树木年轮密度实验方法及其在内蒙古准格尔旗树轮研究中的应用

在介绍树木年轮密度实验方法基本原理、国内外研究现状以及详细的实验方法和流程的基础上,建立了内蒙古准格尔旗油松树轮宽度年表,以及早材、晚材、最大、最小四个密度年表。年表之间相关分析表明树轮密度比宽度包含更多更复杂的气候环境变化因子。通过树轮密度年表与气象资料相关分析发现,准格尔旗树轮密度年表与该地区全年降水量之间有很好的相关性,早材密度和最小密度与降水量之间呈负相关关系,晚材密度和最大密度与降水量之间呈显著的正相关关系。无论正、负相关关系,均能够从树木生理角度予以合理解释。

Experimental Method of Density for Tree- ring Research and Its Application in Research of Tree Ring Data from Zhungeer County, Inner Mongalia

The tree-ring samples were collected from Zhungeer county,Inner Mongalia for densitometric study.Detail experimental method of tree-ring density was completely depicted.Based on the data set,we establish,earlywood density,latewood density,maximal density,minimum density chronology and ringwidth chronology.The correlations between all density chronology and the ring-width chronology indicated that the index of tree-ring density may reflect more climate information than the ring-width index.According to the correlation analysis between the density chronology and meteorological data,we found that low early-wood density and minimum density values were related to high precipitation,and high late-wood and maximal density values corresponded high precipitation.Whichever of positive or negative correlation were well explained by plant physiology.