河南省玉米生产现状、问题与对策

对2000～2007年河南省玉米生产现状进行分析，玉米单产、总产和种植面积都呈逐年上升态势。推广面积在0.667万hm²以上品种保持在20～30个，6.67万hm²以上品种3～7个。自育品种所占比例逐年升高，推广面积占全省比例越来越大，2007年达77.6％，平均每年增幅14.68万²。耐密型品种呈持续上升趋势，稀植大穗型品种则呈不断下降的趋势。种质集中在改良Reid、塘四平头和PB系统，占87%。对河南省玉米单产、总产和增产潜力做了分析，并提出了玉米生产中存在的问题与对策。

Current Status, Problems and Countermeasures of Maize Production in Henan Province

In this article,the current status of maize production,unit area yield and general production,variety utilization were analyzed in Henan province from 2001 to 2007.Unit area yield,general production and planting area were increased with year after year.Varieties with planting area exceeding 6 670 hectares held on 20-30,varieties with planting area exceeding 66 700 hectares held on 3-7,whose planting area occupied dominant station with 60-70 percentage of planting area in whole province.The proportion of variety selected by breeders of Henan province increased year by year and so did the planting area with the average of 146 800 hectares.The proportion of planting area reached 77.6% in 2007.Varieties with bearing high density token on uptrend,but varieties with sparse big ear in reverse.Dominant germplasms were Reid,Sipingtou and PB in Henan province,which occupied 87% of the total maize germplasms.In the end,problems and strategies in maize production of Henan province were proposed.