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在华山松有害生物生态系统中 ,华山松疱锈病和华山松球蚜往往是同时发生的 ,它们间有着复杂的互作关系 ,如果应用单目标对象的防治指标 ,常常会顾此失彼 ,出现材积损失率超出经济损害水平的危险。为避免这种情况的发生 ,本文就昆明市东川区二百二林场华山松疱锈病和华山松球蚜对华山松的复合危害情况进行了调查研究。结果表明 ,华山松疱锈病危害级代表值和华山松球蚜危害级代表值与华山松材积损失率间有明显的相关关系 ,它们间的这种关系可用多元回归方程表示为 :Y =1 0 .574 +8.1 1 3 2 4X1+7.0 1 964X2 (X1—华山松疱锈病危害级代表值 ,X2 —华山松球蚜危害级代表值 )。并在此基础上 ,考虑了不同的立木生长量、木材价格、防治费用和防治效果 ,进一步建立了华山松华山松疱锈病和华山松球蚜复合防治指标的动态模型8.1 1 3 2 4X1+7.0 1 964X2 =[C/(D×J×E) ]× 1 0 0 -1 0 .574 (C—防治费用 ,D—对照单位面积的材积 ,J—木材价格 ,E—防治效果 )。该模型为华山松主要病虫害综合治理提供了极为重要的理论依据
In Pinus armandi pest ecosystem, Pinus armandii rust and Pinus armandii are often occurred simultaneously, and they have complicated interactions. If single-target control index is applied, it often leads to the loss of volume rate Exceeding the risk of economic damage. In order to avoid this situation, this paper investigated the complex hazards of Pinus armandii rust and Huashan pine aphid on Pinus armandii in Erdhonglin Farm, Dongchuan District, Kunming. The results showed that the representative values of Pinus tabulaeformis rust grade and Pinus armandii Hazard damage grade had a significant correlation with the loss of Pinus armandi, and the relationship between them could be expressed as multivariate regression equation: Y = 10 .574 +8.1 1 3 2 4X1 + 7.0 1 964X2 (X1 - Representative value of Pinus armandii rust blight grade, X2 - Representative value of Pinus armandii Aphid hazard grade). On this basis, the dynamic model 8.11 3 2 4X1 + 7.0 of Pinus armandii, Pinus armandii and Pinus armandii was further established by considering the different stand growth, timber price, prevention and control costs and the control effect. 1 964X2 = [C / (D × J × E)] × 1 0 0 -1 0 .574 (C-control cost, D-volume per unit area, J-timber price, E-control effect). The model provided an extremely important theoretical basis for the comprehensive management of major pests and diseases of Pinus armandii