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通过胡杨树轮宽度的分析,建立了内蒙古额济纳地区过去233年来的STD,RES和ARS年表;并将树轮STD年表与采样点附近额济纳气象站的气温、降雨量以及狼心山水文站的地下水水位等记录进行了相关分析。结果表明,在额济纳地区显著影响该地胡杨生长的主要限制因子是地下水水位。胡杨树轮宽度年表与冬季及全年地下水水位相关性最高,分别为-0.808(p<0.01)和-0.724(p<0.05)。在此基础上,设计转换方程,重建了额济纳地区过去232年来冬季及全年地下水水位变化历史,冬季地下水水位重建方程的解释方差达76.3%(调整自由度后为70.4%,n=11,r=0.874,F=12.881,p<0.003),全年地下水水位重建方程的解释方差为72.8%(调整自由度后为66.1%,n=11,r=0.854,F=10.731,p<0.005)。
Based on the analysis of tree-ring width of Populus euphratica, the STD, RES and ARS chronology of the past 233 years have been established in the Ejina region of Inner Mongolia. The temperature and rainfall of the tree ring STD chronology and Ejin meteorological station near the sampling point, Groundwater level record and other related analysis. The results show that the main limiting factor that significantly affects Populus euphratica growth in Ejin area is the groundwater level. Populus tree round width chronology table has the highest correlation with winter and annual groundwater level, -0.808 (p <0.01) and -0.724 (p <0.05) respectively. On this basis, the transformation equations are designed and the history of groundwater level changes in Ejina region over the past 232 years is reconstructed. The variance of interpretation of groundwater level in winter is 76.3% (70.4% after adjustment for degree of freedom, n = 11, r = 0.874, F = 12.881, p <0.003). The explanatory variance of the groundwater level reconstruction equation for the whole year was 72.8% (66.1% after adjustment for degree of freedom, n = 11, r = 0.854, F = 10.731, p <0.005).