大气CO2与温度升高对北方冬小麦旗叶光合特性、碳氮代谢及产量的影响

宗毓铮,张函青,李萍,张东升,林文,薛建福,高志强,郝兴宇

Effects of Elevated Atmospheric CO2 Concentration and Temperature on Photosynthetic Characteristics, Carbon and Nitrogen Metabolism in Flag Leaves and Yield of Winter Wheat in North China

ZONG YuZheng,ZHANG HanQing,LI Ping,ZHANG DongSheng,LIN Wen,XUE JianFu,GAO ZhiQiang,HAO XingYu

表3 CO2浓度和气温升高对小麦灌浆期叶片光响应参数的影响

Table 3 Effects of elevated CO2 and increased temperature on leaf response parameters under different illumination levels of wheat at filling stage

处理 Treatment 光饱和点 Light saturation point (LSP) (μmol·m-2·s-1) 光补偿点 Light compensation point (LCP) (μmol·m-2·s-1) 最大净光合速率 Maximum net photosynthetic rate (Pnmax) (μmol·m-2·s-1) 暗呼吸速率 Dark respiration rate (Rd) (μmol·m-2·s-1) CK 2235.92±508.20ab 12.83±0.07ab 18.28±1.35b 1.01±0.14a EC 2554.62±146.51a 10.47±5.17ab 22.07±0.58a 0.88±0.41a ET 1475.33±118.13b 4.19±0.52b 19.99±0.28ab 0.42±0.05a ECT 1481±150.09b 15.76±0.97a 22.59±0.61a 1.14±0.11a P-value PT 0.01 0.54 0.21 0.49 PCO2 0.58 0.01 0.00 0.23 PT×CO2 0.59 0.03 0.48 0.09