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本文运用数量化理论 I将定性因子定量化后 ,利用通径分析方法对影响华山松大小蠹虫情指数的 1 5个因子进行分析 ,结果表明对虫情指数直接影响作用最大的是绝对湿度 ,间接影响最大的是海拔因子。详细地揭示了各影响因子的作用历程 ;建立了多元回归分析模型以达到对危害程度的预测 ;用虫情指数能更合理地反映真实的危害规律
After quantifying the qualitative factors by using quantitative theory I, the path analysis method was used to analyze 15 factors affecting the pest index of P. bungeana. The results showed that the absolute direct impact on insect index was absolute humidity, indirect The most influential factor is altitude. Detailedly reveals the course of the impact of various factors; established a multiple regression analysis model in order to achieve the prediction of the degree of harm; insect index can be more reasonable to reflect the real hazard law