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在抽雄期将密度为100 000株/hm2的玉米植株剪去部分穗位叶及穗位下部分叶片,将叶面积系数控制在4.5～7.0,研究剪叶处理对玉米产量的影响。结果表明:剪叶处理的产量都高于不剪叶处理(CK),剪叶后叶面积系数为5.5的处理产量最高,为14 211 kg/hm2。以叶面积系数5.5为中间值,叶面积系数距5.5越远,产量越低。收获穗数随叶面积减少而增加,穗粒数以叶面积系数5.5处理最多,百粒重变化不显著。
At the tasseling stage, corn plants with a density of 100 000 plants / hm2 were cut off from some ear leaves and some parts below the ear position, and the leaf area coefficient was controlled at 4.5-7.0 to study the effect of cutting the leaves on the yield of corn. The results showed that the yield of the cut leaves was higher than that of the non-cut leaves (CK), and the yield of the cut leaves with the leaf area coefficient of 5.5 was 14 211 kg / hm2. Taking the leaf area coefficient 5.5 as the median, the leaf area coefficient farther away from 5.5, the lower the yield. The number of ears per plant increased with the decrease of leaf area. The number of grains per spike was the highest with the leaf area coefficient of 5.5 and the change of 100-kernel weight was not significant.