Optimizing canopy-spacing configuration increases soybean yield under high planting density

文献类型： 外文期刊

第一作者： Li, Ruidong

作者： Li, Ruidong;Xu, Cailong;Wu, Zongsheng;Xu, Yifan;Sun, Shi;Song, Wenwen;Wu, Cunxiang

作者机构：

关键词： Soybean; Planting density; Row-spacing configuration; Canopy transmittance; Yield

期刊名称：CROP JOURNAL （ 影响因子：5.6； 五年影响因子：6.0 ）

ISSN： 2095-5421

年卷期： 2025 年 13 卷 1 期

页码：

收录情况： SCI

摘要： Dense cropping increases crop yield but intensifies resource competition, which reduces single plant yield and limits potential yield growth. Optimizing canopy spacing could enhance resource utilization, support crop morphological development and increase yield. Here, a three-year study was performed to verify the feasibility of adjusting row spacing to further enhance yield in densely planted soybeans. Of three row-spacing configurations (40-40, 20-40, and 20-60 cm) and two planting densities (normal 180,000 plants ha 1 and high 270,000 plants ha 1 ). The differences in canopy structure, plant morphological development, photosynthetic capacity and their impact on yield were analyzed. Row spacing configurations have a significant effect on canopy transmittance (CT). The 20-60 cm row spacing configuration increased CT and creates a favorable canopy light environment, in which plant height is reduced, while branching is promoted. This approach reduces plant competition, optimizes the developments of leaf area per plant, specific leaf area, leaf area development rate, leaf area duration and photosynthetic physiological indices (Fv/Fm, ETR, Pn). The significant increase of 11.9%-34.2% in canopy apparent photosynthesis (CAP) is attributed to the significant optimization of plant growth and photosynthetic physiology through CT, an important contributing factor to yield increases. The yield in the 20-60 cm treatment is 4.0% higher than in equidistant planting under normal planting density, but 5.9% under high density, primarily driven by CAP and pod number. These findings suggest that suitable row spacing configurations optimize the light environment for plants, promote source-sink transformation in soybeans, and further improve yield. In practice, a 20-60 cm row spacing configuration could be employed for high-density soybean planting to achieve a more substantial yield gain. (c) 2024 Crop Science Society of China and Institute of Crop Science, CAAS. Production and hosting by Elsevier B.V. on behalf of KeAi Communications Co., Ltd. This is an open access article under the CC BY-NCND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

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