摘要
利用数理统计方法对1987~2014年的科尔沁沙地榆树物候观测资料和气象资料进行研究的结果表明:近28年来,科尔沁沙地的日照时数显著减少,平均气温呈上升趋势,降水量呈减少趋势。榆树花芽开放期呈提前趋势,展叶期和开花期较常年变化不显著,叶全变色期和落叶末期均显著推迟,生长季呈现延长趋势。平均气温是影响榆树物候期变化的主要因子,与花芽开放期、展叶始期、展叶盛期、开花始期和开花盛期呈负相关关系,而与叶全变色期、落叶末期和间隔日数呈正相关关系。日照时数主要对叶全变色期影响显著,呈负相关关系。降水量对榆树物候期变化影响不显著,可能存在非线性关系。
The phenological changes of Vlmus pumila and the climate changes during the period of1987~2014 in Horqin sandy land were discussed by the mathematical statistics method. The results showed that in the past 28 a to significantly reduce the sunshine hours, the temperature showed an upward trend,precipitation decreasing. Flower bud opening period showed an early trend, leave unfolding primary and prevailing phases, and blossoming primary and prevailing phase did not change significantly, leave coloring phase and leave falling ending phase were significantly delayed, the growing season showed increasing trend.The temperature is the main factor affecting phenology, was negatively correlated with the flower buds opening phase, leave unfolding primary and prevailing phases, blossoming primary and prevailing phases,while positively correlated with leave coloring phase and leave falling ending phase. Sunshine hours mainly effect of leave coloring phase, showed a negative correlation.
出处
《林业科技》
2017年第4期13-16,共4页
Forestry Science & Technology
基金
内蒙古自治区通辽市气象局科技创新项目"气候变化对通辽市动植物物候的影响"(201509)
关键词
科尔沁沙地
榆树
物候变化
Horqin sandy land
Vlmus pumila
Phenological changes
