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密云县太师庄村青年农民王化珍1983年承包种植1.81亩春玉米,亩产1,702.8斤,开创了本县玉米亩产的新记录。他在种植管理上采取的技术措施主要有四项:一、选用优良杂交种选用北京市农场局农科所新近育成的京白16(30212×莫20),4月25日播种,8月30日成熟。这一杂交组合经全县各试种点观察,生长期120天左右,株高230—240厘米,穗位较低(80—100厘米),株型紧凑,叶片较窄,下平展上直立,透光好,
Wang Yunzhen, a farmer from Taishi Village, Taiping County, Miyun County, contracted and planted 1.81 mu of spring corn in 1983, yielding 1,702.8 kg of mu per hectare, creating a new record of yield per mu in this county. His technical measures for planting and management mainly include four items: First, the selection of excellent hybrids Beijing Institute of Agriculture Bureau of Agriculture recently bred Jingbai 16 (30212 × Mo 20), sown on April 25, August 30 Japanese mature. The cross combination of the county through the test point of observation, the growth period of about 120 days, plant height 230-240 cm, ear lower (80-100 cm), plant compact, narrow leaves, flat under the erect, Good light,