Calcium, magnesium and phosphorus retention in young chicks
2001
Zelenka, J. | Fajmonova, E. (Mendelova Zemedelska a Lesnicka Univ., Brno (Czech Republic). Agronomicka Fakulta)
Utilisation of calcium, magnesium and phosphorus was examined in broilers and laying type cockerels from Day 3 to Day 22. Differences between the birds with and without deutectomy were also studied. Utilisation of Ca and Mg increased very quickly and reached its maximum at 14 days of age. In intact chicks coefficients of apparent phosphorus retention decreased while in deutectomized ones they increased till the age of 13 days; thereafter, a decrease was recorded. Retention of calcium per 1 g of weight gain in chicks with and without yolk sacs increased till Day 16-17 and during the whole period, respectively. Retention of phosphorus increased till Day 14 and till the end of experiment, respectively. Content of magnesium in weight gains culminated on Day 13-14. Concentration of phosphorus in weight gains in chiks with and without yolk sacs increased till Day 14 and till the end of experiment, respectively. Differences in Ca, Mg and P retention per unit of weight gain in laying type hybrids and in broiler chicks were not significant.
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