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Responses of Branch Number and Yield Component of Soybean Cultivars Tested in Different Planting Densities

Author

Listed:
  • Cailong Xu

    (Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Soybean Industrial Technology R & D Center, Beijing 100081, China)

  • Ruidong Li

    (Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Soybean Industrial Technology R & D Center, Beijing 100081, China
    School of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China)

  • Wenwen Song

    (Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Soybean Industrial Technology R & D Center, Beijing 100081, China)

  • Tingting Wu

    (Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Soybean Industrial Technology R & D Center, Beijing 100081, China)

  • Shi Sun

    (Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Soybean Industrial Technology R & D Center, Beijing 100081, China)

  • Shuixiu Hu

    (School of Agronomy, Jiangxi Agricultural University, Nanchang 330045, China)

  • Tianfu Han

    (Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Soybean Industrial Technology R & D Center, Beijing 100081, China)

  • Cunxiang Wu

    (Institute of Crop Sciences, Chinese Academy of Agricultural Sciences/National Soybean Industrial Technology R & D Center, Beijing 100081, China)

Abstract

Increasing planting density is one of the key management practices to enhance soybean yield. A 2-yr field experiment was conducted in 2018 and 2019 including six planting densities and two soybean cultivars to determine the effects of planting density on branch number and yield, and analyze the contribution of branches to yield. The yield of ZZXA12938 was 4389 kg ha −1 , which was significantly higher than that of ZH13 (+22.4%). In combination with planting year and cultivar, the soybean yield increased significantly by 16.2%, 31.4%, 41.4%, and 46.7% for every increase in density of 45,000 plants ha −1 . Yield will not increase when planting density exceeds 315,000 plants ha −1 . A correlation analysis showed that pod number per plant increased with the increased branch number, while pod number per unit area decreased; thus, soybean yield decreased. With the increase of branch number, the branch contribution to yield increased first, and then plateaued. ZH13 could produce a high yield under a lower planting density due to more branches, while ZZXA12938 had a higher yield potential under a higher planting density due to the smaller branch number and higher tolerance to close planting. Therefore, seed yield can be increased by selecting cultivars with a little branching capacity under moderately close planting.

Suggested Citation

  • Cailong Xu & Ruidong Li & Wenwen Song & Tingting Wu & Shi Sun & Shuixiu Hu & Tianfu Han & Cunxiang Wu, 2021. "Responses of Branch Number and Yield Component of Soybean Cultivars Tested in Different Planting Densities," Agriculture, MDPI, vol. 11(1), pages 1-12, January.
    • Handle: RePEc:gam:jagris:v:11:y:2021:i:1:p:69-:d:481290
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    2. Xinyue Ran & Jianguo Zhou & Tingyong Mao & Shu Wu & Quanzhong Wu & Guodong Chen & Yunlong Zhai, 2023. "The Effect of Plant and Row Configuration on the Growth and Yield of Multiple Cropping of Soybeans in Southern Xinjiang, China," Sustainability, MDPI, vol. 15(19), pages 1-18, October.
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