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5 雨养夏玉米产量及其构成因素与不同生育时期气候资源的相关性分析

Table 5 Correlation analysis between rain-fed summer maize yield and yield components, and climatic resources in different growth periods

生育期Growth stage 指标Index 最高温Tmax 最低温Tmin 积温量GDD 光辐射量SR 降雨量Rf 出苗-吐丝期E-S 产量Grain yield 0.375 -0.090 -0.245 0.207 -0.365 穗数Ear number – – – – – 穗粒数Grains per ear 0.164 -0.480 -0.254 0.456 -0.471 千粒重1000-grain weight 0.356 0.865** 0.076 -0.613 0.461 吐丝-成熟期S-M 产量Grain yield 0.493 0.506 0.486 0.337 0.264 穗数Ear number – – – – – 穗粒数Grains per ear 0.734* 0.744* 0.779** 0.667* 0.436 千粒重1000-grain weight -0.707* -0.708 -0.648* -0.525 -0.354 全生育期E-M 产量Grain yield 0.516 0.552 0.452 0.514 -0.137 穗数Ear number – – – – – 穗粒数Grains per ear 0.739* 0.759* 0.764* 0.781** -0.031 千粒重1000-grain weight -0.689* -0.675* -0.672* -0.713* 0.141