Abstract: Ecological experiments on wheat in sowing stages of spring were arranged on Shijiazhuang,Yulin, Yinchuan and Zhangye during 1983—1985.These locations have similar latitudes, but their longitudes and elevations are very different. Mianyang 11 is a spring wheat. Its growth period from sowing to maturation for the experimental wheat variety has apparent difference between different locations. Experimental results showed that average day air temperature in growth period of wheat could decrease for about 0.3℃ and the growth period could be increased by 2 or 3 days with every 100 metre increment in elevation has go up. On the other hand, this period of growth could be reduced for about two days with one degree decrease in longitude in the range between 38˚N and 39˚N in China.