Abstract: Based on the meteorological data during the growing season of winter wheat in 78 weather stations in 1971-2000 and geographical information of Anhui province, the different eco climate suitable planting area of winter wheat varieties were analyzed and divided. The zoning index system was constructed by selecting main meteorological factors affecting the distribution and growth of winter wheat varieties. The digital maps of the zoning factors were formed by applying regression analysis combined with spatial grid interpolation. By two levels indices of the temperature factor and precipitation ones, the distribution maps of the ecoclimate suitable planting areas of winter wheat with the scale of kilometer per grid were formed, and then covered with farmland digital mask, the zoning map of winter wheat with farmland meaning in Anhui province was finally established. The results showed that the ecoclimate suitability of winter wheat could divide into five regions and 11 subregions, which well reflects the distribution characteristics of the ecoclimate suitability on winter wheat varieties and difference in temperature suitability and precipitation ones for each region. The winter hardiness degree of the winter wheat varieties weakened from the northern area to the southern area because the difference of winter temperature among northern and southern areas. The main problem of winter wheat production in Anhui province is water imbalances. Water is deficient in the northern area, while too much in the southern area, so the stable and high crop yield were restricted. According to the zoning result the measures should be taken to increase the ability of drought resistance in the northern areas of winter wheat production area, the planting area of winter wheat with semi winter varieties in the area along the Huaihe river and northern of the Jianghuai hill should be extended, and planting area of winter wheat in the southern area of Anhui province was suggested to reduced so as to improve the winter wheat planting level.

Key words: Winter wheat varieties, Ecoclimate, Suitability, Zoning