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本试验在病区早晚造稻瘟病流行季节,每天对田间稻瘟病菌孢子密度、附着胞形成率以及稻苗自然接种的感染数量进行了观察。同时还观察了温湿度、雨量和叶面湿润时间(露时和雨时)等气象因素,分析了这些气象因素对它们的影响,找出了具体的数量变化规律,建立了回归方程。回归关系均显著,有一定的概括性。叶面湿润时间用自制的泰勒(Taylor)露水计测定。此露水计有较高的灵敏度。用露水计观测水滴消长来分析田间自然条件下稻瘟病的流行,是极有参考价值的新手段。
The test in the ward sooner or later make the blast season epidemic, the daily field spores density, the formation rate of appressoria and the amount of natural inoculation of rice seedlings were observed. At the same time, meteorological factors such as temperature and humidity, rainfall and leaf wetting time (exposed and rainy) were also observed. The influence of these meteorological factors on them was analyzed. The law of quantitative change was found and the regression equation was established. Regression relations are significant, there is some generality. Leaf wetting time was measured using a homemade Taylor dewometer. This dewometer has a high sensitivity. It is a very valuable reference to analyze the prevalence of rice blast under the natural conditions in the field by observing the drop of water drop with the dew point meter.