Welcome to Chinese Agricultural Science Bulletin,

Chinese Agricultural Science Bulletin ›› 2021, Vol. 37 ›› Issue (30): 77-82.doi: 10.11924/j.issn.1000-6850.casb2020-0797

Special Issue: 农业气象

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Last Frost Index of Dehydrated Green Pepper in Hetao Irrigation District

Bao Jiajing(), Kong Deyin()   

  1. The Agricultural Meteorological Experimental Station in Bayannaoer City, Linhe Inner Mongolia 015000
  • Received:2020-12-15 Revised:2021-02-15 Online:2021-10-25 Published:2021-12-08
  • Contact: Kong Deyin E-mail:412552430@qq.com;nmlaokong@126.com

Abstract:

To develop the meteorological service for last frost on dehydrated green pepper, the authors choose dehydrated green pepper variety ‘Qiemen’ as material, simulated the natural frost cooling process by using the MSX-2F artificial frost box system, and detected the frostbite and death statistics by measuring leaf temperature with the thermocouple probe. Combined with the changes of photosynthesis, the authors preliminarily established the meteorological index of last frost of dehydrated green pepper. The results showed that: (1) the minimum temperature for dehydrated green pepper to be frozen to death was ≤-4℃; (2) the freezing point of dehydrated green pepper was -2.7 to -3.2℃, the super cooling point was -3.4 to -4.8℃; (3) the dehydrated green pepper with relatively high seedling age had a stronger cold-resistance; (4) the land surface temperature index of light frost and heavy frost for dehydrated green pepper seedlings was -3.5℃ and -5.0℃, respectively.

Key words: dehydrated green pepper, super cooling point, freezing point, frost index, photosynthesis, Hetao irrigation district, last frost, meteorological service

CLC Number: