掖单系列紧凑型高光效玉米,是山东省莱州市玉米研究所选出的玉米单交种。代表种为掖单2号和掖单4号.这两个品种已被农业部列为“八五”期间重点推广品种.目前全国已有28个省(市)自治区种植,面积约9850万亩,我区1985年引进掖单2号(鲁玉2号),随后又引进掖单4,先后在武鸣、部安、大化、河池等10多个县(市)种植,累计栽培面积约11万亩,一般亩产干籽300—350公斤,小面积试验亩产650公斤.1990年,都安县澄江乡崇南村作秋玉米栽培,在十分干旱的情况下.5亩平均 Yedan series of compact high-efficiency corn, Laizhou City, Shandong Province corn Institute selected maize single cross-species. The representative varieties are Yedan No. 2 and Yedan No. 4. These two varieties have been listed by the Ministry of Agriculture as key promotion varieties during the “Eighth Five-Year Plan” period. At present, 28 provinces (municipalities) and autonomous regions have planted them in the country with an area of ​​about 98.5 million mu , Our district introduced Yedan No.2 (Luyu No.2) in 1985, and then introduced Yedan 4, which has been planted in more than 10 counties (cities) such as Wuming, Bu’An, Dahua and Hechi with a total cultivated area of ​​about 11 mu, generally 300-350 kg per mu of dry seeds, 650 kg per mu of small-area test.In 1990, Chongnan Village, Chengjiang Township, Du’an County was planted with autumn maize and under very dry conditions,