播期对华北平原雨养夏玉米产量形成与资源利用效率的影响

梁茜, 吴清山, 葛均筑, 吴锡冬, 杨永安, 侯海鹏, 张垚, 马志琪

Effects of Sowing Date on Rain-Fed Summer Maize Yield Formation and Resource Utilization in North China Plain

Liang Qian, Wu Qingshan, Ge Junzhu, Wu Xidong, Yang Yong’an, Hou Haipeng, Zhang Yao, Ma Zhiqi

表6 不同播期雨养夏玉米光、温、水资源生产效率

Table 6 The production efficiency of light, temperature and water resources of rain-fed summer maize at different sowing dates

处理 Treatment 品种 Variety 光能生产效率 Production efficiency of SR (g/MJ) 积温生产效率 Production efficiency of GDD [kg/(hm2·℃)] 降水生产效率 Production efficiency of Rf [kg/(hm2·mm)] SD1 JNK728 0.373 5.31 18.7 ZD958 0.329 4.56 16.5 SD2 JNK728 0.400 5.65 20.0 ZD958 0.387 5.43 19.3 SD3 JNK728 0.395 5.76 19.6 ZD958 0.376 5.42 16.2 SD4 JNK728 0.386 5.66 18.1 ZD958 0.378 5.51 17.6 SD5 JNK728 0.369 5.61 17.1 ZD958 0.300 4.54 13.9