为探明贵州春玉米适宜的覆膜方式及施氮量，采用裂区设计，连续两年在贵州威宁进行不同覆膜方式（宽膜、窄膜覆盖）与施氮量（0、80、160、240、320 kg/hm²）对春玉米产量及地上部干物质和氮素积累、转运特性的影响研究。结果表明，不同覆膜方式与施氮量间春玉米产量差异极显著，宽膜覆盖比窄膜覆盖产量提高15.61%。宽膜覆盖显著增加春玉米地上部干物质积累量、转运量和转运率，提高干物质转运对子粒物质积累的贡献率，显著增加春玉米氮素积累量。在宽膜覆盖条件下，施氮量为240 kg/hm²时春玉米产量最高，营养器官干物质和氮素转运量最高。宽膜覆盖提高玉米产量，促进春玉米干物质、氮素积累与分配，试验条件下适宜施氮量为240 kg/hm²。

To explore the optimized plastic film mulching mode and nitrogen(N) application rate of spring maize production in Guizhou province, the field experiments were conducted at Weining county in 2017 and 2018. The experimental design was a split-plot arrangement with three replications, the main plot had different plastic film mulching modes(wide film mulching mode and narrow film mulching mode), the subplot had different N application rates(0 kg/ha, 80 kg/ha, 160 kg/ha, 240 kg/ha and 320 kg/ha). The yield and dry matter and N accumulation and translocation of spring maize were determined. The results showed that both the film mulching modes and the N application rates affected the yield significantly. The wide film mulching mode achieved 15.61% higher yield than narrow film mulching mode due to the former mode increased aboveground dry matter accumulation, dry matter translocation amount, dry matter translocation percentage, contribution percentage of dry matter translocation to grain yield and N accumulation significantly. The highest yield was achieved at an N application rate of 240 kg/ha under wide plastic film mulching mode due to both the highest dry matter translocation amount and the highest N translocation amount.

公益性行业（农业）科研专项（201503127）、国家重点研发计划粮食丰产增效科技创新专项（2016YFD0300307）、贵州省特色粮油作物栽培与生理生态研究科技创新人才团队（黔科合平台人才〔2019〕5613号）、贵州省生物学一流学科建设项目（GNYL〔2017〕009）、贵州省普通高等学校粮油作物遗传改良与生理生态特色重点实验室（黔教合KY字〔2015〕333）、贵州省科技计划项目-黔科合基础〔2016〕1025