Influences of Sprinkler Frost Protection on Air and Soil Temperature and Chlorophyll Fluorescence of Tea Plants in Tea Gardens

Qingmin Pan, Yongzong Lu and Yongguang Hu ()
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Qingmin Pan: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Yongzong Lu: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China
Yongguang Hu: School of Agricultural Engineering, Jiangsu University, Zhenjiang 212013, China

Agriculture, 2024, vol. 14, issue 12, 1-13

Abstract: Sprinkler irrigation is an effective method for protecting economic crops from frost damage; however, current research on its impacts is insufficient and lacks comprehensive evaluation. This research investigated the effects of sprinkler irrigation for frost protection on the air, soil, and tea plants in the tea garden. Sprinkler frost protection experiments were conducted in the tea garden, where temperature sensors measured the air and soil temperatures, and Monitoring-PAM was used to measure the chlorophyll fluorescence parameters (Fv/Fm) of the tea plants. The results indicated that lower initial ambient temperatures or smaller droplet sizes accelerate the rate of air temperature increase and slow the cooling rate. Under conditions of heavy frost, ice formation from irrigation water acts as an insulating layer, protecting the inter-row soil. Additionally, the Fv/Fm values of tea leaves protected by sprinkler irrigation ranged from 0.6 to 0.7, and were significantly higher than those of leaves exposed to frost damage. The results also showed that air and soil temperature and tea Fv/Fm can be used to perform a comprehensive assessment of sprinkler frost protection effectiveness.

Keywords: sprinkler irrigation; frost protection; tea tree; air temperature; soil temperature; chlorophyll fluorescence; Fv/Fm (search for similar items in EconPapers)
JEL-codes: Q1 Q10 Q11 Q12 Q13 Q14 Q15 Q16 Q17 Q18 (search for similar items in EconPapers)
Date: 2024
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