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对2个超高产玉米品种先玉335和郑单958在5个密度种植条件下的穗部性状整齐度与产量的关系进行了研究。结果表明,穗部各性状整齐度与产量均呈正相关,并且行粒数整齐度、穗粒数整齐度、穗位高整齐度均在7.5万株/hm2和9.0万株/hm2两个密度条件下最高;先玉335产量在9.0万株/hm2条件下最高,7.5万株/hm2时次之;郑单958产量在7.5万株/hm2密度下最为突出;两个品种的穗位高整齐度和行粒数整齐度均与产量的关系最为密切。行粒数整齐度和穗位高整齐度作为选择高产品种和采取适宜栽培措施的一项指标具有一定的可行性。
The relationship between the uniformity of ear traits and the yield of two super high yielding maize cultivars, Xianyu 335 and Zhengdan 958 under five density planting conditions was studied. The results showed that there was a positive correlation between the uniformity of grain traits and yield of panicle, and the uniformity of grain number, the uniformity of ear grains and the uniformity of ear height were both at the density of 75,000 / hm2 and 90,000 / hm2 Under the condition of 90,000 plants / hm2, the highest yield was 75,000 plants / hm2; the yield of Zhengdan 958 was the highest at the density of 75,000 plants / hm2; And line grain uniformity are the most closely related with the yield. Line grain number uniformity and ear uniformity as a high-yielding varieties and take suitable measures for cultivation of an indicator has a certain feasibility.