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以黑龙江省玉米生产上常用的12个杂交种为供试材料,分析灌浆后期品种间子粒干物质积累速率的差异。结果表明:玉米杂交种吐丝后40～65 d百粒重增长符合Logistic曲线;子粒平均干物质积累速率差异显著,其中四密25最高,为0.558 g/(d.100粒);四单19最低,仅为0.433 g/(d.100粒);从大到小依次为四密25>东农250>白单9号>本育9>中单2号>吉单180>庆单2号>丰禾10>龙单21>久龙1号>四单16>四单19。各杂交种最大干物质积累速率集中在吐丝后40～45d和50～55d两个阶段。
Twelve hybrids, which are commonly used in maize production in Heilongjiang Province, were used as materials to analyze the differences of dry matter accumulation rate among different grain-filling varieties. The results showed that the logarithmic growth of 100-grain weight increased 40-65 days after silking. The average dry matter accumulation rate of grain was significantly different, among them, the highest value of four-density 25 was 0.558 g / (d.100) The lowest was only 0.433 g / (d.100 grains); descending order was Si Mi25> Dongnong 250> Bai Dan 9> Benyu 9> Zhongdan 2> Ji Dan 180> Qing No. 2 > Fenghe 10> Long Shan 21> Long Long 1> Four single 16> Four single 19. The maximum dry matter accumulation rate of all the hybrids concentrated in 40 ~ 45d after silking and 50 ~ 55d two stages.