Studies on the use of lucerne silage source for high-milk-producing dairy cows

Journal of Animal Physiology and Animal Nutrition
M BulangM Rodehutscord

Abstract

Studies on the use of lucerne silage as a forage source for high-yielding dairy cows. It was the main objective of this study to investigate effects of lucerne silage inclusion in maize silage-based rations on dry matter intake, milk yield and metabolic parameters of high yielding dairy cows. Three total mixed rations (TMR) were used. They contained as the main forage source on a dry matter basis 41.5% maize silage and 12% grass silage (ration maize) or 18% maize silage and 29% of either grass silage (ration grass) or lucerne silage (ration lucerne). Organic matter digestibility, determined with wether sheep, was 77 and 65% for the grass and the lucerne silage, respectively. Each TMR was fed to 4 wether sheep to determine crude nutrient digestibilities. The content of net energy for lactation (NEL), as calculated from digestible crude nutrients, was (MJ/kg dry matter (DM)): 7.1 (maize), 7.2 (grass) and 6.8 (lucerne). Based on the results of a chemical fractionation of crude protein it was calculated that the content of utilisable crude protein (nXP) was not below 167 g/kg DM and that the N balance in the rumen was not negative for all 3 TMR. The TMR were fed for 169 days to at least 28 dairy cows per treatment which were in the...Continue Reading

References

Jul 1, 1990·Domestic Animal Endocrinology·R W Canfield, W R Butler
May 1, 1997·Journal of Dairy Science·J E Nocek
Oct 6, 1997·Journal of Dairy Science·T R Dhiman, L D Satter
Mar 11, 1998·Journal of Dairy Science·P C HoffmanM D Casler
Jul 25, 2000·Journal of Dairy Science·K L Ingvartsen, J B Andersen

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