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盂县从1980年以来开展玉米高产竞赛,平均亩产一直稳定在1,300～1,400斤。1983年,我们与后元吉大队王受祥、鲍双海合作,根据玉米拔节后与抽雄前是两个需肥高峰期的特点,分别在各3亩土壤条件、栽培管理、底肥用量基本一致的旱地玉米田,进行了追肥时期和追肥方法试验。王受祥玉米田追肥两次,第一次在6月下旬,玉米(中单2号)可见叶9—10片,开始拔节时趁墒刨坑亩深施硝铵15斤;第二次在7月中旬,玉米可见叶17—18片(大喇叭口期),结合降雨与中耕培土,刨坑穴施硝铵70斤;鲍双海田块则在王受祥第二次追
Yuxian since corn maize yield competition since 1980, the average yield has been stable at 1,300 to 1,400 pounds. In 1983, we cooperated with Wang Yuanxiang and Bao Shuanghai of Houyuanji Group. According to the characteristics of two peak needs of fertilizer during the post-jointing stage and the tasselling stage of maize, respectively, in 3 acres of soil condition, cultivation and management, , Carried out the top dressing time and dressing methods test. Wang Shuxiang cornfield topdressing twice, the first time in late June, corn (Zhong Dan 2) visible leaves 9-10, at the beginning of jointing shaving pit while planting nitrification 15 kg; the second in July In the middle of the corn leaves 17-18 (large bell mouth period), combined with rainfall and cultivated soil, pits pits ammonium nitrate 70 pounds; Bao Shuanghai Tian block in the second chase Wang Wangxiang