Summary
This field experiment demonstrates that increasing crop diversity through intercropping (wheat, faba bean, linseed, and oilseed rape in 2–3 species mixtures) significantly enhanced arthropod abundance and diversity under both low- and high-input management, whilst maintaining or improving crop biomass. Crop mixtures containing legumes or mass-flowering crops supported particularly rich arthropod communities and complex flower visitor networks. The findings suggest intercropping can provide a landscape-scale ecological benefit—potentially enabling 1.5 million additional flower visits per hectare—without yield penalties, offering a practical mechanism to counteract insect declines in intensified agriculture.
UK applicability
The crop species tested (wheat, faba bean, linseed, oilseed rape) and temperate arable conditions are directly relevant to UK farming systems. The results support the integration of intercropping into UK arable rotations as a biodiversity-enhancing, agronomically viable practice that aligns with agri-environment and integrated pest management policy objectives.
Key measures
Arthropod abundance and diversity; flower visitor network complexity; crop biomass; agrochemical input (high vs. low); crop diversity (1–3 species, fallows); flower visits per hectare
Outcomes reported
The study measured arthropod abundance, diversity, and flower visitor network complexity across different crop diversity levels (1–3 species mixtures) and agrochemical input regimes. Crop biomass was also quantified to assess yield trade-offs.
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