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掖单四号玉米良种是山东省莱州市农科所培育的高产玉米良种,1990年春被列入国家级科技成果重点推广项目。一、主要特征 1.生育期较短:属中早熟杂交种,夏播93～98天,春播115～125天。 2.株型紧凑,光合能力强,适合密植创高产。株高250～270厘米,上位叶夹角18度,受光势态好,光能利用率高,在
Yedan No.4 maize variety is a high-yielding corn variety bred by the Agricultural Science Division of Laizhou City, Shandong Province. In the spring of 1990, it was listed as a key promotion project of national scientific and technological achievements. First, the main features 1. Short duration of growth: is a premature hybrids, summer sowing 93 to 98 days, spring sowing 115 to 125 days. 2. Compact plant type, photosynthetic ability, suitable for planting a high yield. Plant height 250 ~ 270 cm, the angle between the upper leaf 18 degrees, good light-receiving potential, high utilization of light energy, at