• 研究报告 •

### 秦岭牛背梁自然保护区巴山冷杉(Abies fargesii)树轮宽度对气候变化响应的分离效应

1. （西北大学城市与环境学院， 西安 710127）
• 出版日期:2016-08-10 发布日期:2016-08-10

### Response divergence of Abies fargesii treering widths to climate variation in the Niubeiliang Nature Reserve of the Qinling Mountains.

GAO Na, LI Shu-heng*, BAI Hong-ying,  WANG Jun

1. (College of Urban and Environmental Science, Northwest University, Xi’an 710127, China).
• Online:2016-08-10 Published:2016-08-10

Abstract: The heterogeneity of response of treering width of Abies fargesii to climate change in the Niubeiliang Nature Reserve of the Qinling Mountains was analyzed by dendroclimatological methods during periods of 1969-1992 and 1993-2013. The results showed that a divergence problem existed in the radial growth responses of A. fargesii to temperature indicators in the study area. The characterization of A. fargesii radial growth chronology series was explored by correlation analysis and response function analysis. During 1969-1992, the treering widths of A. fargesii did not correlate with the mean annual and seasonal temperature, but had significant negative correlations with the mean temperature of March and September and the precipitation of February and April in the current year. In addition, the treering width of A. fargesii showed a significant positive correlation with the mean temperature of May in the current year. During the period of 1993-2013, the treering widths of A. fargesii showed a significant positive correlation with the mean temperature of the previous autumn, especially in the previous October, while a negative correlation with the precipitation in February of the current year. Moreover, the treering width of A. fargesii was negatively correlated with the average rainfall in the previous winter during the two periods. This study indicated that in the context of global warming, the responses of A. fargesii radial growth to climatic variables were different in the two periods in the Niubeiliang Nature Reserve of the Qinling Mountains.