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防护林更新方式是影响防护林持续防护效益发挥的重要措施。本文比较了加拿大杨不同更新方式对树木生长的影响 ,并确定了该地区加杨的不同更新年龄。
The ways of renewal of shelterbelts are important measures that affect the sustainable protection of shelterbelts. This paper compares the effects of different regeneration methods on tree growth in Populus canadensis and identifies the different ages of poplar regeneration in this area.