Climatic ecological division and growth characters of wheat in Henan Provice

12 factors that affect the wheat productive tiller number ratio,kernel number per spike,thousand-grain weight at eight typical sites in Henan Province were analysed and calculated by fuzzy clustering method.Henan Province is divided into four types of area at λ=0.857.which are south,north,middel-south and middel-north of Henan,respectively.The distribution principles of wheat varieties and characteristics of the growth and main measures for high yield in their climatic ecological regions were discussed.