| Study on frost indicators during blooming and fruiting periods of two peach varieties in Ningxia |
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| DOI：10.7606/j.issn.1000-7601.2023.05.24 |
| Key Words: peach field frost test frost indicators subrcooling capacity critical temperature |
| Author Name | Affiliation | | LIANG Xiaojuan | College of Enology and Horticulture, Ningxia University, Yinchuan，Ningxia 750021, China
Key Laboratory of Agricultural Meteorological Disaster Monitoring, Early Warning and Risk Management in Dry Areas, China Meteorological Administration, Yinchuan, Ningxia 750002, China | | ZHANG Xiaoyu | College of Enology and Horticulture, Ningxia University, Yinchuan，Ningxia 750021, China
Key Laboratory of Agricultural Meteorological Disaster Monitoring, Early Warning and Risk Management in Dry Areas, China Meteorological Administration, Yinchuan, Ningxia 750002, China
Ningxia Institute of Meteorological Science, Yinchuan, Ningxia 750002, China | | YANG Yonge | College of Enology and Horticulture, Ningxia University, Yinchuan，Ningxia 750021, China
Key Laboratory of Agricultural Meteorological Disaster Monitoring, Early Warning and Risk Management in Dry Areas, China Meteorological Administration, Yinchuan, Ningxia 750002, China | | WEI Jianguo | Ningxia Institute of Meteorological Science, Yinchuan, Ningxia 750002, China | | MA Mengyao | College of Enology and Horticulture, Ningxia University, Yinchuan，Ningxia 750021, China
Key Laboratory of Agricultural Meteorological Disaster Monitoring, Early Warning and Risk Management in Dry Areas, China Meteorological Administration, Yinchuan, Ningxia 750002, China | | MA Peng | Ningxia Zhengguo Agricultural Techology Co. Ltd., Zhongning, Ningxia 751200, China | | ZHANG Jing | Ningxia Zhengguo Agricultural Techology Co. Ltd., Zhongning, Ningxia 751200, China | | HAO Simin | Ningxia Zhengguo Agricultural Techology Co. Ltd., Zhongning, Ningxia 751200, China |
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| Abstract: |
| To improve the rational layout of peach orchards and the ability of frost monitoring, forecasting, evaluating and preventing in Ningxia, ‘Huayu’ and ‘Ruiguang 39’ peach varieties were used as research objects to conduct in\|situ tests using field frost test chamber to simulate low\|temperature environments in April to May 2022. The study set four treatment temperatures at each growth period, lasting 0.5 h. The flowers and fruits in natural state were used as CK. We investigated the freezing rate of blooming period, bean fruit period and young fruit period under different low\|temperature treatments and combined with indoor microscopic observations and overcooling points to determine the frost indicators for flowers (young fruits) of two peaches in Ningxia. The results of the in\|situ tests indicated that fruit trees were probably subjected to frost damage at temperatures slightly above their overcooling point. There were significant differences in frost indicators at different growth periods of peach, the resistance of peach at blooming period > bean fruit period > young fruit period. The resistance of different varieties differed significantly, and the resistance of ‘Ruiguang 39’ and ‘Huayu’ were basically comparable during the blooming period, but its resistance was significantly weaker than that of ‘Huayu’ at bean fruit period and young fruit period. ‘Huayu’ bean fruits were lightly frozen at -1.10℃ and heavily frozen at -2.68℃, while ‘Ruiguang 39’ was lightly frozen at -0.96℃ and heavily frozen below -2.16℃. The young fruits of ‘Huayu’ were lightly frozen at -1.75~-0.48℃, and heavily frozen below -2.40℃. The young fruits of ‘Ruiguang 39’ were lightly frozen when the temperature reached -0.52℃, and heavily frozen when they encountered the low temperature of -1.41℃. |
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