Highlights
- Potassium nutrient management in maize-soybean strip intercropping can increase the resource use efficiency.
- Compared to the T₀ (no potassium), T₂ (80 kg ha^–1 on maize) application increases the light interception and leaf area index of maize by 17% and 38% respectively.
- Regression analysis reveals a positive relationship between physiological parameters measured at R₂ and at R₆ growth stages in maize under maize-soybean strip intercropping.
- High K₂O (80 kg ha^–1) inputs enhanced the partitioning of biomass production in maize.
- Overall, the optimum K₂O application increased the maize yield by 16% under maize-soybean strip intercropping system relative to control.

Globally, maize is an essential food and fodder crop. Fertilisers, as soil amendments, particularly K₂O, could increase maize yields. A Two-year field research was designed in 2018- 2019 to examine the influence of three-potassium fertiliser applications on maize-soybean strip intercropping and sole-maize yield components. A Randomized complete block design with three replications was used, and one of three K₂O doses (T₀, 0; T₁, 40:30; T₂, 80:60 kg ha^–1) was given in each plot. The effects K₂O treatments on photosynthetic characteristics, photosynthetic active radiation, leaf area index, total biomass accumulation, and seed yield were investigated at V₆, R₂, R₄, and R₆. Compared to T₀, maize-soybean strip intercropping system and sole-maize results showed T₂ maize enhanced the light interception by 14, 26, 15, and 17% at V₆, R₂, R₄, and R₆ respectively. Maize increased the partitioning of biomass to cob and seed by 8 and 10% at R₆, respectively in T₂, relative to T₀ treatment. T₂ showed a higher green leaf area than T₀; K₂O applications led to an enhancement in leaf area index at R6 by 38%, under T₂, and subsequently increased the photosynthetic rate at R₄ and R₆ by 8% and 6% respectively, in both years of the study. These results suggest that we may increase the accumulation of biomass and the yield of the maize seed under maize-soybean strip intercropping system and sole-maize by optimum K application in maize plants.

要点
-玉米-大豆地带间作中钾的养分管理可以提高资源利用效率。
-与T ₀（无钾）相比，T ₂（玉米80 kg ha ^–1）的施用使玉米的光截获率和叶面积指数分别提高了17％和38％。
-回归分析揭示了在玉米-大豆地带间作条件下，在玉米的R ₂和R ₆生长阶段测得的生理参数之间存在正相关关系。
-高K ₂ O（80 kg ha ^–1）的投入促进了玉米生物量生产的分配。
-总的来说，最佳K ₂相对于对照，在玉米-大豆条间作系统下，O的施用使玉米产量增加了16％。

在全球范围内，玉米是必不可少的粮食和饲料作物。肥料，作为土壤改良剂，尤其是K ₂ O，可以增加玉米产量。在2018-2019年进行了为期两年的田间研究，以研究三钾肥施用对玉米-大豆条间作和单一玉米产量构成的影响。使用完全随机区组设计，重复三次，并且三个ķ一个₂ ö剂量（T ₀，0;吨₁吨;，40:30 ₂，80:60公斤公顷^-1）的每个图中给出。在V下研究了K ₂ O处理对光合特性，光合活性辐射，叶面积指数，总生物量积累和种子产量的影响。₆，R ₂，R ₄和R ₆。与T ₀相比，玉米-大豆带间作系统和单一玉米的结果表明，T ₂玉米分别在V ₆，R ₂，R ₄和R ₆处将光的拦截提高了14％，26％，15％和17％。相对于T ₀处理，玉米在T ₂处的R _6处分别增加了8％和10％的生物量分配给穗轴和种子。T _2的绿叶面积比T _0高; 钾₂在两年的研究中，O的施用导致在T ₂下R6的叶面积指数提高了38％，随后在R ₄和R ₆的光合速率分别提高了8％和6％。这些结果表明，通过在玉米植株中最佳施钾，在玉米-大豆带间作系统和单一玉米下，我们可以增加生物量的积累和玉米种子的产量。