引种台湾青枣的寒冻害等级指标研究

发布时间：2018-06-17 17:56

  本文选题：台湾青枣 + 寒冻害　； 参考：《自然灾害学报》2017年04期

【摘要】：通过专家走访和寒冻害灾情调查,建立台湾青枣的寒冻害形态学分级标准。根据近年来福建、广西、广东引种台湾青枣的寒冻害调查资料,结合2014/2015年、2015/2016年冬季青枣的野外观测和地理移置试验,基于形态学分级建立灾情样本集。采用K-means聚类分析方法对灾情样本分析,获取各寒冻害等级指标的阈值,最终建立基于日极端最低气温的台湾青枣寒冻害等级指标,各级指标分别为:2.5℃T_d≤5.0℃,轻度;0℃T_d≤2.5℃,中度;-2.5℃T_d≤0℃,重度;T_d≤-2.5℃,严重。研究的等级指标采用典型年灾情和人工气候箱致灾试验结果验证,准确率达90%以上。研究结果对引种台湾青枣的合理布局及寒冻害监测预警具有实际参考价值。
[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，

本文编号：2031940