Effect Of Varying Levels Of Calcium And Phosphorus In Rations On Mineral Composition Of Japanese Quail Skeleton
The authors investigated the effect of different levels of calcium and phosphorus in the mixed fodder on mineral composition of Japanese quail skeleton. Experimental studies were carried out in the conditions of the Problematic Research Laboratory of Mixed Fodder Additives, National University of Life and Environmental Sciences of Ukraine (Kiev, Ukraine). We selected Japanese quail as the material for scientific and economic experience. The experiment was conducted by groups-analogues method. Fodder was in the dry loose form. The difference in feeding was due to different levels of calcium and phosphorus in the feed for experimental groups. In the beginning of the experiment the experimental quail were similar regards live weight while in the end we did not detect significant difference in their mass. Nevertheless, we observed little decrease in live weight with increasing of phosphorus up to 1.4 % and calcium up to 3.5 %. We fixed that water content in the quail skeletons from Group 4, 5 and 6th study groups (calcium 4.0 %, phosphorus 0.8, 1,1 and 1,4 % respectively) were smaller in comparison with quails from Control, Group 2 and 3 (calcium content 3.5 % with the same level of phosphorus). We also determined increasing of dry matter content in the skeleton by 2.5 – 2.8 % while increasing the content of calcium and phosphorus in mixed fodder of quails-hens (Group 4, 5 and 6). The phosphorus content in quail skeleton depended on the level of phosphorus in the mixed fodder and can be up to 0.39-0.66 % in the bones. The simultaneous increase in the level of phosphorus and calcium in mixed fodder of experimental groups was accompanied by increase in the concentration of calcium and magnesium in the quail skeleton by 0.85–0.87 and 0.01–0.07 per cent respectively.