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在大田试验条件下于灌浆期对两种株型的高产玉米品种丰禾1(平展型)及郑单958(紧凑型)的冠层结构特征进行研究,并对灌浆期冠层结构与产量及其构成因素进行相关分析。结果表明:中密度处理下(丰禾1为5万株/hm2、郑单958为6万株/hm2),灌浆末期叶面积指数最高,衰减最慢,产量最高(丰禾1为9896kg/hm2、郑单958为10867kg/hm2);灌浆期平均叶倾角总趋势为先增大后减小;两个株型玉米品种株高、穗位高均随密度增加而增大,茎粗变化趋势相反;灌浆前期和中期叶面积指数与穗数呈显著正相关,与百粒重显著负相关;茎粗与穗粒数正相关,与百粒重呈现极显著正相关。
The canopy structure characteristics of two high yielding maize cultivars Fenghe 1 (flat type) and Zhengdan 958 (compact type) were studied under field test at grain filling stage. The canopy structure and yield, The factors that make the correlation analysis. The results showed that the leaf area index was the highest, the slowest was the decay and the highest was the highest yield (Fenghe 1 was 9896kg / hm2) under medium density treatment (Fengwo 1 was 50000 / hm2 and Zhengdan 958 was 60 000 plants / hm2) , And Zhengdan 958 was 10867 kg / hm2). The trend of average leaf inclination at grain filling stage firstly increased and then decreased. The plant height and ear height of two plant type maize varieties increased with the increasing of density and the stem diameter changed in the opposite direction There was a significant positive correlation between leaf area index and panicle number at the early and middle filling stage and a significant negative correlation with the 100-kernel weight. The stem diameter was positively correlated with the panicle number and had a significant positive correlation with the 100-kernel weight.