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7 播期对不同熟期夏玉米穗部性状的影响（2019）

Table 7 Effects of sowing date on ear characters of summer maize hybrids differing in maturities (2019)

品种 Hybrid 播期 Sowing date (M-D) 空秆率 Empty shot rate (%) 双穗率 Double-ear rate (%) 畸形率 Abnormal ear rate (%) 穗长 Ear length (cm) 秃顶长 Barren ear length (cm) 穗粗 Ear diameter (cm) 秃尖比 Barren ear length/ ear length (%) JNK728 06-05 1.47b 0 27.16a 17.57a 1.54b 4.62b 8.74b 06-15 0c 0 27.11a 17.47a 2.22a 4.73b 12.71a 06-25 14.72a 0 13.70b 14.46b 0.94c 5.11a 6.61c DH618 06-05 2.08c 0 15.56a 17.17a 0.34c 4.6b 1.97c 06-15 3.50b 0 12.31b 17.56a 1.21a 4.85ab 6.80a 06-25 9.16a 0 8.92c 17.87a 0.91b 4.95a 5.06b ZD958 06-05 0c 1.28 12.42b 17.06a 0.63b 4.87b 3.69c 06-15 4.93b 0 11.59c 15.61b 0.68b 5.08ab 4.32b 06-25 9.09a 6.06 19.64a 13.29c 1.14a 5.19a 8.63a XY335 06-05 1.74c 0 19.16b 19.64a 1.90a 4.53b 9.65b 06-15 5.80b 0 9.46c 16.54c 0.81b 4.64ab 4.95c 06-25 14.06a 0 30.90a 17.51b 1.99a 4.98a 11.38a