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中文摘要：
选择生长于祁连山中段的青海云杉作为研究对象,利用树木年轮的基本理论与方法,对径向生长轮的密度指标与当地气候因子变化做相关分析。结果表明,云杉树轮早材密度指标与研究区5月份降水量之间相关性显著,呈负相关关系,系数为-0.623。早材密度指标与研究区6月份温度之间相关性显著,呈正相关关系,系数为0.627。这些相关关系均能从树木生长生理学角度予以合理解释,符合树木生长及气候环境变化等基本自然规律。相关函数计算结果表明祁连山云杉树轮早材密度对气候变化的响应特征显著于晚材密度和晚材最大密度。
英文摘要：
The Picea crassifolia naturalized in the middle segment of Qilian Mountains are chosen for research in this paper.With the basic theories and methods of chronology,the responses of the density of wood growth to climate environmental conditions are analyzed using simple correlation.The results indicate that there are significant negative correlations between the density of early wood and precipitation research in May,and the relative coefficient is-0.623.And there are significant positive correlations between the density of early wood and temperature research in June,and that the relative coefficient is 0.627.All correlations can be explained rationally from the physiology of tree growth.The explanation is in consistent with the law of nature that the tree growth is affected by climate environmental conditions.The calculated results from the correlation functions indicate that the response features of early wood density of Picea crassifolia tree-rings in Qilian Mountains to climate changes are significantly superior to the latewood density and the latewood maximum density.
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Analysis of the Correlation between the Geographical Distribution of Populus euphratica Oliv. and th
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