摘要
本研究结果表明，在山西晋中盆地条件下，不同时期追施氮肥，对特早熟夏玉米的三大产量形成因素（叶面积系数、光合势及净同化率）的发展动态产生不同影响。其中大喇叭口期追肥的叶面积系数发展动态较为合理，后期稳定在较高水平上，后期的光合势、净同化率也较高，产量最高。在施用了种肥的基础上，可于大喇叭口期追施氮肥，效果较好。
Ths result showed tha there was a different effect of different topdressing three main yield factors of especial－early summer corn in Jinzhong Basin. Combining with a part of fertilizer application at seed sowing, the especial－early summer com could accumulate more dry matter and nutrient and could get high economic yield when the nitrogen used as topdrssing was applying at the stage of the 9th spreading－leaf.
基金
山西省科技攻关项目
山西省青年学科带头人基金
