大气CO2浓度升高与氮肥互作对玉米花后碳氮代谢及产量的影响

李明,李迎春,牛晓光,马芬,魏娜,郝兴宇,董李冰,郭李萍

Effects of Elevated Atmospheric CO2 Concentration and Nitrogen Fertilizer on the Yield of Summer Maize and Carbon and Nitrogen Metabolism After Flowering

LI Ming,LI YingChun,NIU XiaoGuang,MA Fen,WEI Na,HAO XingYu,DONG LiBing,GUO LiPing

图3 不同处理主要时期夏玉米地上部生物量 ZN、CN分别指不施氮和常规氮用量处理,aCO2和eCO2分别指常规浓度CO2处理和高浓度CO2处理。V6：6叶期;V12：大喇叭口期;VT：吐丝期;R2：吐丝后14 d;R3：吐丝后28 d;R6：成熟期。不同小写字母表示在同一时期不同处理间差异达5%显著水平。ns表示不显著。下同

Fig. 3 The above-ground biomass of summer maize under different treatments ZN and CN mean the treatments of no nitrogen and control nitrogen. aCO2 and eCO2 mean the CO2 treatment of control concentration and elevated concentration. V6: 6-leaf stage; V12: 12-leaf stage; VT: Silking stage; R2: 14 days after silking stage; R3: 28 days after silking stage; R6: Physiological maturity. Different lowercase letters indicate a 5% significant difference between different treatments in the same stage. ns means not significant among different treatments at 5% level. The same as below