郑单 958系河南省农科院粮作所最近育成，具有高产、稳产、优质、多抗、广适、耐密植等特点的玉米单交种。在河南省和国家区试及生产试验中，连续 6次产量均居第 1位，增产幅度为 11.5％～ 28.0％。于 2000年同时通过了河南、河北、山东及国家审定，被农业部列为重点推广的高产 Zhengdan 958 Department of Henan Academy of Agricultural Sciences recently bred grain, with high yield, stable yield, high quality, multi-resistant, widely adapted, close planting and other characteristics of corn single cross. In Henan Province and the state trial and production test, the output of 6 consecutive times ranked first, the rate of increase of 11.5% to 28.0%. In 2000 at the same time adopted by Henan, Hebei, Shandong and national validation, the Ministry of Agriculture as a key to promote the high yield