Ecological suitability evaluation of cigar planting in Yishui based on fuzzy clustering

Screening suitable areas for cigar planting and production through ecological adaptability evaluation is a prerequisite for improving the yield and quality of cigar raw materials and promoting the development of cigar industry. Taking Yishui Cigar Estate in Shandong Province as an example, using important climate indicators such as average temperature during the growth period, temperature difference between day and night, active accumulated temperature of ≥10 ℃ during the growth period, relative humidity during the growth period, rainfall during the growth period and average daily sunshine hours during the growth period, fuzzy clustering was carried out on 11 high-quality cigar tobacco areas at home and abroad, including Havana, Binard de Río and Shifang, and the corresponding CFI values of each region were obtained through the membership function. The fuzzy clustering results showed that 11 regions could be divided into 4 categories, among which the climatic conditions of Yishui were similar to those of Havana, Pinar de Río, Dominica, Bahia, Shifang and other high-quality cigar growing areas at home and abroad, and their climate suitability index CFI values were 0.931, 0.963, 0.956, 0.944, 0.932 and 0.892, respectively, especially Yishui and Dominica’s CFI index was the most similar. It is concluded that Yishui Cigar Estate has the ecological and climatic conditions for growing high-quality cigars.