Abstract: The phenophases change of woody plant and its responses to climate warming was analyzed by using the methods of linear trend method,Pearson correlation coefficient,EOF and REOF,based on woody plant phenological data from 10 national agro-meteorological stations and meteorological data from 47 stations from 1981 to 2006 in Hebei province.The results showed that the first leafing date of woody plants advanced in last 26 years,and most obvious in eastern coastal plain,following as central-southern plain,and the north-west mountain region not obvious.The first leaf coloring date delayed and the growing season extended.The spring temperature had significantly impact on first leafing date of woody plant,which could advance 4.6 days under 1℃ increasing.The trends of growing season had significant positive correlation to that of annual mean temperature in all stations.The result was helpful to study the relationship between phenophases and climate change in Hebei province.

Key words: Woody plants, Woody plants, Phenophases, First leafing date, Spring temperature, Climate warming