CAJ | 학술논문

　　为寻求华北平原粮食高产区夏玉米合理的种植密度，实现夏玉米高产和稳产。在大田条件下，进行了以玉米行距为主处理，不同株距为副处理的裂区试验对夏玉米产量及产量结构的影响。结果表明，60 cm行距的玉米产量低于50 cm的产量。在行距为50 cm时，以25 cm和28 cm株距的玉米产量较高，且差异不显著，33 cm株距的玉米产量居中，22 cm株距的玉米产量最低。在行距为60 cm时，以22 cm和25 cm株距的产量较高。不同行距和株距对玉米穗粒数的影响较大，各处理间的差异显著，宽行距和宽株距都有利于穗粒数的增加。而玉米的千粒重则受行距和株距的影响较小，60 cm和50 cm行距下的玉米千粒重差异不显著，25 cm和28 cm的千粒重较高。因此，华北平原冬小麦/夏玉米一年两熟种植模式中，冬小麦收获后机械播种夏玉米，行株距为50 cm×28 cm组合有利于夏玉米产量的发挥。
　　위심구화북평원양식고산구하옥미합리적충식밀도，실현하옥미고산화은산。재대전조건하，진행료이옥미행거위주처리，불동주거위부처리적렬구시험대하옥미산량급산량결구적영향。결과표명，60 cm행거적옥미산량저우50 cm적산량。재행거위50 cm시，이25 cm화28 cm주거적옥미산량교고，차차이불현저，33 cm주거적옥미산량거중，22 cm주거적옥미산량최저。재행거위60 cm시，이22 cm화25 cm주거적산량교고。불동행거화주거대옥미수립수적영향교대，각처리간적차이현저，관행거화관주거도유리우수립수적증가。이옥미적천립중칙수행거화주거적영향교소，60 cm화50 cm행거하적옥미천립중차이불현저，25 cm화28 cm적천립중교고。인차，화북평원동소맥/하옥미일년량숙충식모식중，동소맥수획후궤계파충하옥미，행주거위50 cm×28 cm조합유리우하옥미산량적발휘。
To study the suitable plant density of summer maize and keep high yield of summer maize in the North China plain. Field experiment was conducted to study the effects of different row spacing, planting distance and their interactive effects on the yield and yield components of summer maize. Split plot design was used with row spacing of 60 cm and 50 cm in the main plots and plant distance of 22 cm, 25 cm, 28 cm and 33 cm treatments in the sub-plots. The results showed that, the yield of 60 cm row spacing treatment was lower than that of 50 cm row spacing treatment. With 50 cm row spacing, the yield with 25 cm and 28 cm plant distance treatments were much higher. There was no significant difference between the two treatments. 22 cm plant distance treatments produced the lowest yield, and the yield of 33 cm treatment was in middle. With 60 cm row spacing, the yield with 22 cm and 25 cm plant distance treatments were much higher. There was no significant difference between the two treatments. 33 cm plant distance treatments produced the lowest yield, and the yield of 28 cm treatment was in middle. Row spacing and planting distance significantly affected the kernels per spike. Wide row spacing and wide plant distance increased the kernels per spike. Seed weight was less affected by row spacing. There was no significant difference between 60 cm and 50 cm row spacing in seed weight. The highest seed weight was achieved with the treatments of 28 cm and 25 cm plant distant. There was significant difference among the treatments. The results showed that the combination of 50 cm row spacing and 28 cm plant distant was beneficial to high yielding of summer maize in the North China Plain.