Calcium Chloride as a Regulator of Feed Intake and Weight Gain in Pigs1

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Abstract
Twenty-one crossbred barrows (average weight 62 kg) were individually fed three diets for 42 days: (1) basal, 14% crude protein fortified corn-soy bean meal; (2) basal + 4% CaCl2 · 2H2O + 2.22% Na5P3O10, and (3) diet (2) + 2.03% NaHC03. Diet 2 suppressed daily feed intake and reduced both weight gain and feed efficiency in pigs. It also caused an increase in plasma Cl concentration and a reduction in blood pH and concentrations of HCO3̄, total CO2 and base excess. Feed intake and feed efficiency of pigs fed diet 3 were similar to those of pigs fed diet 1. Weight gain of pigs fed diet 3 was higher than that of pigs on diet 2 but lower than that of pigs fed diet 1. Diet 3 produced a higher plasma Cl concentration than diet 1 but a lower concentration than diet 2. However, blood pH and concentrations of HCO3̄, total CO2 and base excess in pigs fed diet 3 were similar to those in pigs fed diet 1. It is concluded that ingestion of CaCl2 increases plasma Cl concentration, which exceeds the bicarbonate buffering power capacity and produces a metabolic acidosis, thereby appearing to suppress appetite in pigs. Copyright © 1981. American Society of Animal Science . Copyright 1981 by American Society of Animal Science.

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