Abstract
To verify the influence of frost protection windmachine with continuous oscillation on microclimate, the experimental study was conducted in a tea field in Zhenjiang, China on a typical radiation frost night. Disturbed airflow variation and protection effect were investigated. Airflow velocity of 8 points at different distance from the machine was measured during an oscillation period with an anemometer, and temperature variation of 48 points at different distance from the machine and different height above the ground was measured with temperature recorders. The changes of airflow velocity and temperature were analyzed. Where the velocity was high, the airflow-disturbed duration was as well as large. Airflow velocity at each point presented a trend of rise, fluctuation, and decline under the action of windmachine with continuous oscillation. The temperature rise with the same distance from the machine was close, among which the 10 m and 20 m away from the machine increased greatly. Disturbed airflow enlarged the temperature difference between the top and the bottom of the canopy. The windmachine with continuous oscillation is proved to be effective for tea frost protection and provides more coverage than traditional anti-frost fan with flabellate oscillation.
Highlights
Frost is a common agro-meteorological disaster, which brings great harm to the growth of tea trees and other crops (Cittadini, et al, 2006; Gu, et al, 2008; Lu, et al, 2015)
To verify the influence of frost protection windmachine with continuous oscillation on microclimate, the experimental study was conducted in a tea field in Zhenjiang, China on a typical radiation frost night
The airflowdisturbed duration is the span of the disturbed airflow that can be detected at measurement points
Summary
Frost is a common agro-meteorological disaster, which brings great harm to the growth of tea trees and other crops (Cittadini, et al, 2006; Gu, et al, 2008; Lu, et al, 2015). Many studies have confirmed that frost protection windmachine could effectively raise the temperature of the canopy (Bey-Marshall, et al, 2019; Heusinkveld, et al, 2019; Wu, et al, 2015), and could as well as increase the yield and quality of crops in the covered area (Blank, et al, 1995; Hu, et al, 2013). These studies mostly confirm the reliability of frost protection by comparing the conditions inside and outside the covered area
Sign-in/Register to view highlights & summary Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
