宁夏六盘山华山松年轮年表对生态气候指标的响应  

Response of chronology of Pinus armandi to eco-climate indicator in Liupan Mountain,Ningxia Province

作　　者：徐康[1] 王晓晖[1] 于明涛[2] 王棒[2] 关文彬[1,2] 

机构地区：[1]北京林业大学自然保护区学院 [2]北京林业大学水土保持与荒漠化防治教育部重点实验室,北京100083

出　　处：《中国水土保持科学》2011年第5期86-90,共5页Science of Soil and Water Conservation

基　　金：林业公益性行业科研专项经费项目"重要风景名胜区古树健康诊断与维持技术"(200904019)

摘　　要：利用树木年轮学方法建立六盘山华山松年表,并与生态气候指标进行相关分析,以重建1953—2003年六盘山地表干湿状况的代用资料。结果表明:华山松年轮宽度变化对5—7月的气温、3月和5月的降水量更为敏感;干燥指数优于单一气候因子成为该地区表述复杂的地表状况的生态气候指标;六盘山地区存在1953—1963年,1993—2003年2个干热期,并存在4～7年的小周期;20世纪80年代开始六盘山干燥度逐渐升高,近几年年降水量还可能处在历史较低水平,2011年的干燥指数大概为23.5,仍处于干热期。The correlation analysis between chronology of Pinus armandii in Liupan Mountain and eco-climate indicators was established to reconstruct the substitution data for surface moisture status from 1953 to 2003.The correlation analysis between chronology and single climatic factors（mean temperature and precipitation） showed that the radial growth was more sensitive to the temperature from May to July and the precipitation of March and May.Compared with the single climatic factors,the aridity index was a better eco-climate indicator that could indicate the local complex surface conditions.Using regression equation between standard tree-ring chronology and aridity index,surface conditions from 1953 to 2003 were reconstructed.The results showed that there were two relatively drought periods： 1953-1963 and 1993-2003,and the reconstructed series displayed significant cycles of 4-7 years.The aridity index increased gradually since 1980s,and the annual precipitation would be at lower level in a few years.The aridity index would be 23.5 in 2011,being still in the drought period.

关 键 词：树木年轮学 华山松 年表 相关分析 生态气候指标 六盘山 

分 类 号：S665.1[农业科学—果树学]