环境因素对谷子白发病的影响相关性研究  

Correlation between Environmental Factors and Downy Mildew of Foxtail Millet

作　　者：李瑞 龚增利 叶彩萍[2] 白伟 赵艳群[2] 梁鸡保 LI Rui;GONG Zengli;YE Caiping;BAI Wei;ZHAO Yanqun;LIANG Jibao(Shenmu County Agricultural Technology Extension Center,Shenmu,Shaanxi 719300,China;Yulin County Agricultural Technology Service Center,Yulin,Shaanxi 719000,China)

机构地区：[1]神木市农业技术推广中心,陕西神木719300 [2]榆林市农业技术服务中心,陕西榆林719000

出　　处：《陕西农业科学》2023年第6期95-97,共3页Shaanxi Journal of Agricultural Sciences

基　　金：国家谷子高粱产业技术体系(CARS-07-13.5-A9);农业部现代农业产业技术体系(CARS-07-12.5-A9)。

摘　　要：通过对近5 a榆林地区不同县区谷子种植出苗期(5月份)降雨量、5 cm平均地温、茬口等条件下白发病发病率进行统计分析,研究结果表明,谷子白发病与5月份降雨、地温相关性显著,随着雨温系数降低,谷子白发病发病率均明显增加,三地中雨温系数最高2.57降为0.51时,白发病发病率由4%增长至28%。正茬田块白发病发病率明显低于重茬田、迎茬田的白发病发病率,仅为0~6%,重茬田高达51.95%。This study aimed to investigate the correlation between environmental factors and downy mildew in foxtail millet.The incidence of downy mildew incidence in different counties and districts in Yulin over the past five years was statistically analyzed under the conditions of millet planting and emergence period(May).The result showed that incidence of downy mildew of millet was significantly correlated with the rainfall and ground temperature in May.As the rain temperature coefficient decreased,the incidence of millet downy mildew increased significantly.For instance,when the highest rain temperature coefficient in the three places decreased to 0.51,the incidence of downy mildew increased from 4%to 28%.Moreover,the incidence of downy mildew in stubble fields was significantly lower than that in heavy stubble fields and stubble fields,ranging only from 0%to 6%.Conversely,the incidence of downy mildew in heavy stubble fields was as high as 51.95%.These findings suggest that temperature and humidity play a crucial role in the incidence of downy mildew in foxtail millet,and proper crop rotation practices could effectively reduce the incidence of this disease.

关 键 词：谷子 白发病 温湿度 茬口 

分 类 号：S515[农业科学—作物学]