2003年稻纵卷叶螟大发生的水汽条件分析  

Atmospheric water vapor conditions of Cnaphalocrocis medinalis outbreak in 2003.

作　　者：王翠花[1] 包云轩[1] 王建强[2] 翟保平[1] 向勇[3] 

机构地区：[1]南京农业大学农业部病虫监测与治理重点开放实验室,南京210095 [2]农业部全国农业技术推广服务中心,北京100081 [3]南京信息工程大学空间信息系,南京210044

出　　处：《应用生态学报》2006年第9期1693-1698,共6页Chinese Journal of Applied Ecology

基　　金：国家基础研究重点规划资助项目(2006CB102000).

摘　　要：为了弄清大气水汽环境对稻纵卷叶螟大发生的影响,在ArcGIS支持下,对2003年6月16日、7月21日和9月1日全国每667m2稻纵卷叶螟平均蛾量的地理分布进行空间分析,并选取对害虫迁入影响最大的850、925和1000hPa等压面上的大气相对湿度场和水汽通量场进行模拟和客观分析.结果表明,高空的水汽输送状况和相对湿度分布对稻纵卷叶螟的迁入具有很强的指示意义.在稻纵卷叶螟发生区域,从地面到850hPa,各层次空气相对湿度均达到50%以上.在稻纵卷叶螟迁飞过程中,迁入地空气相对湿度不断增大,源地的空气相对湿度不断减小.850hPa等压面是水汽输送的主要层次,也是稻纵卷叶螟迁飞的主要通道,该层的水汽输送方向与稻纵卷叶螟迁飞方向基本一致.To reveal the influence of atmospheric water vapor conditions on the outbreak of Cnaphalocrocis medinalis in 2003, the geographic distributions of the pest per 667 m^2 of China on June 16th, July 21st, and September 1st, 2003 were analyzed under the support of ArcGIS, and the air relative humidity and water vapor flux fields on 850,925 and 1 000 hPa that had the greatest influence on the pest immigration were selected to do simulation and objective analysis. The results showed that the transferring status of water vapor and the distribution of relative humidity on the upper air had significant indicative meanings for the immigration. In the regions of C. medinalis outbreak, the air relative humidity on each layer from the ground to 850 hPa was higher than 50%. The shorter the distance to the landing region of C. medinalis, the higher the humidity was, while the shorter the distance to the taking-off region, the lower this humidity was. 850 hPa was the main layer of water vapor transferring during C. medinalis migration, and the key pathway of the migration. On this height, the direction of water vapor transferring was basically concurrent with that of C. medinalis migration.

关 键 词：稻纵卷叶螟 空气相对湿度 水汽通量 迁飞 

分 类 号：S435.112.1[农业科学—农业昆虫与害虫防治]