Abstract:

Based on data from 17 observatory stations of Guannan grape planting area in Lianyungang from 2008 to 2017, including the ten-day, monthly and yearly temperature, precipitation and sunshine, we used GIS to convert 1:250000 basic geographical background data of Lianyungang into a high-resolution (100 m×100 m) digital terrain model. By adopting geographic information system and analytic hierarchy process, we combined the climatic conditions with meteorological disasters and preventive measures during the growth period of grape, and obtained the zoning index of grape climate suitability. The results showed that the temperature during the budding period of the grapes in April, and precipitation during flowering period in May, and rainfall value during fruit ripening in August could be selected as the research indexes of climatic suitability, and scored by experts, their weight coefficients were 0.4, 0.4 and 0.2 respectively. These indexes were divided into 3 levels: suitable, sub-suitable and unsuitable, to determine the climatic and ecological conditions for commercial grape cultivation. The results show that the most suitable climatic areas for grape cultivation are in central and northern Guannan, including Zhangdian, Beichenji and Sankou; the sub-suitable areas are Mengxingzhuang, Tanggou and Liji; the unsuitable areas are in southern and eastern Guannan, such as part of Xinji, Xin’an, Huayuan, Bailu, and etc. This research method could provide reference for the safe layout of various cash crops in Lianyungang.

Key words: climatic regionalization, geographic information system, analytical hierarchy process, grape, climate suitability index