单性木兰开花物候与气象因子的相关性分析

Correlation Analysis of Flowering Phenology of Kmeria septentrionalis and Meteorological Factors

2006～2010年对单性木兰开花物候与主要气象因子进行同步观测研究,分析其开花物候的变化规律及与气象因子的相关性。结果表明,(1)单性木兰的始花期、盛花期、末花期年度差异显著;(2)单性木兰开花物候与气温及前期积温呈显著负相关,当前1月、3月平均气温每升高1℃,其始花期就提前1.3～2.4天;(3)降雨量和相对湿度对花期物候具有延缓作用;(4)始花期分别与开花数和座果数呈显著负相关。研究结果对濒危植物单性木兰的就地与迁地保护提供了重要的参考依据。

In order to analyze the correlation between meteorological factors and flowering phenology of Kmeria septentrionalis,above both factors were observed simultaneously from 2006 to 2010.The results showed that： 1） There were significant differences between each year＇s initial,fully and final blooming stages;2） The flowering phenology of K.septentrionalis was negatively correlated with temperature and pre-accumulated temperature.The initial blossoming stage was 1.3~2.4 days in advance when average temperature increasing 1℃ in January and March;3）Precipitation and relative humidity can delay the flowering phyenology;4） Initial blooming stage had significant negative correlation with the flower and fruit number.The research results provided an important reference for conservation activities of endangered species K.septentrionalis.