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为了探究苜蓿小光壳叶斑病的发病规律及其与各种气象因子的相关性,笔者基于黑龙江垦区各气象站2014年7月份的气象资料,以及各苜蓿种植基地小光壳叶斑病的发病数据统计,采用相关分析方法,从气温、地面温度、降雨量、相对湿度以及风速等角度研究了气候变化背景下各气象要素变化对黑龙江省苜蓿小光壳叶斑病病害发生的影响。结果表明:小光壳叶斑病在黑龙江省各地均有较高的发病率,其中佳木斯的小光壳叶斑病的病情指数最高,达53.46;在适宜的温度下苜蓿小光壳叶斑病的发病率与温度呈显著负相关(P<0.05),而与湿度呈不显著正相关;其与地面温度、最大风速及降雨量均无显著相关性。
In order to explore the incidence of alfalfa leaf spot disease and its relationship with various meteorological factors, the author based on the meteorological data of various weather stations in July, 2014 in Heilongjiang Reclamation Area, Incidence and temperature, rainfall, relative humidity and wind speed were used to study the influence of meteorological factors on the occurrence of leaf spot disease of alfalfa leaf litter in Heilongjiang Province from the aspects of temperature, ground temperature, rainfall, relative humidity and wind speed. The results showed that the incidence of leaf spot leaf spot was higher in Heilongjiang Province, and the disease index of leaf spot leaf spot of Jiamusi was the highest (53.46). At the optimum temperature, leaf spot of alfalfa leaf spot disease There was a significant negative correlation between the incidence and temperature (P <0.05), but not significant positive correlation with humidity. There was no significant correlation between the incidence and ground temperature, maximum wind speed and rainfall.