Effect of dietary zinc levels on the growth and development of the gilt.

摘要: The effect of dietary Zn levels on the growth and development gilts was studied. Sixty crossbred purebred Yorkshire weighing about 30 kg were allotted by sire into four treatment groups blocked date they farrowed three blocks. treatments, which amounts from Zn0 added to diet, 0, 50, 500 5,000 ppm. Thus, treatments less than NRC nutrient requirement, equal 10 times requirement 100 for a basal corn-soybean meal diet. Weight gain feed efficiency not affected treatment, although there trend receiving ppm weigh after 20 wk. After 4 wk experimental diets, supplemental had elevated serum alkaline phosphatase (SAP) activity levels. SAP tended decline with age animals other treatments. Gilts no supplementary or 50 additional have lower concentrations at 4, 12 study initially. Copper in reduced when fed Zn. These results suggest that tolerate during development, but mineral profiles are altered.