The Principles of Animal Nutrition; With Special Reference to the Nutrition of Farm Animals

The Principles of Animal Nutrition; With Special Reference to the Nutrition of Farm Animals

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This historic book may have numerous typos and missing text. Purchasers can download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1903 edition. Excerpt: by combustion in the calorimeter, was capable of being metabolized in the body. This method of expressing the results has certain advantages in directness and simplicity, and especially in putting the whole matter on the basis of energy values. In the succeeding paragraphs the available data will be considered from both the standpoints last named. METABOLIZABLE ENERGY OF ORGANIC MATTER. For a discussion of the matter from this standpoint we have to rely almost entirely upon the Mockern investigations already mentioned. In the case of those earlier experiments in which the ration consisted exclusively of a single coarse fodder the computation of the metabolizable energy of the latter is, of course, readily made. In the experiments in which the food under investigation was added to a basal ration the computation is somewhat less simple, it being then necessary to compare the gross energy of the added food with the increase in the energy of the excreta in the second period as compared with the first. The details of both methods will be best explained by illustration. Total Organic Matter. Coarse Fodders. Fed Alone.--For Ox H, fed exclusively on meadow hay, Kellner obtained the following results per day and head: Ingesta. 7,263f grams meadow hay 32,177.3 Cals. Excreta. 2,547 f grams feces 11,750.3 Cals. 13,675 "urine 1,945.0" 158.4" methane 2,113.7" Total excreta 15,809.0" Difference 16,368.3" Had the ration exactly sufficed for the maintenance of the animal, the difference of 16,368.3 Cals. would represent exactly its metabolizable energy. In reality, however, the nitrogen and carbon balance indicated a gain by the animal of 37.2 grams of protein (NX6.00 J) and 140.8 grams of fat, equivalent to 1548.8...
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Product details

  • Paperback | 186 pages
  • 189 x 246 x 10mm | 340g
  • Miami Fl, United States
  • English
  • black & white illustrations
  • 1236552954
  • 9781236552952