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高淀粉玉米杂交种凉单4号是武威市农业科学研究所以525-2-2为母本、593-1-2-1为父本杂交选育而成的玉米单交种。该品种生育期140d左右(武威井灌区),属中晚熟玉米品种。在1997-1998年的生产试验、示范中,2a平均产量11679~12402kg/hm2,较对照品种凉单1号增产15.6%~17.2%。在1995-2000年各级各类试验中表现出高产、优质、抗病和适应性强的特点,尤其是籽粒淀粉含量达74.25%,属高淀粉玉米品种,是理想的玉米淀粉工业原料品种。
Liang Dan No.4, a high-starch maize hybrid, is a single corn variety selected from 525-2-2 as female parent and 593-1-2-1 as male parent in Wuwei Academy of Agricultural Sciences. The variety of about 140d growth period (Wuwei Well Irrigation District), is a middle-late maturing corn varieties. In the production experiment and demonstration of 1997-1998, the average yield of 2a was 11679 ~ 12402kg / hm2, which increased 15.6% ~ 17.2% compared with that of the control. In 1995-2000 all kinds of tests at all levels showed high yield, high quality, disease resistance and adaptability, especially the starch content of 74.25%, is a high starch corn varieties, is the ideal corn starch industrial raw material varieties.