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2005-2006年,以春播玉米新品种“中单28”和对照品种“农大108”为试验材料,在密云不同地区进行示范种植,考察鉴定“中单28”在密云地区的适应性、稳产性和丰产性。同时,进行密度试验,确定“中单28”在密云地区的最佳推广密度。通过示范种植和密度试验得出,“中单28”在密云的不同地区、不同年份均表现出很好的抗逆性、稳产性和丰产性,适宜在密云地区推广种植,且相对“农大108”的增产效果明显,能够代替“农大108”作为密云地区的主推品种。“中单28”在密云地区的最佳推广密度为3600～3900株/667m2。
From 2005 to 2006, the new maize varieties “Zhongdan 28” and the control cultivar “Nongda 108” were used as experimental materials to carry out demonstration planting in different areas of Miyun. The investigation and identification of “Zhongdan 28 ” were conducted in Miyun area Adaptability, stability and high yield. At the same time, conduct density tests to determine the best promotion density of “Zhongdan 28 ” in Miyun. Through demonstration planting and density test, we found that “Zhongdan 28” showed good resistance, stable yield and high yield in different regions of Miyun and was suitable for popularizing planting in Miyun. “Nongda 108 ” yield increase effect is obvious, can replace “Nongda 108 ” as the main push varieties in Miyun area. “In a single 28 ” in Miyun area the best promotion density of 3600 ~ 3900 plants / 667m2.