【摘要】 通过分析冬小麦生育期、产量与温度的关系及变化趋势,建立回归模拟方程,揭示冬小麦对气候变暖的响应,为种植结构调整和粮食安全提供理论依据。结果表明:1980年以来,天水冬小麦对气候变暖的响应主要表现为出苗期、拔节期、抽穗期、成熟期缩短,返青期推迟;增温使出苗～返青期、拔节～抽穗期延长,返青～拔节、抽穗～成熟期缩短;随着冬小麦全生育期平均气温和地温的升高,全生育期以6.7 d/10a的速度缩短;小麦全生育期与5、10、15、20 cm平均地温均呈负相关。小麦产量有先降后升的变化趋势。天水市小麦适宜播期应在10月1日左右。更多还原

【Abstract】 Through the analysis of winter wheat growth period in Tianshui,correlation between yield and temperature and its variation trend,regression simulation equations were established to reveal winter wheat response to climate warming,for providing a theoretical basis for planting structure adjustment and food security.The results show that since 1980,the response winter of wheat to climate warming is mainly showed as the shortening of the stages of seedling,shooting,heading and maturity,and the postponing of reviving stage;Temperature increase elongated the period of seedling~reviving and shooting~heading,and shortened that of reviving~shooting and heading~maturity;With rising of average temperature and ground temperature,the whole growth period shortened by 6.7 d/10a;The duration of whole growth period of wheat was negatively correlated with the average temperature in 5 cm,10 cm,15 cm and 20 cm soil layers;The wheat yield showed a changing trend of dropping first and rising then.The suitable sowing date of wheat in Tianshui is around October 1.更多还原