百香果寒冻害低温等级指标研究

Study on the grade index of cold and freezing injury of passion fruit

根据2016—2021年的38例百香果寒冻害灾情样本资料,结合百香果寒冻害受害症状分级标准,采用回归分析方法,确定基于极端最低气温的百香果寒冻害等级指标。各级寒冻害低温等级指标分别为:T_(min)>2.5℃,无寒冻害;0℃<T_(min)≤2.5℃,轻度;-2.0℃<T_(min)≤0℃,中度;-3.0℃<T_(min)≤-2.0℃,重度;T_(min)≤-3.0℃,极重。研究的等级指标利用典型寒潮过程11例灾情样本验证准确率达90%以上,利用人工气候室低温致灾试验64例灾情样本验证准确率达84.4%。研究结果对百香果的合理布局、适时定植和寒冻害监测预警具有实际的参考价值。

Based on 38 cold and freezing injury sample disaster data of passion fruit from 2016 to 2021,combined with the classification standard of cool and freezing injury,the cold and freezing injury grade index of passion fruit was preliminary obtained by using regression analysis method based on the extreme minimum temperature.The results showed that the cold and freezing injury grades of passion fruit were determined as:T_(min)>2.5℃,without cold and freezing injury;0℃<T_(min)≤2.5℃,light injury;-2℃<T_(min)≤0℃,moderate injury;-3℃<T_(min)≤-2℃,severe injury;T_(min)≤2.5℃,the most severe injury.The grade index of the research was verified by 11 disaster investigation samples of the typical cold wave processes,with accuracy rates of more than 90%,and 64 disaster samples of intelligent artificial climate chamber experiment,with accuracy rates of 84.4%.The results have practical value for rational distribution,colonization in a timely manner and cold and freezing injury monitoring-warning of passion fruit.