Study on Eco-climate Applicability of Spring Wheat for Condign Planting Division in Gansu Province

Based on Meteorological data, such as 10-day average temperature, sunlight times, precipitation, accumulated temperature (≥0℃), altitude above the sea level and etc, a integrated contribution index and a function of eco-climate applicability for spring wheat are established. Results show that the applicability of spring wheat to altitude is between 0.15-0.85 with minimum values in Dingxi and Gulang, maximum values in Jinta and Dunhuang; the applicability to accumulated temperature (≥0℃) has the same tendency with altitude; applicability to 10-day average temperature is with 0.35-0.58, which indicates the temperature is suitable to the spring wheat growing. Afterwards, by the way of integral regression, the contributive coefficients in different climate regions and growth phases are analyzed for spring wheat. It suggests that the average contribution coefficients of sunlight, temperature and water has maximum values at moderate plain, oasis irrigated area; medium values at warm desert oasis irrigated area; and minimum values at cold hill half-irrigated area. The influence and relying of spring wheat of ceo-climate applicability is studied too. Finally, the integrated division index of eco-climate is confirmed, the planting division of climate applicability is divided into 5 grades. Also, a effective approach of exploiting and developing the eco-climate resources is proposed。