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Effect of Varying Alfalfa Hay-Concentrate Ratios in a Pelleted Ration for Dairy Cows

Department of Animal Husbandry, University of California, Davis

ABSTRACT

Pellets containing finely ground alfalfa hay and a grain-type concentrate in various ratios depressed butterfat production below normal. The effect was more marked when the rations contained 30 and 45% of concentrates than when no concentrate or when only 15% was used. The increased energy intakes associated with the higher levels of concentrate feeding were not reflected in increases of energy output as measured by 4% fat-corrected milk, apparently due to lower fat production. Live weight gains were not influenced by differences in energy intake. The health and condition of the cows appeared to be satisfactory during the relatively long period (175 days) of feeding only pellets.