气候变化背景下河北夏玉米生长季热量资源利用率时空变化

韩耀杰, 彭记永, 张溪荷, 李树岩

Spatial and temporal variations of heat resources utilization efficiency of summer maize in growth season under climate change in Hebei Province

HAN Yaojie, PENG Jiyong, ZHANG Xihe, LI Shuyan

图7 1981—2019年河北省夏玉米花前、花后积温（a）及花前、花后积温比（b）变化

Fig.7 Temporal change of accumulated temperature during pre and post flowering period of summer maize （a） and their ratio （b） from 1981 to 2019 in Hebei Province