砂壤质潮土夏玉米适宜的化肥种类研究

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。

Appropriate Fertilizer Variety for Summer Maize in Sandy Loam Fluvo-aquic Soil

The field experiment was conducted to study the effect of ASI recommended fertilization, slow/controlled release fertilizer, water-saving compound fertilizer and general compound fertilizer on yield, economic benefit, SPAD and nutrient accumulation of summer maize. The results showed that slow/controlled release fertilizer and ASI recommended fertilization achieved higher yield, the yield increased by 11.0% and 9.8%. But the effects of yield and benefit increasing were not significant by applying water-saving compound fertilizer. The slow/controlled release fertilizer special for summer maize is appropriate fertilizer variety in sandy loam fluvo-aquic soil, which making fertilizer nutrient slow release and make up for low fertility preserving capability, maintaining higher leaf chlorophyll content of summer maize in each growing stage, promoting nutrient absorption and utilization, increasing dry matter accumulation, yield and benefit significantly.