and width of red mustard decreased more in NB 33% and NB 100% than the control plot and NB 20%, which indicated the leaf compactness. The fresh and dry weight of shoot and root increased more in NB 100% than the control plot in red mustard. In pak choi, the shoot fresh weight increased more in NB 100% than the control plot. In leafy vegetables, the germination rate of red mustard in NB 100% was higher than the control plot, however, it was not significantly different between oxygen NB plots in sprout vegetables.Conclusion: The results showed that the root growth and biomass increased after applying NB 33% in sprout vegetables. The leaf growth properties as the number of leaves and leaf size were not significantly different or decreased in NB treatments compared to control plots, but NB 100% (DO 39.29 mg·L-1) effectively increased the root growth and plant biomass in leafy vegetables.

Nanobubble and Ozone Nanobubble Treatments Increase the Vase Life of Cut Cymbidium ‘Spring Pearl’

“…The concentration of hydrogen NBs on the cut carnation flower was effective in a specific range (Li et al, 2021). In radish and wheat treated with various concentrations of oxygen NB (including NB 20%, 33%, and 100%), only treatment with NB 33% increased the RFW (Lee et al, 2021). The 1% hydrogen-rich water (HRW) increased the vase life of the cut rose 'Movie Star' because it had more beneficial bacteria than other treatments, including distilled water (control), and 0.5%, 25%, and 50% HRW (Fang et al, 2021).…”

“…Increasing DO is required in agriculture to purify water and promote plant and root growth (Noh et al, 2022). The root length of radish (Raphanus sativus L.) and wheat (Triticum aestivum) increased in plants treated with oxygen NBs (21.0 mg•L -1 DO) compared to the control (9.2 mg•L -1 DO) (Lee et al, 2021). The number of leaves in tomato (Solanum lycopersicum) increased by 8.7 leaves when exposed to oxygen NBs compared to 5.9 leaves of tap water (TW) treatment (Ahmed et al, 2018).…”

Safe Farming: Ultrafine Bubble Water Reduces Insect Infestation and Improves Melon Yield and Quality

“…It has been widely used in crop production [ 2 , 3 ]. It has been reported that plants irrigated with UFW have increased seed germination [ 4 , 5 , 6 ], show significantly enhanced rooting and adventitious root development [ 7 ], and enhanced root nutrient uptake and increased nutrient use efficiency [ 8 ]. Many reports have shown UFW irrigation increased crops yield and quality, such as in rice [ 9 ], lettuce [ 10 ], tomatoes [ 11 , 12 ], cucumbers [ 13 ], muskmelon [ 14 ], and strawberries [ 15 ].…”