【摘要】 樟子松固沙林在生产实践中一般按兼用林经营。为取得最佳防护效益和经济效益 ,采用定位观测和定量分析方法 ,对其有主导影响的密度问题进行了研究。结果表明 ,密度对主要林分因子和树冠发育均有显著影响。密度对林分产量影响遵循密度效应规律 ,有自然稀疏过程。抚育间伐是人为调节林分密度的重要手段 ,既提高林分的稳定性 ,又有可观的间伐经济收入。本项研究为樟子松人工固沙林经营提供了可靠的科学依据更多还原

【Abstract】 In order to obtain optimum ecological and economical benefits,using locational test and quantitative analysis,was studied density,that has significant effect on main factors of stand and crown development.Tending and intermidiale cutting is an important measures for regulating density,which improves stand’s stability and gets economical income from thinning.The study provides scientifical basis for sand-fixation forest management of Pinus sylvestris var mongolica plantation.更多还原