紧凑型玉米具有较好的耐密性和群体光合性能。当前肥水条件得到改善,种植紧凑型面积逐年扩大。在小麦、玉米一年两熟制耕作区,近年来,机械收割小麦面积不断扩大,套种面积逐年减少,推迟了玉米播期,由于积温不足和紧凑型玉米杂交种具有早白皮、晚成熟的“假熟”现象,收获时玉米灌浆继续进行,千粒重降低。成为限制紧凑型玉 Compact corn has better density and population photosynthetic performance. The current fertilizer and water conditions have been improved, planting a compact area has expanded each year. In the two-year farming system of wheat and corn, in recent years, the area of ​​mechanically harvested wheat continues to expand, the area of ​​intercropping has been reduced year by year, and the sowing date of corn has been postponed. Due to insufficient accumulated temperature and compact white corn hybrids with early white skin and late mature “Fake cooked” phenomenon, corn grain harvest at harvest continued, grain weight decreased. Become a limited compact jade