基于GIS的中国小麦条锈病菌越夏区气候区划

 基于多年的气象数据(1980~2001年),首次从制约小麦条锈病菌越夏的温度因子入手,结合寄主小麦因素,利用地理信息系统(Geographical Information System,GIS),对我国小麦条锈病菌越夏区进行较详细的气候区划。本研究从温度条件上明确了全国适合小麦条锈病菌越夏的范围。研究表明,在我国小麦种植区适合小麦条锈病菌越夏的范围很广。其中甘肃、四川、云南、陕西境内适合越夏的地区是连成一片的,甘肃东部除了西边的几个县外其它地方7、8月份最高一旬均温在20~23℃,条锈病菌越夏困难;西藏、青海境内的小麦种植区几乎都适合小麦条锈病菌越夏;贵州境内适合越夏的地区可能和云南越夏区是一个整体。云南适合越夏的地区甚广,且地形复杂,需要进一步调查研究。

Climate-based regional classification for oversummering of Puccinia striiformis in China with GIS

Temperature was a considerable factor to affect the oversummering process of the wheat stripe rust pathogen P.striiformis. The high-limit temperature for the pathogen oversummering combined with relevant wheat-growth information was used to classify the wheat-growing regions for the pathogen oversummering in China by using the Geographic Information System (GIS). The study demonstrated that the regions suitable to the pathogen oversummering in China are huge. The pathogen-oversummering regions in Gansu, Sichun, Yunnan and Shaaxi Provinces are conjunct. The maximum temperature in July and August was between 20 and 23℃ in most parts of eastern Gansu Province with exception in some counties, and the possibility of pathogen oversummering in these regions is low. The most wheat-growing regions in Tibet and Qinghai Province are suitable to pathogen oversummering. The regions suitable to pathogen oversummering in Guizhou Province are most likely conjunct with those in Yunnan Province to serve as an integrated area for pathogen oversummering. However, regions in Yunnan Province are geographically complicated, and feature of pathogen oversummering is still under investigation.