在对相同条件下的华山松纯林和混交林各主要生态因子及主要病虫害调查研究的基础上 ,以系统论思想为先导 ,结合生态学、生物学和森林保护学的理论 ,对调查结果进行了系统分析 ,得出 :华山松纯林树种单一 ,而华山松混交林树种复杂且林下植被较华山松纯林丰富 ,因此 ,引起各自系统内温度、湿度、土壤性状、动植物分布、昆虫种类等生态因子变化 .纯林与混交林生态效应发生显著差异 ,混交林较纯林的生态效应优异 Based on the investigation of major ecological factors and major diseases and pests of Pinus armandi and mixed forest under the same conditions, the author takes the theory of system as the guide and combines the theories of ecology, biology and forest protection to make the investigation result The results showed that the species of Pinus armandii was single, while the species of Pinus armandii was complex and the plantation under Pinus armandii was rich in pure forest of Pinus armandii. Therefore, the temperature, humidity, soil character, distribution of plants and animals, Species and other ecological factors changes.The pure forest and mixed forest ecological effects were significantly different, mixed forest more pure forest ecological effect is excellent