Abstract: Development of wine grape industry by refinement has put forward higher requirements for the suitability regionalization. In this paper, combining the methods of assembled superiority and GIS technology, the ecological suitability regionalization of wine grape with different ripening dates were studied with overall consideration of climatic and soil conditions in Ningxia. The results showed that the wine grape could be planted in most of central and northern parts of Ning-xia. Climatic suitable regions for early maturing varieties distributed mainly in the transitional areas between central and northern parts, that for medium maturing varieties located in most of south regions of Yinchuan, and that for late maturing varieties distributed in Yinchuan and most of north areas of Yinchuan. The areas of climatic suitable regions for early, medium and late maturing varieties were 16100, 8500 and 9697 km², while those of the most ecologically suitable regions for early, medium and late maturing varieties were 730, 270 and 38.4 km², respectively. The most ecologically suitable regions were mainly concentrated in the east side of Helan Mountain that was 30 km away from the west of Yinchuan, Dove Mountain and Niushou Mountain in Qingtongxia City, the northern mountain in Zhongning City, and the northern mountains in Shizuishan. The results of this study could provide a basis for utilization of regional advantages of ecological resources during the industrial development of wine grape in Ningxia.

Key words: winter wheat, light-response curves, tillage practices, grain yield, diurnal variation of photosynthesis