【摘要】 对福建、江西等地227块松树枯梢病的林分病情标准地进行调查。结果表明:病害的发生与林分及立地因子关系密切。由上杭、连城、永新和安福4县有代表性的49块样地推导出了松树枯梢病的病情指数与林龄、造林密度、郁闭度、土壤质地、土壤湿度、坡位、坡向的生态数学模型:y=41·38 -16·56x11+5·08x21+18·62x31-3·78x41+19·94x51+7·32x61+4·27x62-4·06x71-10·56x72-13·88x73,其偏相关系数分别为0·606 9、0·612 5、0·268 9、0·1789、0·681 1、0·279 0、0·473 7。该模型模内判别准确率为79·59 %,其中病情指数与土壤湿度、郁闭度、林龄和坡位间关系紧密,在0·01水平上显著,它们是松树枯梢病在我国南方发生的主要诱导因子。提出以营林措施为主的生态控制技术。更多还原

【Abstract】 The data analysis of 277 plots in forest farms in southern China indicated the development of Sphaeropsis sapinea is affected by stand and site factors. The ecological model of the shoot blight of S. sapinea was established as follows: y=41.38-16.56x_ 11 +5.08x_ 21 +18.62x_ 31 -3.78x_ 41 +19.94x_ 51 +7.32x_ 61 +4.27x_ 62 -4.06x_ 71 -10.56x_ 72 -13.88x_ 73 . In this formula y represents forest disease index and x_ 11 ～x_ 73 represent ecological factors (levels). The partial correlations between the disease index and soil moisture, stand canopy density, stand age and slope lever are significant at P<0.01, and they are the main inducing factors of incidence of S. sapinea in the south of China. Suggestions and measures of ecological control by afforestation were proposed.更多还原