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在玉米栽培中,氮肥的施用时间十分重要。许多研究表明,植物根系发育以后,一大部份氮肥夏季侧施是有利的。作者以前的研究主要考查了氮肥(硫铵、硝铵、尿素和硝酸钠)和磷肥(过磷酸钙和磷酸-硫酸铵)在播前施用对玉米产量和肥料利用率的影响。本试验目的是,研究常用氮肥、两种用量(40+80kg/ha)、一次施用(播前)和分施(播前和植物生长期间侧施或喷施)对玉米产量和肥料利用率的影响。
In corn cultivation, nitrogen application time is very important. Numerous studies have shown that a large proportion of summer fertilizer application of nitrogen fertilizer is beneficial after plant root development. Previous studies by the authors examined the effects of nitrogen (ammonium, ammonium, urea and sodium nitrate) and phosphate (superphosphate and phosphoric acid-ammonium sulphate) applications on maize yield and fertilizer use efficiency. The purpose of this experiment was to study the effect of conventional nitrogen fertilizers, both at 40 + 80 kg ha -1, one application (pre-sowing) and sub-application (pre-sowing or plant spraying) on maize yield and fertilizer utilization influences.