Analysis of the Factors Affecting the Deposition Coverage of Air-Assisted Electrostatic Spray on Tomato Leaves

In order to investigate the effects of various factors (charging voltage, spray distance and spray pattern) on the deposition coverage of tomato leaves, the Box–Behnken surface response methodology was used to design an outdoor air-assisted electrostatic spraying experiment with three factors and th...

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Bibliographic Details
Published inAgronomy (Basel) Vol. 14; no. 6; p. 1108
Main Authors Guo, Jili, Dong, Xiaoya, Qiu, Baijing
Format Journal Article
LanguageEnglish
Published Basel MDPI AG 01.06.2024
Subjects
Air flow
Charging
Crops
Deposition
deposition coverage rate
Droplets
Electric fields
Electric potential
Experiments
flat-fan nozzle
Humidity
Leaves
Nozzles
Regression analysis
spray distance
spray pattern
Spraying
Tomatoes
Variance analysis
Velocity
Voltage
voltage polarity
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Summary:In order to investigate the effects of various factors (charging voltage, spray distance and spray pattern) on the deposition coverage of tomato leaves, the Box–Behnken surface response methodology was used to design an outdoor air-assisted electrostatic spraying experiment with three factors and three levels. The deposition coverage of tomato leaves in the upper, middle and lower layers was collected under different polarity charging voltages (0, +10 kV, −10 kV), spray distances (1, 3, 5 m) and spray patterns (ascending spray, descending spray, fixed height spray). Regression analysis and variance analysis were performed on the experimental data to determine the optimal working parameters. The results showed that (1) spray distance is the most important factor affecting the droplet coverage rate in the process of air-assisted electrostatic spraying; (2) the droplet coverage rate of air-assisted electrostatic spraying is optimal when the charging voltage polarity is negative voltage, the spray distance is 2.75 m, and the spray pattern is descending spray. The following conclusions were obtained. (1) In air-assisted electrostatic spraying, the distribution of air flow had the greatest effect on droplet deposition on tomato leaf surface. (2) Compared with air-assisted non-electrostatic spray, air-assisted electrostatic spray had a better deposition effect.
ISSN:2073-4395
2073-4395
DOI:10.3390/agronomy14061108