By Coulon, J. B. and Garel, J. P. and Landais, E., Productions Animales, INRA, 1989
Description
In a 6-yr feed trial with hay and grass silage diets, each supplemented with concentrates at 2 different levels, 487 lactations of 190 Black Pied and Montbeliard cows were examined. Of 595 health disorders found, lameness and mastitis represented 52 and 24% resp. 47% of mastitis occurred in the first 2 months of lactation. Lameness increased during winter. Recurrent lameness caused highest milk production losses (640 kg for cows with 3 periods of lameness vs. 20 kg for those with 1 period of lameness and 160 kg for cows with 1 period of mastitis) and was more frequent in Black Pied cows and cows fed silage. Cows on silage with low supplementation had a shorter productive life (2.5 vs. 3.2-3.5 lactations) and showed less increase in milk production between 1st and 3rd lactation than cows on silage with high supplementation or cows on hay
In a 6-yr feed trial with hay and grass silage diets, each supplemented with concentrates at 2 different levels, 487 lactations of 190 Black Pied and Montbeliard cows were examined. Of 595 health disorders found, lameness and mastitis represented 52 and 24% resp. 47% of mastitis occurred in the first 2 months of lactation. Lameness increased during winter. Recurrent lameness caused highest milk production losses (640 kg for cows with 3 periods of lameness vs. 20 kg for those with 1 period of lameness and 160 kg for cows with 1 period of mastitis) and was more frequent in Black Pied cows and cows fed silage. Cows on silage with low supplementation had a shorter productive life (2.5 vs. 3.2-3.5 lactations) and showed less increase in milk production between 1st and 3rd lactation than cows on silage with high supplementation or cows on hay
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