Analysis on hazard risk of late frost for wine grape in the east foot area of Helan Mountain in Ningxia
Journal Title: 广东农业科学 - Year 2018, Vol 45, Issue 5
Abstract
"Based on the April-May daily minimum temperature data with nine weather stations in the east foot area of Helan Mountain in Ningxia during 1961—2015. The number of days ，frequency changes and hazard risk of late frost for wine grape are researched from the perspective of climate disaster，that using mathematical statistics and GIS spatial analysis.The results show that the days of late frost are between 78—233d in recent 55 years. The number of light frost is significantly more than that of medium frost and heavy frost，the change in time shows a decreasing trend. The rate of decline is greater than that of medium frost and heavy frost.The frost frequency showed the rule of decreasing radiation from north to south except for Dawukou in the north . The place where frost frequency of each grade is greatest in Taole，least in Dawukou，the trend declined with the change of years. The frost frequency in the other stations showed two or three jumps in the descending process in addition to the continued decline of Huinong. The hazard risk of each station is mostly moderate to low level and getting smaller，the medium and low range is obviously increasing with climate change. As of 2015，the areas of high-risk have largely disappeared，and the areas of secondary and medium risk have also been greatly reduced."
Authors and Affiliations
Wen-jun YANG, Hong-ying LI
Keywords
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- EP ID EP599410
- DOI 10.16768/j.issn.1004-874X.2018.05.021
- Views 155
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