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Background <p>Interspecies interactions play a crucial role in the yield and disease control benefits of intercropping. Plants release allelochemicals that influence the establishment and growth of other species. Diverse intercropping environmental factors combined with various agronomic practices can be critical for regulating interspecies interactions.</p> Methods <p>Field experiments were conducted in a wheat–faba bean intercropping system, incorporating three planting densities, three row spacing configurations, and four nitrogen application levels to identify the optimal planting practices. These findings were validated through pot experiments.</p> Results <p>In the wheat faba bean intercropping system, the combination of D3.5 planting density, R30 row spacing, and an N2 nitrogen application rate (90&#xa0;kg·ha<sup>−1</sup>) resulted in the highest production of DIMBOA and its degradation product MBOA in wheat tissues, leading to optimal crop growth, and significantly enhanced wheat yield and effectively controlled faba bean wilt disease. Correlation analysis revealed that DIMBOA and MBOA contents were positively associated with wheat yield, biomass, and plant height, while exhibiting a negative correlation with the incidence rate and disease index of faba bean.</p> Conclusion <p>Effective crop management practices are essential for promoting wheat and faba bean growth. Benzoxazinoids (BXs) play a pivotal role as the key factors in disease control and yield improvement.</p>

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Crop yield increase and disease control require improved management measures and nitrogen fertilizer application, and Bxs plays an important role

  • 期刊论文

  • 发表日期：

    2025年10月18日

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  • Bijie Hu,
  • Siyin Yang,
  • Huiqiong Ding,
  • Kun Dong,
  • Yan Dong

摘要

Background

Interspecies interactions play a crucial role in the yield and disease control benefits of intercropping. Plants release allelochemicals that influence the establishment and growth of other species. Diverse intercropping environmental factors combined with various agronomic practices can be critical for regulating interspecies interactions.

Methods

Field experiments were conducted in a wheat–faba bean intercropping system, incorporating three planting densities, three row spacing configurations, and four nitrogen application levels to identify the optimal planting practices. These findings were validated through pot experiments.

Results

In the wheat faba bean intercropping system, the combination of D3.5 planting density, R30 row spacing, and an N2 nitrogen application rate (90 kg·ha−1) resulted in the highest production of DIMBOA and its degradation product MBOA in wheat tissues, leading to optimal crop growth, and significantly enhanced wheat yield and effectively controlled faba bean wilt disease. Correlation analysis revealed that DIMBOA and MBOA contents were positively associated with wheat yield, biomass, and plant height, while exhibiting a negative correlation with the incidence rate and disease index of faba bean.

Conclusion

Effective crop management practices are essential for promoting wheat and faba bean growth. Benzoxazinoids (BXs) play a pivotal role as the key factors in disease control and yield improvement.