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Yield advantage and carbon footprint of oat/sunflower relay strip intercropping depending on nitrogen fertilization

Publikation: Bidrag til tidsskrift/Konferencebidrag i tidsskrift /Bidrag til avis › Tidsskriftartikel › Forskning › peer review

DOI

  • Xin Qian, Shandong Academy of Agricultural Sciences, China Agricultural University
    • ,
  • Jie Zhou, China Agricultural University
    • ,
  • Bolun Luo, China Agricultural University
    • ,
  • Hongcui Dai, Shandong Academy of Agricultural Sciences
    • ,
  • Yuegao Hu, China Agricultural University
    • ,
  • Changzhong Ren, Baicheng Academy of Agricultural Sciences
    • ,
  • Leanne Peixoto
    • ,
  • Laichun Guo, Baicheng Academy of Agricultural Sciences
    • ,
  • Chunlong Wang, Baicheng Academy of Agricultural Sciences
    • ,
  • Kazem Zamanian, Leibniz University Hannover
    • ,
  • Baoping Zhao, Inner Mongolia Agricultural University
    • ,
  • Huadong Zang, China Agricultural University
    • ,
  • Zhaohai Zeng, China Agricultural University

Purpose: Increasing crop yield to ensure global food security while decreasing carbon footprint (CF) is a challenge for sustainable agriculture. Although intercropping is suggested as a potential pathway in this regard, the balance between yield advantage and CF is unclear, especially under different nitrogen (N) application rates. Methods: A two-year field experiment was conducted to investigate the effect of oat/sunflower intercropping and N application rates (0, 50, 100, and 150 kg ha−1) on yield advantages, N uptake, and CF. Results: The overall land equivalent ratio of oat/sunflower intercropping decreased from 1.33 to 1.07 with increasing N fertilization, which implies the potential N reduction to maintain crop yield. Without fertilization, the yield advantage of intercropping was 28–32% and 18–47% higher for oat and sunflower, respectively compared with corresponding monocultures. However, this yield advantage decreased with increasing fertilization, especially for oat. The border rows contributed more than one-third of the yield for intercropped oat without N fertilization, but their contribution decreased with increasing N fertilization. However, the contribution of border rows to intercropped sunflower yield was independent of N fertilization and remained around 69–75%. Overall, oat/sunflower relay strip intercropping maximizes the productivity by border row effects due to reduced N fertilization demand. Furthermore, intercropping decreased the CF relative to monoculture, especially without N fertilization. Conclusion: Intercropping can act as a win–win strategy for sustainable agriculture in Northwest China with higher productivity and lower carbon footprint.

OriginalsprogEngelsk
TidsskriftPlant and Soil
Vol/bind481
Nummer1-2
Sider (fra-til)581-594
Antal sider14
ISSN0032-079X
DOI
StatusUdgivet - dec. 2022

Bibliografisk note

Funding Information:
We are grateful for the financial support from the earmarked fund for China Agriculture Research System (CARS-07-B-5), the Science and Technology Key Program of Inner Mongolia (2021SZD0017), and the Joint Funds of the National Natural Science Foundation of China (U21A20218). Contribution of Hongcui Dai was supported by the funding for Study Abroad Program by the Government of Shandong Province. We also thank Chen Wang, Qisheng Yang, and members of the Baicheng Academy of Agricultural Sciences for their field experiment assistance.

Funding Information:
We are grateful for the financial support from the earmarked fund for China Agriculture Research System (CARS-07-B-5), the Science and Technology Key Program of Inner Mongolia (2021SZD0017), and the Joint Funds of the National Natural Science Foundation of China (U21A20218). Contribution of Hongcui Dai was supported by the funding for Study Abroad Program by the Government of Shandong Province. We also thank Chen Wang, Qisheng Yang, and members of the Baicheng Academy of Agricultural Sciences for their field experiment assistance.

Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer Nature Switzerland AG.

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