摘要
2003年我国稻纵卷叶螟的灾变造成了水稻的明显减产。本文以GIS为平台,对2003年我国稻纵卷叶螟发生的大气环流背景进行了研究。结果表明:(1)2003年我国稻纵卷叶螟发生情况特重。(2)850 hPa大气环流形势对稻纵卷叶螟的迁飞和降落有重要的宏观调控作用。(3)850 hPa风场上的盛行偏南风对稻纵卷叶螟北迁有利,925 hPa风场上的盛行偏北风对南迁有利,这两个高度上的风向反气旋式切变对害虫迁入和降落十分有利。(4)迁飞路径上的降水对稻纵卷叶螟的降落有迫降作用,但南迁过程中降水作用明显小于北迁。
In 2003, the catastrophic occurrence of the rice leaf rollers （ Cnaphalocris medinalis Guenee） took evident lost to the rice production in China. In this paper, GIS was selected as a support basis and the atmospheric circulation backgrounds of the rice leaf rollers occurred in 2003 were analyzed. The researches results followed as： （ 1 ） In 2003, the occurrence of the rice leaf rollers in China was very serious. （2）The current situation of atmospheric general circulation on 850hPa isobaric surface played important transferring and controlling parts on the migrations and landings of the rice leaf rollers. （3） The prevailing deflected-northward wind was favorable to the migrations northward of rice leaf rollers and the deflected-southward wind was advantageous to the migrations southward. The regions with anticyclonic curvatures were beneficial to the immigrating and landing. （4）The rainfall on the migrating paths of the rice leaf rollers played a crash role in the intensive landings of the pest and the effects of this role in the processes of migration southward were less than the effects in the migration northward.
出处
《气象科学》
CSCD
北大核心
2008年第2期184-189,共6页
Journal of the Meteorological Sciences
基金
国家自然科学基金项目(30671340)
关键词
稻纵卷叶螟
GIS
大气背景
Rice leaf rollers Geographic information system Atmospheric background
