东北东部樟子松幼林生长与立地因子关系研究

Relationships between Stand Growth and Site Factors in Young Mongolian Scots Pine Plantations in the Eastern Region of Northeast China

为了解东北东部山地引种区樟子松人工幼林生长与立地因子的关系,采用样地调查和平均木与优势木解析方法,调查和收集样地与解析木资料,利用数量化理论I计算各立地因子得分值,并检测生长指标与立地因子的相关性。研究结果表明,研究区域内不同地区的主导立地因子有所不同,影响小兴安岭南部引种区樟子松生长的主导立地因子是坡位、坡度和土层厚度,而张广才岭西坡的主导立地因子是土层厚度;张广才岭东坡的是坡度和黑土层厚度;长白山地以土层厚度和坡度为主导因子,大黑山南部以坡度为主导因子,大黑山北部以坡位为主导因子。综合本研究和相关研究结果可推出结论:土层厚度是影响东北东部山地引种区樟子松人工幼林生长发育的主导因子,凡能增加土层厚度的坡度、坡向和坡位都有利于樟子松林的生长发育。

The objective of this study is to explore the relationships between stand growth and site factors in young Mongolian Scots pine(Pinus sylvertris var. mongolica) plantations across the introduction areas in the eastern mountainous region of Northeast China. Using the method of plot investigation and analysis of average and dominant tree, the data of sample plots and stem analysis trees were investigated and collected. General linear model(GLM) approach was used to quantify the effects of site factors on stand growth, with correction for the effects of stand conditions. Our study showed that the main site factors varied greatly across the region. Slope position, steepness, and soil layer depth in the southern part of Xiaoxing’anling mountains, soil layer depth in the western part of Zhangguangcailing mountain, slope steepness and the depth of black soil layer in the eastern part of Zhangguangcailing mountain, soil layer depth and slope steepness in Changbaishan mountain, slope steepness in the southern part of Daheishan mountain, and slope position in the northern part of Daheishan mountain were main site factors, respectively. Our findings, together with other related research results, suggested that soil thickness was the leading factor, and the slope steepness, orientation and position associated with the increase depth of the soil layer would enhance the growth of Mongolian Scots pine plantations in the eastern mountainous region of Northeast China.