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The Digestible Nutrients and Metabolizable Energy in Different Silages

North Dakota Agricultural Experiment Station

Abstract

Outline of Experiments

The digestible nutrients and metabolizable energy in certain silages and alfalfa hay were determined by metabolism trials, 10 days in length, using steers from 20 to 24 months of age as experimental animals. The following silages were used: Sweet clover cut in early bloom (S. C. Silage I) and wilted; sweet clover cut in full bloom (S. C. Silage II) and wilted; sunflowers, and corn. In addition to the usual chemical analyses, energy determinations were made with a Parr oxygen bomb calorimeter. The energy of the methane was estimated by means of the factors proposed by Armsby and Fries.¹

Both sweet clover silages were well preserved and, although not relished by the steers at first, they were nevertheless consumed later on in satisfactory amounts. Of the two, the silage from the early cutting appeared slightly more palatable.

Sunflower silage was poor in quality, presumably owing to a killing frost before the sunflowers were cut followed by a rain after cutting, and before ensiling.