Abstract
Field bean is widely cultivated as a leguminous feed crop and its seed is recognised as a useful protein source. This study examined an additional nutritional dimension: the seed mineral profile, considered alongside key production traits.
Eight field bean genotypes were grown in a Mediterranean environment under low-input management over the 2009–10 and 2010–11 seasons. Mineral composition and yield measurements were compared to identify differences attributable to genotype, season and their interaction.
Mineral variation
Across seasons, Chiaro di Torre Lama contained the highest levels of phosphorus, magnesium, calcium and iron among the material assessed. Sint 6 accumulated the most potassium, while Motta Chiaro 69 recorded the highest zinc concentration.
Season and yield
All genotypes produced higher yields during the wetter second season. Seasonal influence on mineral composition was genotype-specific: phosphorus declined substantially in Chiaro di Torre Lama, Motta Chiaro 69 and Sint 6 during that season, whereas iron concentration in Sint 8 changed little.
The findings indicate that field bean can remain reasonably productive under low-input Mediterranean management while supplying useful mineral content—particularly phosphorus—for feed formulation.
Study context
The work highlights the importance of selecting genotypes for both production and seed composition. Its results can inform field bean improvement and management, while the two-season scope should be considered when applying the findings to other climates, soils or production systems.