基于品种生育期有效积温确定夏玉米适宜播期

陈静,任佰朝,赵斌,刘鹏,杨今胜,张吉旺

Determination on Suitable Sowing Date of Summer Maize Hybrids Based on Effective Accumulated Temperature in Growth Period

CHEN Jing,REN BaiZhao,ZHAO Bin,LIU Peng,YANG JinSheng,ZHANG JiWang

表5 不同熟期夏玉米品种的雄穗发育特性

Table 5 Tassel traits of summer maize hybrids differing in maturities

年份 Year 品种 Hybrid 播期 Sowing date （M-D） 雄穗分支数 Tassel branch numbers 雄穗总小花数 Total tassel spikelet numbers 不育小花数 Spikelet abortion numbers 小花败育率 Spikelet abortion rate (%) 2018 JNK728 06-05 9 568a 21c 3.70b 06-15 9 537b 30b 5.59b 06-25 7 544ab 52a 9.56a DH618 06-05 7 640c 64a 10.00a 06-15 8 689b 45b 6.53b 06-25 8 798a 24c 3.01c ZD958 06-05 23 1156b 54b 4.67b 06-15 22 1176b 61b 5.19b 06-25 25 1365a 176a 12.89a DH605 06-05 10 815a 56b 6.87b 06-15 8 622b 28c 4.50c 06-25 9 806a 83a 10.30a 2019 JNK728 06-05 10 683a 3b 0.44b 06-15 9 607b 10a 1.65a 06-25 8 506c 8a 1.58a DH618 06-05 6 613a 9a 1.46a 06-15 6 500b 8a 1.60a 06-25 5 591a 11a 1.86a ZD958 06-05 21 1389a 2c 0.14c 06-15 20 1295b 21b 1.62b 06-25 24 1447a 55a 3.80a XY335 06-05 5 453b 2c 0.44c 06-15 5 563a 17b 3.02b 06-25 5 537a 36a 6.70a