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通过樟子松枯梢病调查和病害流行相关性分析的结果 ,明确了樟子松枯梢病的发生与寄主和环境条件的关系 ,确定了病害发生的主要影响因子 :即寄主感病性、林龄、造林密度、坡向、坡位及林位。结果表明 :樟子松易感病 ,林龄大发病重 ,阳坡比阴坡发病重 ,密度大的比密度小的发病重 ,上坡、中坡、下坡发病程度由重到轻 ,林缘比林内重。随着平均温度、相对湿度和降雨量的增加 ,孢子飞散量增加。种子不带菌 ,该病的传播与种子无关。将2 0 0 0年和 2 0 0 2年生长季节樟子松枯梢病病情逐月调查的数据 ,分别进行指数、韦布尔和理查德 3种曲线的非线性回归分析 ,结果病情随时间的进展曲线以韦布尔曲线为最优。同时 ,也说明了樟子松枯梢病属于多循环的复利病害 ,因此 ,在病害预测和防治上也应采取相应的策略和方法。
According to the results of the correlation analysis between the investigation and the epidemic of Pinus sylvestris var. Mongolica, the relationship between the occurrence of the Pinus sylvestris var. Mongolica and host and environmental conditions was clarified, and the main influencing factors of the disease were determined: host susceptibility, Forest age, afforestation density, aspect, slope position and forest position. The results showed that Pinus sylvestris var. Mongolica was susceptible to the disease and had a long age. The positive incidence of the sunny slope was heavier than that of the negative slope, and the density was lower than that of the negative slope. The incidence of uphill, middle slope and downhill was heavier and lighter. Edge than the heavy Lin. With the increase of average temperature, relative humidity and rainfall, spore scatter increased. Seeds do not carry the disease, the disease has nothing to do with the seed. Non-linear regression analysis of the three curves of index, Weibull and Richard in the growth season of 2001-2002 and the growth season of Pinus sylvestris var.mongolica were carried out. As a result, The curve of progress is Weibull curve is the best. At the same time, it also shows that Pinus sylvestris var.mongolica belongs to multi-cycle compound disease, therefore, corresponding strategies and methods should also be taken in disease prediction and prevention.