Effect of mixes with different quantities and ratio of calcium and phosphorus on production results of weaned piglets
2000
Gavric, B. (Poljoprivredni fakultet, Beograd - Zemun (Yugoslavia)) | Hristov, S. | Sinovec, Z.
In this study, all experimental groups were fed mixes of standard raw material and chemical composition which corresponded to the age of the piglets. The difference between the groups was in the quantity and ratio of calcium and phosphorus in the mixes. Feed for the control group of piglets contained recommended levels (0.84% Ca and 0.66% P) and ratio (1.3:1) of Ca and P. Mixes for experimental groups 1, 2 and 3 contained 22, 43 and 66% higher quantities of calcium, with a constant phosphorus content, sa that the Ca:P ratio in these mixes was 1.59:1, 1.87:1 and 2.18:1, respectively. Mixes for experimental groups 4, 5 and 6 contained 22, 43 and 66% higher quantities of calcium, with a corresponding increase in phosphorus content, so that the Ca:P ratio in these mixes was 1.3:1, or identical as in the control group. Using mixes with calcium or calcium and phosphorus content which is higher than recommended values did not cause health disorders, in particular in the locomotor system, or deaths. Higher calcium content up to 1.3%, with constant phosphorus content, resulted in better production results, and a corresponding increase in phosphorus content, with a constant ratio of Ca:P, achieved significantly better results. The recommended quantities of calcium and phosphorus and those prescribed under sublegal acts for piglet mixes are not sufficient to meet requirements. The best results are achieved in raising piglets when mixes with 1.2-1.3% calcium and 0.9-1.0% phosphorus is used, with a ratio of 1.3:1.
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