Climatic suitability of single-season rice and its changes in Anhui Province in latest 50 years

The temperature suitability, sunlight suitability, precipitation suitability model and climatic suitability model of single-season rice are set up by using Fuzzy mathematics theory and referring to former study, and the temperature suitability, sunlight suitability, precipitation suitability and climatic suitability of different growing periods have been calculated separated with the model and related data during 1960–2009 of Anhui Province. The results show that temperature suitability and sunlight suitability are relatively big, and precipitation suitability is small in Anhui Province. Climatic suitability and temperature suitability of single-season rice have decreasing trend, and the sunlight suitability has a downward trend.