气候变化对石羊河、大凌河流域灌溉玉米生产的影响

Impacts of climate change on irrigated maize production in Shiyang and Daling River Basins

全球气候变化及其影响越来越受到广泛关注,生态环境已相对恶化的地区未来将可能更加脆弱。选取生态环境已十分脆弱的石羊河和大凌河流域,采用区域气候模式与CERES-Maize模型相结合的方法,模拟分析了基准气候(BS,1961-1990年)和A2、B2两种气候变化情景下2011-2100年2个流域灌溉玉米生产的变化,以了解未来气候变化对我国生态脆弱区农业生产的影响。结果表明,如果保持现有的生产状况,气候变化将导致石羊河、大凌河流域灌溉玉米稳产风险及低产出现的概率加大,给农业生产带来一定的经济损失,其中A2情景对玉米产量的负面影响大于B2情景。CO2肥效作用可以一定程度上缓解这种负面影响。未来两个流域玉米实际蒸散量和灌溉量总体上都表现出降低的趋势,考虑了CO2肥效后降低幅度更大,可能在一定程度上缓解目前玉米生产的用水矛盾。结合模拟结果,研究提出了2个流域未来可能采取的适应措施。

Climate change and its impacts receive great concern in both global and regional scale.In China,the impacts in arid and semi-arid areas in northern China bear greater attentions due to the vulnerable ecosystem and higher magnitude of climate change in these areas.Agriculture in northern part of China with vulnerable ecosystem is becoming more susceptible to climate change in the future.By using the modeling approaches,we investigated the impacts of climate change on irrigated maize production in two typical...