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2014和2015两年度利用Burkard定容式孢子捕捉器监测了高感小麦白粉病品种京双16种植区和中感品种众麦2号种植区田间空气中的病菌孢子浓度变化动态,同时利用小型气象站监测了田间的气象因子,通过分析京双16和众麦2号种植区空气中孢子浓度与空气温度、湿度、降雨、风速和太阳辐射率的相关性,发现空气中的孢子浓度主要与空气温度呈显著的正相关性(r>0.348 3,P<0.05)。在此基础上,分别分析了田间病情与调查日期前累积孢子浓度、一周前累积孢子浓度、前一周累积孢子浓度和当周累积孢子浓度的关系,结果表明,中感品种众麦2号田间病情与累积孢子浓度的关系均呈指数关系,其中田间病情与调查日期前累积孢子浓度或一周前累积孢子浓度的拟合效果最好,而感病品种京双16的田间病情与累积孢子浓度多呈对数关系,其中病情指数与一周前累积孢子浓度的拟合效果最好。
In 2014 and 2015, the dynamic changes of bacteria spore concentration in field air of high susceptible wheat powdery mildew Jingjishuang 16 and middle sensitive wheat Zhongzhongmai 2 were monitored by Burkard's volumetric spore catcher. In the meantime, The station monitored the meteorological factors in the field. By analyzing the correlation between the spore concentration in air and the air temperature, humidity, rainfall, wind speed and solar emissivity in Jingshuang 16 and Zhongmai 2, it was found that the spore concentration in air was mainly related to the air The temperature showed a significant positive correlation (r> 0.348 3, P <0.05). On this basis, the relationship between accumulated disease concentration and accumulated spore concentration before the survey date, cumulative spore concentration a week ago, accumulated spore concentration in the previous week and cumulative spore concentration in the previous week were analyzed. The results showed that the field susceptibility variety Zhongmai 2 And the cumulative spore concentration showed an exponential relationship, of which the field condition and the survey before the cumulative spore concentration or cumulative spore concentration of the best one week before the fit, and the susceptible variety Jingshuang 16 field conditions and cumulative spore concentrations were mostly Logarithmic relationship, in which the condition index and the cumulative spore concentration before a week fit the best.