托什干河流域额河杨和雪岭云杉径向生长对环境的响应对比

摘要

In the arid central Asia, the broad-leaved species was rarely used in dendroclimatology and dendrohydrology. In this paper, the samples of Populus xjrtyschensis and Picea schrenkiana were collected in Tuoshigan River Basin. We developed the two tree-ring chronologies using standard dendrochronological methods. Correlation and response analysis show that the radial growth of Populus Xjrtyschensis and Schrenk spruce weakly response to climate. The Schrenk spruce of upper timberline better responses to the PDSI in spring. The radial growth of trees may be affected by variety of meteorological factors. Meanwhile, the radial growth of Populus Xjrtyschensis responses to summer runoff, and Schrenk spruce responses to runoff of hydrological year. This study provides a reference for reconstructing the historical climate and hydrological variability in Tianshan Mountains using broad-leaved species.%利用采自天山南坡托什干河流域的额河杨（Populus xjrtyschensis Ch. Y. Yang）和山区森林上线的雪岭云杉（Picea schrenkiana Fisch. et Mey）树轮样本，分别建立树轮宽度年表，选用相关函数法结合阿合奇气象站和沙里桂兰克水文站的逐月降水、温度和径流等主要环境因子，分析托什干河不同树种树木径向生长对环境因子的响应。研究表明，额河杨和森林上线的雪岭云杉树木径向生长对气候的响应均较差，位于森林上线的雪岭云杉对春季PDSI响应较好。托什干河流域树木径向生长可能受多种气象因子综合影响。同时，额河杨和雪岭云杉与径流量的相关性较高，额河杨树木径向生长响应夏季径流量，而雪岭云杉可以更好地响应水文年的径流量。本研究为利用阔叶树种重建天山山区历史气候水文变化提供参考。