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樟子松是近年来在北方发展起来的重要用材林造林树种。樟子松不仅具有较强的适应性,而且还可以提供优质的木材。因此受到北方人们的普遍重视。现在在北方人工林中,已有大批樟子松达到了抚育间伐的年龄,急需营林抚育阶段经营理论的指导。因而笔者试图通过胸径与冠幅的相关关系,确定樟子松人工林在各龄级阶段的保留密度,以期对樟子松人工林的抚育间伐有所帮助。
Pinus sylvestris is an important afforestation tree species developed in northern China in recent years. Pinus sylvestris not only has strong adaptability, but also can provide high-quality wood. So by the people of the north generally. Now in the northern plantation, a large number of Pinus sylvestris has reached the age of tending and thinning, and is urgently in need of guidance in the management of the tending stage of the forest. Therefore, the author tried to determine the reserve density of Pinus sylvestris plantation at different stages of age by the correlation between DBH and crown width in the hope of helping the Pinus sylvestris plantation.