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我国多数玉米产区温、光、水条件较优越,但土壤自然肥力较低,尤其夏玉米产区,土壤复种指数高,耗肥量大,加之播种季节紧张,即便是窄行小麦套种夏玉米,其有机肥及底化肥也来不及施用,故追施足够的速效氮肥(不能忽略氮磷钾的适宜比例),便成为提高夏玉米产量的关键增产措施。夏玉米生育特点和吸肥规律夏玉米的生育特点和吸肥规律与春玉米有所不同。夏玉米吸氮高峰来的早而集中且多,吸肥强度也
Most of China’s maize producing areas are superior in temperature, light and water conditions, but their natural soil fertility is low. In particular, in summer maize producing areas, soil multiple seeding index is high, and the consumption of fertilizer is large. In addition, the sowing season is tight. Even the narrow row wheat intercropping summer maize , Its organic fertilizer and the bottom of the chemical fertilizer too late to apply, it is enough topdressing nitrogen fertilizer (can not ignore the appropriate proportion of nitrogen, phosphorus and potassium), it will become the key to increase summer maize yield measures. The characteristics of summer maize fertility and the law of absorption of fertilizer Summer maize characteristics and the law of fertilization and spring corn are different. Summer corn nitrogen peak early and concentrated and more, fat absorption intensity also