本文選題：臺灣青棗 + 寒凍害��； 參考：《自然災害學報》2017年04期

【摘要】：通過專家走訪和寒凍害災情調(diào)查,建立臺灣青棗的寒凍害形態(tài)學分級標準。根據(jù)近年來福建、廣西、廣東引種臺灣青棗的寒凍害調(diào)查資料,結(jié)合2014/2015年、2015/2016年冬季青棗的野外觀測和地理移置試驗,基于形態(tài)學分級建立災情樣本集。采用K-means聚類分析方法對災情樣本分析,獲取各寒凍害等級指標的閾值,最終建立基于日極端最低氣溫的臺灣青棗寒凍害等級指標,各級指標分別為:2.5℃T_d≤5.0℃,輕度;0℃T_d≤2.5℃,中度;-2.5℃T_d≤0℃,重度;T_d≤-2.5℃,嚴重。研究的等級指標采用典型年災情和人工氣候箱致災試驗結(jié)果驗證,準確率達90%以上。研究結(jié)果對引種臺灣青棗的合理布局及寒凍害監(jiān)測預警具有實際參考價值。
[Abstract]:Through expert visit and cold injury investigation, the morphological classification standard of cold injury of Taiwan green jujube was established. According to the investigation data of cold and freezing injury in Fujian, Guangxi and Guangdong in recent years, combined with the field observation and geographical relocation experiment of winter jujube in 2015 / 2015, the disaster sample set was established based on morphological classification. K-means cluster analysis method was used to analyze the disaster samples, and the threshold value of each index of cold injury grade was obtained. Finally, the index of freezing injury grade of Taiwan Qingzao jujube was established based on the daily extreme minimum temperature. The indexes of all levels were: 2.5 鈩，

本文編號：2031940