孑遗植物水松种源高径生长的空间变异及其分形特征

摘要

The average increment of diameter at breast height ( DBH) and tree height of Glyptostrobus pensilis from different provenances were studied by combining geostatistical methods with fractal theory. The fractal dimensions of DBH and tree height growth of G. pensilis were calculated in order to reveal the rule of spatial distribution variation. Results showed that the fractal dimensions of DBH and tree height were 1.635 and 1. 824, respectively. DBH can be used as an index for evaluating different provenances of G. pensilis to reflect the spatial variability.%以珍稀濒危植物水松(Glyptostrobus pensilis)不同种源树高和胸径平均生长量为研究对象,将分形理论与地统计学原理相结合,计算水松种源树高和胸径生长的分形维数,揭示其空间分布变异规律和分形特征.结果表明:水松种源胸径、树高生长特性的分维值分别为1.635和1.824,胸径的分维值小于树高的分维值.为反映水松种源的空间差异性,在评价水松种源时应选取胸径生长指标.