Temporal and spatial dimension of dissolved oxygen saturation with fluidic oscillator and Mazzei air injector in soil-less irrigation systems

Liu, Hongjun; Bhattarai, Surya P.; Balsys, R.J.; Midmore, David J.; Holmes, Thomas; Zimmerman, William B.

doi:10.1007/s00271-016-0512-x

Cited by 20 publications

(17 citation statements)

References 32 publications

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“…However, in some other published studies, oxygenation of nutrient solution has resulted in improved yield compared with plants grown in hypoxic to anoxic conditions, in addition to reduced root necrosis (Marf a et al, 2005), increased leaf area and root mass (Holtman et al, 2005), increased macronutrient uptake (Marf a et al, 2005), and increased shelf life in cucumber (Ehret et al, 2010) and pepper (Ehret et al, 2010;Marf a et al, 2005). For example, Lei et al (2016) found that corn yield increased by oxygenation of irrigation water for plants grown in a completely water-logged vermiculite substrate under warm water temperature (averaging 27.7°C), where DO in the ambient irrigation water at times decreased to 1 mg • L -1 in the substrate. These completely saturated conditions differed from plant growth in peat-perlite substrate with moisture levels at or below CC in our studies.…”

Section: Discussionmentioning

confidence: 99%

“…Oxygen injecting technology can increase DO above oxygen-saturated levels in irrigation water (Schr€ oder and Lieth, 2002;Zheng et al, 2007). Lei et al (2016) grew corn in vermiculite substrate under completely saturated conditions. Irrigating plants with oxygenated water (two aeration systems) increased the DO from 3.5 to 6.5 mg • L -1 , resulting in higher corn yield and biomass compared with those grown with ambient irrigation water with 0.3-4.5 mg • L -1 DO.…”

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confidence: 99%

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Oxygenation of Irrigation Water during Propagation and Container Production of Bedding Plants

Yafuso

Fisher

2017

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Oxygen supply to the root zone is essential for healthy plant growth, and one technology that can potentially supply additional oxygen is the injection of purified oxygen (oxygenation) into irrigation water. The objective was to evaluate whether oxygenation of irrigation water affected plant growth and substrate dissolved oxygen (DO) levels during mist propagation of unrooted cuttings and subsequent growth in containers. Dissolved oxygen measured at source tanks for ambient tap water (averaging 7.1 mg·L−1) or oxygenated tap water (31.1 mg·L−1) was pumped through fine (69 µm) mist nozzles for propagation of Calibrachoa ×hybrid ‘Aloha Kona Dark Red’ and Lobelia erinus ‘Bella Aqua’. There were no measured differences in root length or root dry mass for Calibrachoa and Lobelia propagated using oxygenated water compared with ambient water because DO of ambient or oxygenated water reached ≈100% oxygen saturation in water (8.7 mg·L−1) after passing through mist nozzles. To evaluate subsequent growth without the effect on DO of fine emitters, rooted cuttings of these two plant species and Pelargonium ×hortorum ‘Patriot Red’ were grown in 10.2-cm diameter pots. The plants were irrigated with either ambient (6.0 mg·L−1) or oxygenated (27.7 mg·L−1) nutrient solutions, delivered by top watering or subirrigation when the substrate dried to ≈45% of container capacity (CC), measured gravimetrically. Oxygenated water did not enhance root or shoot growth compared with ambient water for the three bedding plants. In addition, Pelargonium growth was not enhanced when irrigated at high moisture level (maintained at 80% CC) with oxygenated water compared with ambient water. In container substrate without plants, it was possible to increase DO of the substrate solution by 68% when a high volume of oxygenated water (200% container volume or 850 mL) was applied by top watering because existing substrate solution was displaced. In contrast, when containers were subirrigated at 45% CC, the smaller 180-mL volume of oxygenated water was absorbed by the substrate and did not increase DO compared with ambient water. Overall, irrigating with oxygenated water did not enhance root or plant growth of three bedding plants grown in porous, peat-based substrate. To increase oxygen supply to roots in container production, growers should focus on having adequate air porosity in substrate and avoiding overwatering.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Oxygenation of Irrigation Water during Propagation and Container Production of Bedding Plants

Yafuso

Fisher

2017

horts

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“…Lei et al (2014) reconfirmed that water flow uniformity was greater than 95%, and the air flow uniformity remained above 70% with a surfactant concentration of 4 ppm. Lei et al (2016) showed retention characteristics of DO with different surfactant concentrations in aerated irrigation where a Venturi aeration system improved DO concentration in irrigation water and maintained DO above 3.5 ppm over 24 hours. Bhattarai et al (2015) classified bubbles generated using a Venturi aeration system as microbubbles (20 -500 μm), macrobubbles (1-10 mm), and as unseparated air lumps.…”

Section: Introductionmentioning

confidence: 97%

“…Lei et al . (2016) showed retention characteristics of DO with different surfactant concentrations in aerated irrigation where a Venturi aeration system improved DO concentration in irrigation water and maintained DO above 3.5 ppm over 24 hours.…”

Section: Introductionmentioning

confidence: 99%

Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water^*

Liu

Huan

Balsys

et al. 2020

Irrigation and Drainage

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Aerating water using microbubbles in irrigation for drip and subsurface drip irrigation systems has been reported to produce positive effects on plant growth and yield. However, maintaining the uniformity of bubble distribution in irrigation lines across long-row configuration is a challenge. Air injection of microbubbles in irrigation water using a gas diffuser (Seair Diffusion System, Model SA75) has a significant gain in dissolved oxygen (DO) distribution over 850 m length of drip tape. Furthermore, with oxygen injection with a Venturi, DO in irrigation water reached as high as 44 ppm and was maintained well above 35 ppm up to a distance of 700 m and did not drop below 20 ppm, even at a distance of 850 m. Pressure compensated emitters recorded significantly higher DO concentrations compared to nonpressure compensated emitters along the entire length of the irrigation line. Additionally, use of surfactant in irrigation water, up to 4 ppm, resulted in increased gas void fraction and DO concentration compared to the control for both air and oxygen injection irrigation. Highest oxygen saturation was recorded with 4 ppm surfactant, both for air injections (165%) and oxygen injection (438%) treatment along 200 m of non-pressure compensated drip tape.

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“…Thus, AI not only makes full use of the high WUE attributable to SDI, but also alleviates damage from the oxygen deficiency conditions induced by SDI [5,6,19]. Previous studies have shown that AI provides yield benefits to a range of crops, including soybean [19,20], cotton [19,21,22], tomato [6,23], pumpkin [24], chickpea [24], wheat [22], and corn [25,26].…”

Section: Introductionmentioning

confidence: 99%

Aerated Irrigation of Different Irrigation Levels and Subsurface Dripper Depths Affects Fruit Yield, Quality and Water Use Efficiency of Greenhouse Tomato

Zhu

Cai

et al. 2020

Sustainability

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Aerated irrigation (AI) is a method to mitigate rhizosphere hypoxia caused by the wetting front from subsurface drip irrigation (SDI). This study evaluated the impacts of AI on soil aeration, plant growth performance, fruit yield (tomato), irrigation water use efficiency (IWUE), fruit nutrition (lycopene and Vitamin C (VC)) and taste (soluble sugar, organic acid and sugar–acid ratio) quality. A three-factorial experiment including AI and SDI at three irrigation levels (W0.6, W0.8 and W1.0, corresponding with crop-pan coefficients of 0.6, 0.8 and 1.0) and two dripper depths (D15 and D25, burial at 15 and 25 cm, respectively), totaling 12 treatments overall, was conducted in a greenhouse during the tomato-growing season (April–July) in 2016. The AI improved soil aeration conditions, with significantly increased soil oxygen concentration and air-filled porosity relative to SDI. Moreover, the AI improved crop growth performance, with increased root morphology (diameter, length density, surface area and volume density), delayed flowering time, prolonged flowering duration and increased shoot (leaf, stem and fruit) dry weight, and harvest index. Fruit yield per plant, fruit weight, IWUE, the contents of lycopene, VC and soluble sugar, and sugar–acid ratio significantly increased under AI treatments (P < 0.05). As the irrigation level increased, fruit yield, number, and weight increased (P < 0.05), but IWUE and fruit lycopene, soluble sugar, and organic acid content decreased (P < 0.05). The dripper depth had no significant impact on fruit yield, nutrition and taste quality. Principal component analysis revealed that the optimal three treatments in terms of fruit yield, IWUE, and nutrition and taste quality were the treatments W0.6D25AI, W1.0D25AI and W1.0D15AI. These results suggest that AI can improve tomato growth performance and increase fruit yield, nutrition and taste quality, and IWUE through enhancing soil aeration conditions.

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Temporal and spatial dimension of dissolved oxygen saturation with fluidic oscillator and Mazzei air injector in soil-less irrigation systems

Cited by 20 publications

References 32 publications

Oxygenation of Irrigation Water during Propagation and Container Production of Bedding Plants

Oxygenation of Irrigation Water during Propagation and Container Production of Bedding Plants

Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water^*

Aerated Irrigation of Different Irrigation Levels and Subsurface Dripper Depths Affects Fruit Yield, Quality and Water Use Efficiency of Greenhouse Tomato

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Temporal and spatial dimension of dissolved oxygen saturation with fluidic oscillator and Mazzei air injector in soil-less irrigation systems

Cited by 20 publications

References 32 publications

Oxygenation of Irrigation Water during Propagation and Container Production of Bedding Plants

Oxygenation of Irrigation Water during Propagation and Container Production of Bedding Plants

Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water*

Aerated Irrigation of Different Irrigation Levels and Subsurface Dripper Depths Affects Fruit Yield, Quality and Water Use Efficiency of Greenhouse Tomato

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Product

Resources

About

Factors of relevance for improving the uniformity of oxygen distribution in drip irrigation water^*