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采用田间试验研究Agro Services International Inc(ASI)推荐施肥、缓/控释肥、保水型复混肥和普通复混肥对夏玉米产量、SPAD值及养分吸收积累的影响。结果表明,夏玉米施用缓/控释肥和ASI推荐施肥增产效果较好,分别比农户习惯施肥处理增产11.0%和9.8%,保水型复混肥没有显著增产效果。夏玉米专用缓/控释肥养分缓慢释放可弥补砂壤质潮土保肥性差的缺点,能维持夏玉米各生育时期较高的叶片叶绿素含量,促进夏玉米对氮、磷、钾养分的吸收利用,提高干物质积累量,具有显著增产效果,是砂壤质潮土区夏玉米适宜的化肥品种。
Field experiments were conducted to study the effects of Agro Services International Inc (ASI) recommended fertilization, slow / controlled release fertilizer, water-retaining compound fertilizer and ordinary compound fertilizer on the yield, SPAD value and nutrient absorption and accumulation of summer maize. The results showed that the summer maize with slow / controlled release fertilizer and ASI recommended fertilization yield better, respectively, than the farmers accustomed to fertilization yield 11.0% and 9.8%, water-saving compound fertilizer did not significantly increase the yield effect. The slow release of nutrient for summer maize slow / controlled release fertilizer can make up for the shortcomings of poor fertility in sandy loam soils, maintain the higher leaf chlorophyll content in summer maize and promote the absorption of nitrogen, phosphorus and potassium in summer maize Use and increase the accumulation of dry matter, with a significant yield increase, sandy loamy soil suitable summer maize varieties of fertilizers.