發(fā)布時(shí)間：2018-06-17 17:56

  本文選題：臺(tái)灣青棗 + 寒凍害�。� 參考：《自然災(zāi)害學(xué)報(bào)》2017年04期

【摘要】：通過(guò)專(zhuān)家走訪和寒凍害災(zāi)情調(diào)查,建立臺(tái)灣青棗的寒凍害形態(tài)學(xué)分級(jí)標(biāo)準(zhǔn)。根據(jù)近年來(lái)福建、廣西、廣東引種臺(tái)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(cè)和地理移置試驗(yàn),基于形態(tài)學(xué)分級(jí)建立災(zāi)情樣本集。采用K-means聚類(lèi)分析方法對(duì)災(zāi)情樣本分析,獲取各寒凍害等級(jí)指標(biāo)的閾值,最終建立基于日極端最低氣溫的臺(tái)灣青棗寒凍害等級(jí)指標(biāo),各級(jí)指標(biāo)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(yán)重。研究的等級(jí)指標(biāo)采用典型年災(zāi)情和人工氣候箱致災(zāi)試驗(yàn)結(jié)果驗(yàn)證,準(zhǔn)確率達(dá)90%以上。研究結(jié)果對(duì)引種臺(tái)灣青棗的合理布局及寒凍害監(jiān)測(cè)預(yù)警具有實(shí)際參考價(jià)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(hào)：2031940