Summary
This controlled pot study evaluated mineral concentrations across 21 pasture species to identify botanical groups and cultivars that could reduce reliance on mineral supplementation in livestock. Wild and cultivated varieties showed no consistent differences in mineral content, but significant variation emerged between botanical groups: forbs were particularly rich in iodine and selenium, grasses in manganese, and legumes in copper, cobalt, zinc and iron. The authors identify six species meriting further investigation in field conditions and multispecies mixtures.
UK applicability
These findings are directly relevant to UK pasture management and livestock nutrition, as mineral deficiencies are common in British livestock systems. However, the pot study results require validation under UK field conditions, in multispecies swards, and across different soil types before farm-level recommendations can be made.
Key measures
Herbage mineral concentrations (Co, Cu, I, Mn, Se, Zn, S, Mo, Fe) in 21 pasture species; comparison of wild-type and cultivated varieties; botanical group analysis (grasses, legumes, forbs)
Outcomes reported
The study measured herbage concentrations of nine minerals (cobalt, copper, iodine, manganese, selenium, zinc, sulphur, molybdenum and iron) across 21 pasture species grown in pots. It identified botanical groups and specific species with elevated mineral profiles suitable for reducing supplementation in livestock diets.
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