玉米生物产量对施复合肥深度的响应

Response of Maize Biological Yield to the Depth of Compound Fertilizer Application

[目的]探明施肥深度对玉米产量的影响。[方法]采用田间试验方法,设计不同深度(5、15、25 cm)施肥处理,分析其对玉米产量的影响。[结果]种下施肥(15 cm)较正常施肥(5 cm)玉米叶面积指数平均增加6.0%;单位面积粒数增加20.5%;空秆率及千粒重差异不显著,种下15 cm施肥处理较正常5 cm施肥处理玉米产量增加16.8%。[结论]复合肥料深施15 cm能够使营养层与玉米主要根冠区域相重合,充分吸收复合肥所提供的能量要素,促进单位面积粒数和干物质的增加,从而达到提高玉米产量的目的。

[Objective]To explore the effect of fertilization depth on maize yield.[Method]A field experiment was conducted to study the effects of fertilization depth(5,15,25 cm)on the yield of maize.[Result]The leaf area index increased by 6.0%in 15 cm fertilization compared with 5 cm fertilization.The grain number per unit area increased by 20.5%,and there was no significant difference in empty stalk rate and 1000-grain weight,the yield of maize increased by 16.8%under 15 cm fertilization compared with that under 5 cm fertilization.[Conclusion]Applying compound fertilizer under 15 cm deep can make the nutrient layer coincide with the main root and shoot working area of maize,fully absorb the energy elements provided by compound fertilizer,and promote the increase of grain number and dry matter per unit area,thus,the aim of increasing corn yield was achieved.