The use of a microbial phytase in the diet improves the bioavailability of phytate phosphorus and calcium utilization, therefore, the amount of inorganic P that must be added to meet the available P requirement is reduced. Common dietary sources of calcium and phosporus. Remarks Calcium carbonate 38.5 0.02 Good availability, usually a cheap source of Ca. Meat and bone meal 9.4 4.58 Availability varies, but usually good. Monocalcium phosphate 17 21.1 Good availability, levels may vary.
Sodium chloride is commonly deficient in swine rations.
If milk by-products such as dried whey or skim milk are used, salt concentrations could be reduced. Salt cannot be stored in the body to any great extent, so consumption above daily needs must be excreted. Salt deficiency results in a reduction in rate and efficiency of growth. Salt toxicity can be caused by dehydration is access to fresh water is unavailable or restricted. Signs of salt toxicity include nervousness, weakness, staggering, epileptic seizures, paralysis and death.