This paper focused on the nutrient and enzyme of phloem in different attacking stages host trees, Pinus armandi, in pine ecosystem of Qinling Mountains.

• 摘要对秦岭林区遭受华山松大小蠹危害不同阶段的被害华山松韧皮部内的营养物质含量和酶活性变化进行了测定。