By W J Miller
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Extra info for Dairy cattle feeding and nutrition
Likewise, " c u l l " dairy cows are sometimes fattened before being sold for beef. 2. Energy Uses and Requirements 31 The fattening process does not involve the deposition of fat to the exclusion of other substances. But the ratio of fat to other constituents increases as the animal becomes fatter. The energy value of fat is substantially higher than protein; and fatty tissue contains less water than muscle. Thus, the energy deposited in a pound of fat tissue is much greater than in a pound of lean.
Energy Requirements for Maintenance The energy required to maintain dairy cattle is one of the major costs of the dairy industry. Accordingly, considerable research has been conducted to mea sure and describe this key nutritional requirement. The maintenance requirement for energy is that quantity needed to keep the animal at the same size and same tissue composition, without producing any milk or reproducing. In practice, young dairy cattle are growing and possibly pregnant, while cows are lactating and/or pregnant.
Energy for Fattening Although fattening does not have the same role in dairy cattle as with beef cattle, dairy animals are sometimes fattened, either intentionally or as a secon dary effect of other objectives. Generally, high producing cows use some of their body fat to supply energy needs during early lactation and replace it in late lactation or the dry period. In the nutrient requirement tables (see Appendix, Tables 2 and 3), energy over and above that needed for maintenance is recom mended for the dry and pregnant cow during the last two months of gestation.
Dairy cattle feeding and nutrition by W J Miller