关键词: 鲜食葡萄, 环渤海地区, 作物水分亏缺指数, 干旱风险

Abstract: The influence of water on the growth and development of grapes cannot be ignored. In order to provide a theoretical reference for drought risk management and loss reduction and quality assurance of table grapes, the Bohai Rim region was taken as a study area. The crop water deficit index, which was calculated using daily meteorological data from 60 meteorological stations in the region from 1981 to 2014, was taken as an index to explore the drought of table grapes. By the crop water deficit index of the table grapes in each growth period in the region, the drought frequency and station ratio of the table grapes in each growth period were obtained. Then we evaluated the risk of drought based on the spatial and temporal distribution of table grapes in the region. The results showed that the matching degree was low in the time dimension between the water requirement of table grapes in the Bohai Rim region and precipitation, and table grapes in the region had a certain risk of drought in each growth stage. The new shoot growth period and fruit ripe period of table grapes were high-risk periods of drought in the region, when droughts were more frequently and more severely to occur. The central and southern part of Hebei province were high-risk area for drought, and where the risk of severe droughts is higher for table grapes. Table grapes in the Bohai Rim region had the most widely range of drought during the ripening period.

Key words: Table grapes, Bohai Rim region, Crop water deficit index, Drought risk