浙江垂柳物候分析与气候因子关系研究

Phenological Analysis and Research of Relationship between Climatic Factors of Zhejiang Willow

本文根据自然物候观测资料,用趋势系数法对垂柳各物候期及气候因子统计分析,结果表明,近10年来,浙江垂柳的春季物候期提前约4.3 d,秋季物候期推后约7.2 d,生长季延长约11.5 d。2～3月的日平均气温与展叶始期和展叶盛期显著负相关,温度每升高1℃,两物候期分别提前4.6 d、4.7 d,2～3月的日照时数增多10 h,展叶盛期推后1.5 d,开花始期推后0.7 d;湿度增加促进秋冬季物候期提前。

According to natural phenological observation data of Zhejiang Province,I analyzed the relationship between different phenological stage and climate factors with mathematical statistics method.The results showed that,over the past 10 years,the spring phenological stage of willow in Zhejiang was brought forward 4.3 days,the autumn phenological stage postponed about 7.2 days,and the growing season was prolonged for 11.5 days.The relation of daily average temperature from February to March and leaf expansion beginning of stage and leaf unfolding prime stage was a significant negative correlation.Atmospheric temperature increased every 1 ℃,leaf expansion beginning of stage was early 4.6 days and leaf unfolding prime stage 4.7 days.Sunning hours from February to March increased every 10 hours,leaf unfolding prime stage postponed 1.5 days and flowering 0.7 days.Increased humidity impact that phenological stage would be brought forward.