Effect of electrolyte balance on the performance of growing-finishing swine

Haydon, K.D.; West, J.W.; McCarter, M.N.; Newton, G.L.

Special Publication Georgia College of Agricultural Experiment Stations 67: 33-38


Accession: 002081963

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In a growing-finishing trial during the summer (average daily maximum/minimum ambient temperature for grower and finisher phases 94.3 degrees /73.9 degrees F and 90.3 degrees /72.7 degrees F, respectively) 96 crossbred pigs, 48 lb, were given maize-soyabean meal diets containing electrolyte balance (EB = Na + K - Cl) 25, 100, 175, 250, 325 or 400 meq/kg. Increasing electrolyte balance linearly increased average daily feed intake and gain of pigs during the growing phase (48 to 110 lb) and when measured over the entire growing-finishing period (40 to 230 lb). Analyses of data indicated that optimal gain and feed intake was obtained when the diet contained electrolyte balance 250 meq/kg. Increasing dietary electrolyte balance increased blood pH, total carbon dioxide, bicarbonate concentration and base excess indicating an improved acid-base blood buffering capacity. Results indicate improved performance of pigs with increasing dietary electrolyte balance when fed at high ambient temperature with no supplemental cooling.