探究喷施有机硒生物肥对陇东黄土旱塬春玉米产量及硒积累的影响，为陇东旱塬区富硒玉米生产提供参考。以玉米品种先玉1483为试验材料，设置120、240、360、720 kg/hm2不同梯度有机硒生物肥喷施处理。结果表明，喷施有机硒生物肥显著影响玉米生物产量，对玉米籽粒产量无显著性影响。喷施有机硒生物肥240 kg/hm2处理玉米产量最高，生物产量和籽粒产量分别较喷施清水对照提高了17.68%、5.55%。玉米籽粒、秸秆硒含量均随有机硒生物肥喷施量增加而显著增加，分别较喷施清水对照提高0.28~1.49、5.86~22.31倍。综上，喷施有机硒生物肥对陇东黄土旱塬春玉米的产量和籽粒、秸秆硒含量有一定促进作用，尤以喷施有机硒生物肥240 kg/hm2时效果最佳。

To investigate the effects of foliar application of organic selenium bio-fertilizer on yield and selenium accumulation in spring maize on the Dryland of Loess Plateau in eastern Gansu, and to provide a reference for selenium-enriched maize production in this region, a field experiment was conducted using the maize variety Xianyu1483. Four application rates of organic selenium bio-fertilizer (120, 240, 360, 720 kg/ha) were set as treatments. Results showed that foliar application of organic selenium bio-fertilizer significantly affected maize biomass yield, while the grain yield was not significantly influenced. The highest maize yield was observed at 240 kg/ha, with biomass and grain yields increased by 17.68% and 5.55%, respectively, compared to the water-sprayed control. Selenium content in both grain and straw increased significantly with higher fertilizer application, reaching 0.28 to 1.49 and 5.86 to 22.31 times compared to the control levels, respectively. In conclusion, foliar application of organic selenium bio-fertilizer promotes biomass yield and selenium enrichment in grain and straw of spring maize on the dryland of Loess Plateau, with the best effect observed at 240 kg/ha.

S513；S147.2

甘肃省重点研发计划(22YF7N216)；国家重点研发计划(2024YFD23002)；中央引导地方科技发展资金项目(24ZYQA022)；甘肃省技术创新引导计划科技专员专项(25CXGL003)；平凉市重点研发计划-农业类(PL-STK-2024A-027、PL-STK-2024A-036)。