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Risk evaluation and regionalization of cold and freezing damage on guava introduction in Fujian Province.

CHEN Jia-jin1**, WANG Jia-yi1, HUANG Chuan-rong1, LIN Qi-ming2, WU Ting-jie1   

  1. (1Fujian Meteorological Service Center, Fuzhou 350001, China; 2Lianjiang Meteorology Bureau, Lianjiang 350500, Fujian, China)
  • Online:2015-04-10 Published:2015-04-10

Abstract:

Based on the disaster risk system analysis theory and disaster risk index method, the cold and freezing hazard, the vulnerability of riskbearing object, and the prevention capacity for cold and freezing damage of guava were analyzed by using the yearly meteorological data, planting areas, yield, and socioeconomic data in Fujian Province. The comprehensive risk evaluation index was calculated by using comprehensive weighted method, and the regionalization of cold and freezing damage was done in guava introduction regions by GIS. The results show that the regions of high hazard value of cold and freezing damage are distributed in Longyan City, the mountainous areas of western Zhangzhou and Quanzhou cities, northwestern Putian City, western Fuzhou City and the most areas of Ningde City. High vulnerability value of guava is distributed in Pinghe County. Low prevention capacity value of cold and freezing damage is distributed in some counties of eastern Fujian Province. The cold and freezing damage risk of guava introduction can be divided into four levels (mild, moderate, severe and violent) in Fujian Province by considering the comprehensive risk degree. The severe and violent risk regions are distributed in Longyan City, the mountainous areas of western Zhangzhou City, high elevation areas of Quanzhou and Putian cities, the inland mountainous areas of Fuzhou City, and the most areas of Ningde City.
 

Key words: invasion duration, nutrient element, ecological stoichiometry, Cyperus malaccensis