| Autor: |
Gerhard Flachowsky, W. I. Ochrimenko, D. Geinitz, G. H. Richter |
| Rok vydání: |
1989 |
| Předmět: |
|
| Zdroj: |
Archiv für Tierernaehrung. 39:345-359 |
| ISSN: |
0003-942X |
| DOI: |
10.1080/17450398909429538 |
| Popis: |
The influence of different Ca- and/or P-supply on metabolic parameters and Ca-resp. P-balance was tested in 12 balance trials with mature wethers at different feeding regimes. Furthermore the influence of dietary Ca-excess on metabolic parameters and fattening performance of bulls was also tested. Increasing the P-intake at normal Ca-supply (Ca/P-ratio 1:1.7 ... 3.6) or at Ca-excess (Ca/P-ratio approximately 1.6:1) led to a higher P-concentration in blood and urine and lowered the Ca-content in serum as well as the apparent Ca-balance. These effects were greater in the ration rich in concentrate than in the ration rich in roughage. Increasing the dietary Ca-intake (Ca/P-ratio approximately 3.6:1) had no influence on metabolic parameters of wethers. In a vitamin-D-deficiency trial the Ca supplementation (Ca/P-ratio approximately 4.2:1) improved the performance of bulls and retarded the incidence of signs of rickets (lower feed intake, higher concentration of alkaline phosphatase in serum, lower bone mineralisation) for about 100 days compared with the control group (Ca/P ratio: 1.2:1). |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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