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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。结果表明，胸径、冠幅及材积的边行生长优势随林分密度的增大而增大，但边行木与林木在树高生长上差异不显著；边行所处的方位不同，其边行生长优势也存在差异。４个不同方位中，以东方位的边行生长优势最大，西方位次之，北方位最小；不同密度的林分，边行生长优势出现的时间不同，密度越大，出现的时间越早。４００株／ｈｍ２的Ｉ－６９杨林分，７～８年间表现出边行生长优势。笔者根据林分边行生长优势原理，提出了杨树胶合板材人工林的适宜造林密度，合理的种植点配置方式和优化的杨粮间作模式，为平原农区发展杨树胶合板材人工林基地提供了依据。
By investigating the differences of DBH, crown width, tree height and volume growth of I-69 poplar forest with different densities and ages, the edge-rowing advantages of poplar plywood were discussed. Cultivation of applications. The results showed that the edge growth of breast diameter, crown width and volume increased with the increase of stand density, but there was no significant difference in height growth between border row and tree stand. There are also differences in growth advantages. Of the four different orientations, the easterlies have the largest growth advantage, the lowest in the west, and the lowest in the north. With different densities, the growing advantages of the forested edge occur at different times, and the greater the density, the earlier the emergence. 400 / hm2 of I-69 Yang Lin points, 7 to 8 years showed edge growth advantages. Based on the principle of growth of edge plots, the author puts forward the suitable planting density of poplar plywood plantation, the reasonable arrangement of planting points and the optimized intercropping pattern of poplar and grain, providing the poplar plywood plantation base The basis.