杨树人工林边缘效应的初步研究

摘要

The influences of edge effects within different directions on different places on growth of poplar in Liaoyang Region were studied .The result shows that :in three plots of 12-year-old Populus liaoningensis ,9-year-old Popu-lus × euramericana cv .N3930 ,8-year-old Populus × euramericana cv .N3930 ,depth of the edge in east direction are all maximum ;the edge effect is also shown by the largest ,followed by northern direction .In practice ,increas-ing the poplar trees in the eastern direction not only can increase the proportion of poplar in eastern edge of the woods in the entire forest ,but also can significantly improve biomass production & economic benefits of the poplar .%　　通过辽阳地区不同杨树林地不同方向上的边缘效应对杨树生长影响的研究，结果表明：在12年生辽宁杨、9年生3930杨和8年生3930杨3个样地中，皆以东部方向上的边缘深度最大，表现出的边缘效应亦最大，北部方向次之。实践中，可通过增加东部方向上杨树的株数，使杨树林东部边缘部分在整个林子中的比例增大，可显著提高杨树的生物产量和经济效益。