| 摘要: |
| 【目的】在2024年2月底的降温冻雨天气过程中，施秉县牛大场、白垛太子参基地的太子参幼苗出现了不同程度的冻害，为了寻找冻害产生的气象原因，【方法】本研究对调查点附近自动气象观测的气温、降水等资料进行了统计分析，对比不同海拔高度的太子参幼苗冻害程度，得到太子参苗期的冻害指标。【结果】研究结果表明，太子参幼苗具有较强的耐低温能力，但在长时间的低温冰冻天气中太子参幼苗将会出现冻害，且冻害程度随覆冰时间增加、最低气温的降低、负积温的增加和降水量的增大而加重。在冻雨天气里，当日最低气温连续3d维持在-4～-5℃之间，负积温达到12.5℃·d，持续覆冰2～3d时，太子参幼苗会出现轻微冻害；当日最低气温连续3d维持在-5～-6℃，负积温超过18.0℃·d，持续覆冰3～5d时，太子参幼苗有明显冻害；当日最低气温连续3d日≤-6℃，负积温超过20.0℃·d，持续覆冰时间超过5d时，太子参幼苗有严重的冻害。【结论】本研究中的太子参苗期冻害气象指标来自于生产实践，适合于贵州黔东南太子参种植基地，对黔东南太子参生产的气象服务具有一定指导意义。 |
| 关键词: 太子参; 苗期; 低温冻害; 气象指标 |
| DOI： |
| 投稿时间：2024-04-23修订日期：2024-06-28 |
| 基金项目:黔东南州科技计划项目黔东南科合基础〔2023〕06号 |
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| Study and analysis of meteorological indexes of freezing damage of Radix pseudostellariae seedlings |
| LIANG Ping |
| (Qiandongnan Meteorological Bureau of Guizhou Province) |
| Abstract: |
| Abstract: [Purpose] During the freezing and rainy weather at the end of February 2024, the seedlings of radix pseudostellariae in Niudachang and Baiduo base in Shibing County experienced varying degrees of freezing damage. [Methods] To identify the meteorological causes of freezing damage, this study conducted a statistical analysis of temperature, precipitation, and other data from meteorological observations near the survey site. The freezing damage indicators during the seedling stage of the radix pseudostellariae were obtained based on the comparative analysis of different degrees of freezing damage. [Results] Results showed that radix pseudostellariae seedlings had strong resistance to low temperature. However, freezing damage would occur when the low-temperature freezing weather lasts long. The degree of freezing damage increased with the increase of ice cover time, the decrease of minimum temperature, the increase of negative accumulated temperature, and the increase of precipitation. The radix pseudostellariae seedings were slightly freeze-damaged in freezing and rainy weather when the daily minimum temperature was maintained between -4 to -5 ℃ for three consecutive days, the negative accumulated temperature reached 12.5 ℃ per day, and the ice was continuously covered for 2-3 days. Obvious freeze damage occurred when the daily minimum temperature was maintained between -5 to -6 ℃ for three consecutive days, the negative accumulated temperature reached 18 ℃ per day, and the ice was continuously covered for 3-5 days. Severe freeze damage occurred when the daily minimum temperature lowered than -6 ℃ for three consecutive days, the negative accumulated temperature exceeded 18 ℃ per day, and the ice was continuously covered more than 5 days. [Conclusion] The above meteorological indexes are based on case analysis, which are suitable for the planting base of radix pseudostellariae in Qiandongnan, Guizhou, and have certain guiding significance for the meteorological service of the radix pseudostellariae production. |
| Key words: Radix pseudostellariae; Seedling stage; Low temperature freezing damage; Meteorological index |
