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平单二号玉米是平凉地区农科所1978年用自交系水29作母本,黄早四作父本杂交选育而成的中熟玉米单交种。经历年试验示范,该杂交种在平凉东部川区和西部河谷区一般亩产450—600公斤,塬区300—400公斤,阴湿山区500公斤左右,平均亩产略高于中单二号,且稳产性强。1985年经甘肃省农作物品种审定委员会审定定名。目前在本区种植面积达1.2万亩。1987年获平凉地区科技进步二等奖,1988年获甘肃省科技进步三等奖。
Ping-ping No. 2 corn Pingliang area of Agricultural Science Institute in 1978 with inbred water 29 as the female parent, Huangzao IV parental cross-breeding of medium-maturity corn single cross. Experienced years of experimental demonstration, the hybrids in Pingliang eastern Sichuan and Western River Valley generally 450-600 kilograms per mu, 300-400 kilos in the highland area, 500 kilos in the wet mountainous area, the average yield slightly higher than in the number two, And stable and strong. In 1985 by the Gansu Provincial Crop Variety Approval Committee validated naming. At present, the planting area in this area amounts to 12,000 mu. Pingliang area in 1987 won the second prize of scientific and technological progress, in 1988 won the third prize of scientific and technological progress in Gansu Province.