Responses of Tree-ring Width of Pinus massiniana to Climate Change in Sanming,Fujian Province

According to the standard principles and methods of Dendrochronology,we used the treering samples of Pinus massiniana in Sanming to study their responses to climate change. The results of correlation analysis showed that the radial growth of Pinus massiniana was significantly correlated with the July-August temperature in the previous year and the July-August mean temperature of the current year( P 0. 01). The radial growth showed significant correlations with the precipitation from last year January-March( P 0. 01) and current year June-November( P 0. 01). The chronology had significant correlations with the relative humidity in the previous February-March( P 0. 01) and the current July-August( P 0. 01). Besides,significant positive correlations were observed between the tree ring width and the sunshine hours of the previous February-March( P 0. 01). In addition,the growth of Pinus massoniana showed significant positive correlations with PDSI from June to November,suggestinga drought stressed growth pattern. Our study indicates that tree growth in this region is influenced by various factors and the climate-growth relationships vary over time within a year.