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早熟春玉米新品种龙单 13由黑龙江省农科院玉米研究中心抗病育种室选用半马齿型改良自交系K10为母本 ,以自育二环系龙抗 11为父本杂交育成 ,1994年春经黑龙江省农作物品种审定委员会审定推广。该品种生育日数 112～ 115d(哈尔滨 ) ,需≥ 10℃积温 2 32 0℃·d ,具有产量水平高、抗病抗逆性强 ,子粒商品品质好 ,适应性广的特点。适宜黑龙江省第三积温带和第二积温带下限以及吉林山区、半山区、内蒙古东北部旗 (县 )、河北部分市(县 )等早熟春玉米区种植。到 1999年龙单 13累积推广面积已达 173 82万h ,已成为北方早熟春玉米区主栽品种之一。
Early maturing spring variety Longdan 13 was selected from the resistant breeding room of Maize Research Center of Heilongjiang Academy of Agricultural Sciences by using semi-denture improved inbred line K10 as female parent and self-bred strain Longliang 11 as male parent. The spring of 1994 by the Heilongjiang Crop Variety Approval Committee examined and approved. The breeding days 112 ~ 115d (Harbin), required ≥ 10 ℃ accumulated temperature 2 32 0 ℃ · d, with high yield, resistance to disease resistance, good quality of grain, wide adaptability characteristics. It is suitable for planting the third accumulated temperate zone and the second accumulated temperature zone in Heilongjiang Province and the areas of early spring spring corn in Jilin Mountain, Mid-Levels, the flag northeast of Inner Mongolia and some cities in Hebei. By 1999, the accumulated area for promotion of Longdan 13 reached 17.32 million h and has become one of the main cultivars of spring maize in northern China.