【摘要】 强低温常给龙眼树造成伤害,重则死亡,探讨龙眼树的冻害指标对龙眼树的合理布局和低温预警具有重要意义。为此,本文收集福建省近几年冬季低温考察资料、龙眼树冻害调查资料,引用考察文献中的龙眼树冻害和同期的低温资料,参考广西壮族自治区气象减灾研究所1999/2000年冬季10多县(市)龙眼树冻害的照片资料和对应的低温资料;经统计处理整理成同时同地龙眼树的冻害级别与百叶箱中的最低气温资料;相关分析表明:龙眼树冻害级别与最低气温间可以用一元二次方程拟合,龙眼树的无冻害、轻冻害、中冻害、重冻害、严重冻害对应的最低气温分别为-0.2℃、-1.6℃、-2.6℃、-3.3℃、-3.5℃;各冻害级别之间平均温差随着冻害级别的提高而缩小。更多还原

【Abstract】 Longan trees often were harmed by the severe low temperature in winter,even to die.It is very important to study the indicators of freezing injury to Longan trees for the low temperature forecast and reasonable planting distribution.The data of the low temperature in winter and the occurrences of the low temperature damage to Longan trees of Fujian Province in recent years were investigated.The literature on the freezing injury of the Longan trees and the low temperature were reviewed.The photo data of the freezing damage of Longan trees in 1999-2000 in the ten counties in Guangxi provided by Guangxi Meteorological Disaster Mitigation Institute were referenced.The freezing damage grades of Longan trees and the coinstantaneous lowest temperature data in wooden screen were statistically analyzed.The correlation analysis results showed that the grades of freezing damage to Longan trees could be divided into five grades,namely no freezing injury,light freezing injury,medium freezing injury,severe freezing injury and extremely severe freezing injury.The corresponding maximum temperature was by-0.2,-1.6,-2.6,-3.3,and-3.5℃ for the different freezing injury grades respectively.Furthermore,with the increase of the freezing injury grades,the differences of the average temperature for the different freezing injury grades decreased.更多还原