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为明确大豆菌核病发生发展中各个时期气象因子的重要性及相关性,对黑龙江省大豆主产区中9个地点的大豆田菌核病病情指数进行调查,收集各地6～8月的平均降水量、平均日照时数和平均气温,在此基础上采用多元回归分析的方法建立回归方程,然后利用通径分析确定影响菌核病发生的主要气象因子。结果表明:8月份平均降水量对大豆菌核病病情指数的影响最为严重,其次为7月份平均日照时数和8月份平均温度;7月份平均日照时数是通过与8月份平均降水量相互作用对大豆菌核病的病情指数产生较大影响。其它因子的直接间接通径系数都很低,对菌核病病情指数的影响不大。因此,在7月份的平均日照时数少,8月份平均降雨量大,并且8月份平均温度适宜的情况下菌核病将发生流行。
In order to clarify the importance and correlation of meteorological factors during the development and development of soybean sclerotinia, the disease index of soybean scab in nine soybean growing areas in Heilongjiang Province was investigated, and the average precipitation from June to August The average sunshine hours and the average temperature. On this basis, multiple regression analysis was used to establish the regression equation, and then the path analysis was used to determine the main meteorological factors affecting the occurrence of Sclerotinia scab. The results showed that the average precipitation in August had the most serious effect on the disease index of S. sclerotiorum, followed by the average sunshine hours in July and the average temperature in August. The average sunshine hours in July was affected by the interaction with the average precipitation in August The disease index of soybean scab had a greater impact. The direct indirect path coefficients of other factors were very low, and had little effect on the disease index of sclerotinia. As a result, Sclerotinia will prevail when the average number of sunshine hours in July is low, the average rainfall in August is large, and the average temperature in August is appropriate.