Agricultural Climate Risk Regionalization of Wheat Stripe Rust in Winter-reproductive in Sichuan

This paper summarizes the research results of relation ships between the wheat stripe rust in winter-reproductive and climatic environmental conditions,and analyzes Zitong County which is often prone area in the basin.On this basis,this paper divides respectively the wheat stripe rust meteorological condition into three class indexes,such as more suitable class,suitable class and unsuitable class in the winter.The wheat stripe rust agricultural climate risk model is developed by using risk analysis and hierarchical analysis methods.Two environmental factors are considered in risk model,including the occurrence frequency of meteorological condition which is more suitable and suitable for the wheat stripe rust development and the number of host(for example,the plant proportion).Subsequently,the risk degree and the risk classes are determined clearly.Then the risk indexes are divided into three grades: the high,the medium and the low.The Agricultural climate risk regionalization of wheat stripe rust in winter-reproductive in Sichuan is studied,by using the GIS techniques.The results indicate that platean of the west of Sichuan plateau and the mountain of southwest of Sichuan are a low-risk or totally safe areas.In addition,Sichuan basin is divided into medium or high risk area.Among them,high-risk areas are mainly concentrated in the central region of the basin.