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

表1 不同处理下的夏玉米产量及产量要素

Table 1 The yield and associated compositional elements of summer maize under different treatments

处理 Treatment 穗重 Ear weight (g) 穗粒重 Kernel weight (g) 千粒重 1000-kernel weight (g) 产量 Grain yield (t·hm-2) ZN-aCO2 185.2±14.7a 129.6±8.2a 264.6±8.3a 8.64±0.55a ZN-eCO2 184.6±14.4a 129.8±0.3a 264.0±2.8a 8.65±0.02a CN-aCO2 202.9±6.4a 132.7±0.2a 270.0±0.7a 8.85±0.01a CN-eCO2 203.9±8.3a 135.6±5.9a 272.0±4.5a 9.04±0.40a 差异显著性 Significance CO2 ns ns ns ns N ns ns ns ns CO2×N ns ns ns ns