基于GIS稻飞虱种群变化时空分析

Spatio-temporal analysis of planthoppers population based on GIS

稻飞虱作为水稻的主要害虫,严重的影响水稻生产。尽管采取了各种防治措施,但效果不明显。为提高稻飞虱的预测预报水平,应了解稻飞虱的时空变化规律。根据2006年广东省稻飞虱监测数据,采用基于GIS的多因子插值模型生成不同时期的稻飞虱空间危害专题图,从时间和空间角度分析比较不同时期的稻飞虱危害情况,发现稻飞虱在广东省内有明显的空间结构,即稻飞虱发生程度不仅与空间位置有关,而且其扩散具有方向性,客观地揭示了稻飞虱在广东省的时空传播规律,为科学防治稻飞虱提供了客观的依据,也为其他农作物病虫害的研究提供了方法参考。

Planthoppers, as one of the most widespread and destructive rice pests, greatly affect the rice yield. Although various control measures have been taken, the overall effect in predicting the outbreak pattern and minimizing the damage is not significant. To improve the level of forecast, it is necessary to have a good understanding of spatio-temporal change of planthoppers. The multi-factor spatial interpolation model based on Geographic information system （GIS） was used to make the thematic map of spatial planthoppers distributions in Guangdong province according to the monitoring data in 2008. Comparing the thematic maps in different time periods, it is clear that the population of planthoppers has a spatio-temporal characteristic, which is not only related to space location, but also has a certain direction when spreading. The result reported here offers help to prevention and control of planthoppers in Guangdong province, as well as to provide a good reference for studies of other pests.