中文摘要：

为了研究气温升高对农作物NO排放量的影响，以安徽省淮北地区农田生态系统为研究对象，利用生物地球化学过程模型——DNDC模型，研究了12种农作物NO排放量对气温升高的响应。结果表明，旱地农作物对气温升高的响应可以分为3类。第一类，农作物NO排放量对气温升高不敏感，包括玉米、棉花、豌豆、油菜、烟草和果树，气温从原始气温升高3℃，NO平均排放量变化不大。其中，当气温从原始气温升高1．5℃，6种作物NO平均排放量略微增大，气温从1．5℃升高至3℃，排放量稍微下降。第二类，农作物NO排放量对气温升高敏感，排放量随温度升高而下降，包括小麦和大豆，当气温从原始气温升高3℃时，NO平均排放量下降11．6％。第三类，农作物NO排放量对气温升高敏感，排放量随温度升高而升高，包括水稻、土豆、甘蔗和蔬菜，当气温从原始气温升高3℃，NO平均排放量升高8．4％。在气温升高的情况下，旱地农田生态系统NO排放量总体变化不大，平均升高0．88％。

英文摘要：

Abstract： Taking Huaibei in Anhui province as a study case, the DNDC model was tested to esti- mate the farmland NO emissions during the temperature rising. The results showed that the dry land crop response to elevated temperatures could be divided into three categories. In the first cat- egory,the crop NO emissions changed little when the temperature went up by 0-3 ℃ ,including corn,cotton,pea, rape, tobacco and fruit tree. At the same time, NO emissions increased slightly when the temperature went up by 0- 1.5 ℃, and decreased slightly when the temperature went up by 1.5-3 ℃. In the second category,the crop NO emissions decreased by 11.6% when the temperature went up by 0-3 ℃, including wheat and soybean. In third category, the crop NO emissions increased by 8.4% during the temperature went up by 0-3 ℃ ,including rice, potato, sugarcane and vegetable. In the case of rising temperatures, NO emissions changed little overall in the dryland ecosystem.