四旁杨树在江苏省森林资源中具举足轻重的地位，四旁杨树覆盖面积的科学折算对评价江苏林业建设成效有重要意义。笔者采用系统布点的方法，利用11 802株四旁杨树的调查资料，运用散点图分析找出其胸径与冠幅的关系，编制江苏四旁杨树覆盖面积折算标准表，并经F检验得出该标准表在江苏适用。

Oddpopulus play important roles in accounting for the forest resource of Jiangsu province, so a scientific conversion standard for coverage area of oddpopulus is needed for evaluation of Jiangsu forestry construction establishment. This paper adopted systematic sampling method by utilizing the survey of 11 802 oddpopulus. By using scatter diagram analysis, the correlation of DBH and canopy was obtained, then conversion standard for converge area of oddpopulus in Jiangsu province was established, the standard was reliable by the F test.