Abstract:Through study on the canopy temperature and some other traits of wheat for 10 years and more, the authors found that all of the wheat materials in any agro-ecological zone could be divided into three microclimate ecological types based on their canopy temperature (plant temperature), that was, cold, intermediate and warm types. The canopy temperature of cold type wheat was equivalent to or continuous lower than that of the control and its metabolic function, premature senility resistance and vitality were b...