The response to hydrothermal condition of Sorbaria kirilowii in Xinglongshan Natural Reserve

Sorbaria kirilowii belongs to Rosaceae, with obvious ecological value such as resistant to diseases and insects, which is also a main shrub species in Xinglongshan Natural Reserve. Through two periods, 2004-2007 and 2012-2015, nine types phenologic phase of S. kirilowii in Xinglongshan National Natural Reserve were observed to analyze the change tendency of phenologic phase of S. kirilowii and explore the relationships of phenologic phase to monthly mean temperature and precipitation. The results indicated that most Spring phenologic phases for S. kirilowii showed a trend of delay but an advanced trend of Autumn phenologic phases, which caused the decrease of growth period, as much as 15.49 da-1. The trend of phenologic phases could be resulted from the phonologic phases of S. kirilowii correlated significantly with monthly mean temperature and precipitation. The blooming and fruit expansion periods are significantly negative correlated with mean temperature of April. There are significantly negative correlations between budding period and the precipitation of February, branching and the precipitation of May, fruit expansion period and the precipitation of July, while there is significantly positive correlation between fruit ripe period and the precipitation of October. Growth decrease caused by regional climate change influence not only propagation, but brush canopy density, which against animals living, such as Moschus sifanicus.