Abstract

Appropriate nutrient management practices are the determinant factors for maintaining good plant growth and development. The combination of inorganic fertilizers and straw may affect soil available micronutrients. The goals of this study were to determine the effects of Si fertilizers under straw return conditions on Si accumulation, partitioning, and remobilization in spring maize (Zea mays L.). A two-year field trial was conducted to investigate Si content accumulation and remobilization in spring maize under straw return conditions in Jilin Province. We evaluated Si accumulation and remobilization using four treatments: JS3 (straw return + 45 kg/hm² silicon), WS3 (no straw return + 45 kg/hm² silicon), JS0 (straw return + no silicon) and WS0 (no straw return + no silicon).The experimental results showed that the highest Si accumulation stage in maize occurred between the VT and R2 stages. The JS3 treatment accumulated 20.8% and 32.1% more Si, on average, than did the WS3 and WS0 treatments, respectively, at this stage. Different organs showed the same accumulation trend as the whole maize plant, but the Si remobilization amounts in distinct organs were the highest in the WS0 treatment. The total Si contribution to the grain in the WS0 treatment was 42.2% and 104.6% higher, on average, than those in the WS3 and JS3 treatments, respectively.This outcome showed that silicon fertilizer application could significantly increase silicon accumulation in maize plants and organs. Silicon fertilizer combined with straw returning not only further increased silicon accumulation but also reduced Si remobilization from the vegetative organs.

摘要

适当的养分管理措施是维持良好植物生长发育的决定性因素。无机肥料和稻草的组合可能会影响土壤中的微量营养素。这项研究的目的是确定秸秆还田条件下硅肥对春玉米（Zea mays L.）中硅的积累，分配和迁移的影响。进行了为期两年的田间试验，以研究吉林省在秸秆还田条件下春玉米中硅含量的积累和迁移。我们使用四种处理方法评估了硅的积累和迁移：JS3（秸秆还田+ 45 kg / hm ²硅），WS3（无秸秆还田+ 45 kg / hm ²硅），JS0（秸秆还田+无硅）和WS0（没有秸秆还田+无硅）。实验结果表明，玉米的最高Si积累阶段发生在VT和R2阶段之间。在此阶段，与WS3和WS0处理相比，JS3处理分别平均积聚了20.8％和32.1％的Si。不同器官显示出与整个玉米植株相同的积累趋势，但是在WS0处理中，不同器官中的Si迁移量最高。WS0处理的总硅含量分别比WS3和JS3处理高出42.2％和104.6％，这表明硅肥的施用可以显着增加玉米在植物和器官中的积累。 。