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通径分析最早是由S.wright(1921)提出的,应用于遗传育种的研究上,用以阐明相关变量间的因果关系。由于利用通径系数进行的通径分析,具有直观、精确等优点,因此近十几年来应用日趋广泛。在土壤科学领域里,在研究土壤性状与林木生长的关系中,除了林地所处的海拔高度、坡向、坡位、坡度等影响着林木生长外,可以看到土壤各性状因子如腐殖质层厚度、土壤养分状况、土壤质地、结构、有效土层厚度、障碍层次出现的部位和厚度等等,都和林木的生长密切相关,而且土壤各性状因子之间也有一定程度相关。在平原地区,土壤性状因子与林木生长的这种相关,更为
Path analysis was first proposed by S. Wright (1921) and applied to the study of genetics and breeding to elucidate the causal relationship between the related variables. Due to the use of path coefficient path analysis, with intuitive, accurate and so on, so more and more applications in recent decades. In the field of soil science, in addition to the elevation, slope direction, slope position and slope of the forest land which affect the relationship between soil properties and tree growth, it can be seen that the soil properties such as humus layer thickness , Soil nutrient status, soil texture, structure, effective soil thickness, appearing parts and thickness of the obstacle level and so on, are closely related to the growth of forest trees, and there is a certain degree of correlation between various traits of soil. In plain areas, this correlation between soil character factors and tree growth is more pronounced