应用WOFOST模型模拟低温与干旱对玉米产量的综合影响

Application of WOFOST Model in Simulation of integrated Impacts of Low Temperature and Drought on Maize Yield

在玉米苗期和抽雄期利用人工气候箱对不同水分条件下的玉米植株分别进行低温处理,通过控制试验分析了低温、干旱以及二者合并对玉米生产的影响,在此基础上应用WOFOST作物模型模拟分析了低温、干旱以及二者合并对东北地区玉米产量的影响。试验与模拟结果均表明,低温、干旱以及低温和干旱并发都会使玉米的产量下降,而且低温和干旱并发的影响都要比单一灾害发生条件下大,减产幅度在34.5%左右。同时也很好地验证了WOFOST作物模型应用于低温和干旱对玉米产量影响的适应性。

Maize plants were treated by the low temperature under different water conditions during seedling and tasseling periods in the artificial climate chamber to determine the impacts of low temperature, drought and their combination on maize yield in the Northeast China. Based on the results of the controlled experiment, the WOFOST model was applied to simulate the integrated impacts of low temperature and drought on maize yield. The results of both experiment and simulation showed that the low temperature, drought and their combination would lead to decrease of maize yield to a certain extent. The impacts of the low temperature and drought combination would reduce the maize yield by 34. 5% which was higher than by low temperature and drought separatedly.