长春夏播玉米的初步研究

Preliminary Study on Maize Planted in Summer in Changchun

在长春夏播6个玉米杂交种，各杂交种均生育期缩短，9月下旬乳熟。秃尖、千粒重和单株粒重在杂交种间表现差异较大。在长春冬小麦套种夏播玉米有可能是增加作物单位面积产量的一种有效措施，

Six maize (Zea mays L. ) hybrids were planted in summer in Changchun. The growing stages of all hybrids were shorten and primary mature stage appeared during the last ten days of septemher. There was large difference amomg hybrids in length of hald top, 1000 - grain weight and grain weight per plant. Interplanting maize with winter wheat in summer would be a effective means on raising crop yield of unit area.