Based on the investigation of 35 plantations of clone I 69, the difference between edge tree and standing tree in DBH, tree crown, tree height and volume was compared.

• 通过调查研究不同密度，不同林龄I－69杨林分中边行木及林木在胸径、冠幅、树高及材积生长进程的差异，探讨了林木生长的边行优势在杨树胶合板材定向培育中的应用。