Abstract:

The aims are to study the climatic suitability of Yunnan early-maturing table grape planting, make full use of climate resources, and find out the suitable planting area for early-maturing table grape. Based on the observation data collected from 125 weather stations in Yunnan between 1981 and 2010, and combined with the climatic conditions needed for precocity of table grape, 3 indicators were screened out, i.e., ≥10℃ active accumulated temperature in May, ≥10℃ active accumulated temperature from January to May and precipitation from April to May. GIS technology was used to divide climate suitability zones precisely for planting early-maturing table grape in Yunnan. The results showed that the most suitable areas covered 1.9% of the entire province, mostly in the dry-hot valley, e.g., Yuanmou, southeastern Yongren, and southern Shuangbai in Chuxiong Prefecture, Binchuan Dam Area in Dali Prefecture, eastern Huaping as well as central and southern Yongsheng in Lijiang City, western Changning in Baoshan City, part of Liuku in Nujiang Prefecture, etc. Moreover, the suitable areas accounted for 8.9%, mostly in northern Honghe, southern Chuxiong, southeastern Kunming, Yuxi, northern Pu'er, southern Dali, eastern Lincang, northern Zhaotong, eastern Baoshan, and so on. Lastly, the semi-suitable and unsuitable areas occupied 27.3% and 61.9% respectively. In this study, Yunnan was zoned into 4 climatic areas for early-maturing table grape planting. Each of the climatic areas was assessed, and corresponding suggestions were put forward for the regional planting of early-maturing table grape and the development of grape industry in Yunnan.

Key words: Yunnan, early-maturing table grape, GIS, suitability, climate regionalization