Abstract:

In order to use climate resources effectively and pursure the interests while avoiding disadvantages, planning and development southern Shaanxi citrus industry reasonably, in this paper, on the basis of disaster survey of southern Shaanxi citrus cold damage in winter 2010, the author analyzed the climatic background of citrus cold damage in winter 2010, and combined the citrus cold damage indicators overwintering stage and harmful accumulated cold over the cold wave, analyzed and verified the southern Shaanxi citrus cold damage level indicators, and put forward the southern Shaanxi citrus cold damage level indicators which divided by using the harmful accumulated cold over the cold wave. On the analysis of the extreme minimum temperature and the harmful accumulated cold over the cold wave in wintering 2010 and in historical years of 12 citrus planting county in Ankang Region and Hanzhong Region, the author discussed the reason that southern Shaanxi citrus cold damage over wintering stage in western was graver than in eastern, and the analysis results were matched the truth basically, finally put forward the defensive countermeasures of citrus cold damage overwintering stage from several aspects.