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本文选用１５份有代表性的玉米自交系，在５、６、８、１０、１２展叶期进行剪叶处理，对玉来自交系某些性状的变化规律进行试验研究，为育种、制种过程中调节亲本自交系花期提供补救措施。结果表明：１．剪叶处理后玉米自交系的抽雄、散粉、抽丝期均有不同程度的延迟，且随剪叶时期和剪叶量的增加延迟天数增多。２．剪叶处理后其百粒重、单穗粒重、小区产量均有不同程度的下降，且随剪叶时期和剪叶量的增加而下降幅度增大。
In this paper, 15 representative maize inbred lines were selected and cut in the 5, 6, 8, 10, 12 leaf stage to study the changes of some traits of Jade from inbred lines. In the process of regulating the flowering of parental inbred lines to provide remedial measures. The result shows: 1. The results showed that there were some delays in tasselling, bulking and spinning of maize inbred lines after shearing leaf treatment, and the delay days increased with the increase of shearing time and leaf cutting. 2. After cutting the leaves, the 100-grain weight, grain weight per panicle, and the yield of the community all decreased to different extents, and decreased with the increase of the leaf-cutting period and the amount of the cut leaves.