Red clover silage benefits and management for ruminants

Red clover (Trifolium pratense) fixes nitrogen via Rhizobium symbiosis, enhances biodiversity, and provides high-protein feed for ruminants. However, its persistence in boreal swards is limited, often lasting less than two years. In Northern Europe, it is commonly mixed with grasses like timothy, but differing nutrient needs and harvest times complicate management. Growing them as pure stands and combining them in total mixed rations improves diet balancing and reduces nutrient overfeeding. Red clover’s high calcium and crude protein content benefit high-yielding dairy cows but increase milk fever risk in dry cows. Proper ensiling requires formic acid additives due to low dry matter and high buffering capacity. Careful wilting is essential to prevent leaf shatter. In humid climates, low dry matter leads to high-effluent production, requiring proper disposal to prevent environmental harm. Management strategies include avoiding nitrogen fertiliser, delaying first cut, reducing summer cuts, and using crop rotation. The OptiPalko project (Horizon 2020 grant No 101000770) supports sustainable red clover use in Northern Finland.