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选用具有高产潜力的6个玉米杂交种,采用12万株/hm的密度大田种植,研究高产玉米不同品种子粒灌浆特征的差异及其与粒重的关系。结果表明,个玉米杂交种均可实现15 000 kg/hm的高产水平。良玉66和中单909前中期灌浆速率高,且最早到达最大灌浆速率;灌浆速率下降慢的品种,成熟相对偏晚。品种间差异主要是灌浆速率和到达最大灌浆速率的时间不同,活跃灌浆期并没有明显差异。影响不同品种粒重的主要因素是线性灌浆期和缓慢灌浆期的灌浆速率。因此提高品种的线性灌浆期和缓增期灌浆速率可以增加粒重。在新疆伊犁春播玉米高产区,适宜的高产品种为中单909和良玉66。
The six maize hybrids with high yield potential were selected and the density of 120,000 plants per hectare was used to study the difference of grain filling characteristics and the relationship between grain filling weight and the grain filling characteristics of different varieties of high yield maize. The results showed that all the maize hybrids could achieve the high yield of 15 000 kg / hm. The grain filling rate of Liangyu 66 and Zhongdan 909 in the middle and early stages was high and the maximum grain filling rate was reached at the earliest. The varieties with slower grain filling rate were relatively late in maturity. Differences among cultivars were mainly grouting rate and time to reach the maximum filling rate. There was no significant difference in the active filling stage. The main factors affecting the grain weight of different varieties were the filling rate in linear filling stage and slow filling stage. Therefore, to improve the varieties of linear filling stage and slow filling rate can increase grain weight. In the spring sowing high-yielding region of Yili, Xinjiang, the suitable high-yielding varieties are Zhongdan 909 and Liangyu 66.