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[The energy requirement of young female cattle. 2. Substance and energy metabolism].

Authors
  • Schiemann, R
  • Jentsch, W
  • Hoffmann, L
Type
Published Article
Journal
Archiv für Tierernährung
Publication Date
Nov 01, 1987
Volume
37
Issue
11
Pages
971–993
Identifiers
PMID: 3442486
Source
Medline
License
Unknown

Abstract

The second installment of information on studies over several years of the energy requirement of young female cattle comprises data of the feed intake, the digestibility and metabolizability of the rations used as well as the nitrogen and energy balances of the test animals in six experiments with varying rearing intensities, in which the N, C and energy balances as well as rumen physiologic values were measured monthly using the respiration test technique. Of four experiments, measured values are available over the whole rearing period from calf to calving. The results received from 680 interpretable test periods are-separated for the six experiments--arranged in aggregate form according to live weight range in order to characterize the development of nutrient and energy metabolization processes at various rearing intensities. The results form an essential basis for the derivation of the energy requirement of young female cattle according to factorial criteria.

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