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通过不同玉米品种比较,研究玉米新品种登海661的高产特性,为超高产玉米育种和栽培提供科学依据。结果表明,登海661的穗大、粒重,单株子粒产量高,分别较郑单958和农大108高25%和30%;干物质积累量大,与郑单958和农大108的差异主要表现在花后;叶面积指数高值持续期较长,在生育后期下降速度慢。登海661的株高、穗位高分别较郑单958和农大108低18.53%、22.68%和51.97%、48.03%,穗高系数显著低于郑单958和农大108;穗部及上下两节间较短,抗倒伏,耐密植。
Through the comparison of different maize varieties, the high yield characteristics of new maize variety Denghai 661 was studied, which provided scientific basis for the breeding and cultivation of super high yield maize. The results showed that Denghai 661 had the highest spike weight and grain weight, the higher the yield per plant, which was 25% and 30% higher than that of Zhengdan 958 and Nongda 108 respectively. The difference of major dry matter accumulation, Zhengdan 958 and Nongda 108 was After anthesis, the high value of leaf area index lasted for a long time and declined slowly in the later period of childbearing. The height and ear height of Denghai 661 were 18.53%, 22.68% and 51.97%, 48.03% lower than that of Zhengdan 958 and Nongda 108, respectively, and the coefficient of ear height was significantly lower than that of Zhengdan 958 and Nongda 108 Between the shorter, lodging resistance, close planting.