【摘要】 基于涡度相关系统,并引入O₃损耗半机制模型,分析了南京地区冬小麦主要生育期总初级生产力（GPP）的变化,并模拟了不同O₃含量胁迫条件下冬小麦GPP的损耗.结果表明:①冬小麦GPP随其生育期变化,呈现出"中间时段高,前后期低"的分布趋势,最大值为40μmol·（m2·s）-1;②基于高、低两种O₃敏感度效应,150、100和50 n L·L-1组和本研究（CK组）胁迫条件下,冬小麦GPP损耗率分别为:-72%、-36%、-6%、-10%和-13%、-6%、-1%、-2%.损耗评估结果可为我国制定防御O₃对作物伤害对策提供科学依据.更多还原

【Abstract】 An eddy-covariance system combined with a semi-mechanistic model was used to analyze variations in gross primary productivity（ GPP） and to simulate the impact of ozone（ O₃） on GPP under different levels O₃ concentrations over a winter wheat field in Nanjing. The results showed that GPP was higher during the middle of the growth period and low during the early and late growth periods,reaching a maximum of 40 μmol·（ m2·s）-1.Using high and low ozone sensitivity settings,O₃-damage in 150,100,50 n L·L-1 and control treatment（ CK） reduced GPP by-72%,-36%,-6%,and-10%,and by-13%,-6%,-1%,and-2%,respectively. These results provide a scientific basis for formulating defense strategies for O₃ damage to crops.更多还原