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Effect of feeding silage from direct cut or wilted grass and hay upon food intake, digestibility, milk production and blood composition in dairy cows



Effect of feeding silage from direct cut or wilted grass and hay upon food intake, digestibility, milk production and blood composition in dairy cows



Arch Tierernahr 17(1/2): 119-129



In a 100-day feeding and metabolism experiment involving 9 dairy cows a comparison was made between half-dried silage (40% dry matter) succulent silage (20% dry matter) and pasture hay (artificially dried). During the 1st 50-day period (a) the ration consisted of fodder concentrates, fodder beets (2 kg dry matter per day/animal) and silage of hay; during the 2nd period (b) the fodder beets were omitted from the ration. The amount of dry matter (in gm) consumed per kg live weight 0. 75 was highest with half-dried silage (a. 143; 120 or 130 gm) (b: 136; 108 or 130 gm). The same results were obtained in experiments testing the net energy uptake per kg 0. 75 (a: 145; 131 or 137 kcal; b: 129; 112 or 126 kcal). Half-dried silage was in no way inferior to hay if fed in combination with fodder concentrates (a: 18. 27; 15. 32 or 17. 83 kg FCM [Fat Corrected Milk]; b: 15. 58 13. 25 or 14. 67 kg FCM). If fodder beets were omitted from the diet the decrease in the net energy uptake per kg 0. 75 was more pronounced with the feeding of silage (12-14%) than with the feeding of hay (8%); the digestibility of nitrogen-free extracts (a: 76, 78, 77%; b: 74, 74, 71%) and the percentage of lactose in milk were reduced (by about 0. 2%). Products of grass conservation did not affect the Ca, P, Mg, glucose and acetone content of the blood.

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Effect of silage from fresh or wilted grass or hay on feed intake, digestibility, milk yield and blood composition of dairy cows. Arch. Tierernahrung. 17: 119-129, 1967

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