【摘要】 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。更多还原

【Abstract】 Cutting central and lower parts of maize leaives to make the leaf area index(LAI) range among 4.5 to 7.0,to study the effects of leaf cutting treatment to maize yield under the high plant population cultivation condition.The results showed that all the yields of treatments were higher than CK,the highest yield was LAI 5.5 treatment.Put the LAI 5.5 as the model,the more the number of the LAI to the model,the lower the yield.The harvest ears was more along as the LAI was less.The most kernel of ear is the treatment LAI 5.5.The weight of 100 kernel was not signifisant difference on all treatments.更多还原