| Study on the supercooling and freezing points of the main organs of wine grapes in spring in Helan Mountain’s eastern foothills production region |
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| DOI：10.7606/j.issn.1000-7601.2026.02.18 |
| Key Words: wine grape supercooling point freezing point sprout the eastern foothills of Helan Mountain |
| Author Name | Affiliation | | ZHANG Lei | Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, CMA, Yinchuan, Ningxia 750002, China
Ningxia Key Lab of Meteorological Disaster Prevention and Reduction, Yinchuan, Ningxia 750002, China
Ningxia Institute of Meteorological Sciences, Yinchuan, Ningxia 750002, China | | LI Na | Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, CMA, Yinchuan, Ningxia 750002, China
Ningxia Key Lab of Meteorological Disaster Prevention and Reduction, Yinchuan, Ningxia 750002, China
Ningxia Institute of Meteorological Sciences, Yinchuan, Ningxia 750002, China | | LI Yang | Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, CMA, Yinchuan, Ningxia 750002, China
Ningxia Key Lab of Meteorological Disaster Prevention and Reduction, Yinchuan, Ningxia 750002, China
Ningxia Institute of Meteorological Sciences, Yinchuan, Ningxia 750002, China | | GUO Xiaolei | Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, CMA, Yinchuan, Ningxia 750002, China
Ningxia Key Lab of Meteorological Disaster Prevention and Reduction, Yinchuan, Ningxia 750002, China | | JIANG Linlin | Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, CMA, Yinchuan, Ningxia 750002, China
Ningxia Key Lab of Meteorological Disaster Prevention and Reduction, Yinchuan, Ningxia 750002, China
Ningxia Institute of Meteorological Sciences, Yinchuan, Ningxia 750002, China | | SHANG Yan | Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, CMA, Yinchuan, Ningxia 750002, China
Ningxia Key Lab of Meteorological Disaster Prevention and Reduction, Yinchuan, Ningxia 750002, China | | XU Rui | Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, CMA, Yinchuan, Ningxia 750002, China
Ningxia Key Lab of Meteorological Disaster Prevention and Reduction, Yinchuan, Ningxia 750002, China
Ningxia Institute of Meteorological Sciences, Yinchuan, Ningxia 750002, China | | WEI Jianning | Key Laboratory for Meteorological Disaster Monitoring and Early Warning and Risk Management of Characteristic Agriculture in Arid Regions, CMA, Yinchuan, Ningxia 750002, China
Ningxia Key Lab of Meteorological Disaster Prevention and Reduction, Yinchuan, Ningxia 750002, China |
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| Abstract: |
| Using five widely planted wine grape varieties, ‘Cabernet sauvignon’, ‘Chardonnay’, ‘Merlot’, ‘Pinot noir’, and ‘Marcelan’, from the eastern foothills of the Helan Mountains as materials, the supercooling and freezing points of winter buds, new shoots, and inflorescences were measured using a frost simulation test chamber. The results showed that the supercooling points of winter buds of five grape varieties for winemaking were significantly lower than those of new shoots and inflorescences, mostly around -5℃ to -6℃. The supercooling points of new shoots and inflorescences were relatively close, around -4℃. In the three developmental stages of winter buds (expanding, pompon\|like, and opening stage), the supercooling point during the opening stage was generally 0.6℃ higher than that during the expanding and pompon\|like stages. The supercooling points during the expanding and pompon\|like stages were relatively close, mostly around -6℃. The freezing points of organs of the five wine grape varieties were, from low to high, winter buds, inflorescences, and new shoots. The three developmental stages of winter buds increased gradually, with the swelling stage below -4.5℃, the pompon\|like stage between -4.6℃ and -3.1℃, and the opening stage between -3.1℃ and -2.5℃. Although the supercooling and freezing points of various organs among the five wine grape varieties were not completely identical, the overall differences were relatively small, mostly within 0.4℃. The range, frequency distribution of supercooling points, and supercooling capacity varied among different varieties, organs, and developmental stages. In the eastern foothills of Helan Mountain production area, the supercooling capacity of the five winegrape varieties during the winter bud expanding stage ranges from 0.9℃ to 1.5℃, during the winter bud pompon\|like stage from 1.7℃ to 2.5℃, during the winter bud opening stage from 1.6℃ to 2.5℃, during the new shoot stage from 1.7℃ to 2.3℃, and during the inflorescence stage from 1.3℃ to 1.7℃. |
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