关键词: 甘肃, 春小麦产量, 时空特征, 气候变暖, 响应

Abstract:

Based on temperature，rainfall and sunshine hours data during spring wheat growth period ( March to June) from 78 stations of Gansu Province in recent 45 years，the spatial and temporal evolution and climate response of spring wheat yield were analyzed by means of REOF and wavelets analysis． The results are as follows: ( 1) The spring wheat yield decreased from west to east and north to south region in Gansu Province; ( 2) There was two special regions for spring wheat，in east region of Gansu Province，the spring wheat yield was obviously lower and unstable， especially for the loess plateau region of the middle Gansu，while in west region of Gansu Province，the spring wheat yield was higher and stable． And when higher yield appeared in Hexi Corridor，the lower yield appeared in east region of Gansu Province and vice versa; ( 3) The spring wheat yield was sensitive to temperature change in Hexi Corridor，but in the loess plateau region，it was sensitive to precipitation; ( 4) The spring wheat yield amplitude was smaller before 1991 in the most sensitive area and then increased，and the abundant and shortfall years alternated with two to three years period．

Key words: Gansu, spring wheat yield, spatial － temporal characteristic, climate warming, response