Nutritive Value of the Dairy Cattle Ration as Affected by Different Levels of Urea and Quality of Ingredients

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Abstract
Comparison of the nutritive values of low-fiber and high-fiber concentrate mixtures containing 0, 10, 20, and 40 lb/ton urea fed with late-cut and early-cut mixed grass hays were made with six non-pregnant dairy animals. The results of the experiment indicate that the heat increment of the high-fiber ration decreased as the level of urea in the concentrate mixture increased when early-cut hay was used as the forage.