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郑单１８系河南省农科院粮作所最近选育的高产高淀粉玉米新品种，组合为郑２９×昌７－２。于２００１年６月通过国家审定（编号为国审玉２００１００８）。１特征特性夏播生育期９５天左右。株形紧凑，幼苗长势较强。株高２５０cm，穗位高１００cm，叶片上冲，透光性好。果穗?
Zhengdan 18 Department of Henan Academy of Agricultural Sciences recently selected high-yielding high-starch corn new varieties, combinations of Zheng 29 × Chang 7-2. In June 2001 passed the national certification (No. Jurchen 2001008). 1 characteristics of summer sowing period of about 95 days. Compact plant shape, seedlings grow stronger. Plant height 250cm, ear height 100cm, leaves on the red, good light transmission. Ear?