Borges, S. A. [UNESP]Fischer Da Silva, A. V. [UNESP]Ariki, J. [UNESP]Hooge, D. M.Cummings, K. R.2014-05-272014-05-272003-03-01Poultry Science, v. 82, n. 3, p. 428-435, 2003.0032-5791http://hdl.handle.net/11449/67204Ross male broiler chicks (n = 480) on new litter were used in a randomized block design with two blocks (environmental rooms) and four treatments having four replicate pens (1.0 × 2.5 m; 15 chicks) each to evaluate dietary electrolyte balance (DEB; P < 0.05). Two rooms were 1) thermoneutral (Weeks 1 through 6, with decreasing maximum from 32 to 25°C and minimum from 28 to 19°C; relative humidity 49 to 58%) and 2) cyclic daily heat stress (Weeks 1 and 2, thermoneutral; Weeks 2 through 6, maximum temperatures 35, 35, 33, and 33°C, respectively; and minimum temperatures 23, 20, 19, and 19°C, respectively; relative humidity 51 to 54%). The DEB treatments (0, 140, 240, or 340 mEq Na + K - Cl/kg) had NaHCO3 plus NH4Cl, or KHCO3, or both added to corn-soybean meal mash basal diets with 0.30% salt (NaCl). In the thermoneutral room, DEB 240 increased 42-d weight gain and 44-d lymphocyte percentage and decreased heterophil percentage and heterophil to lymphocyte ratio compared to the DEB 40 treatment. The DEB 240 diets had 0.35 and 0.35% Na and 0.37% and 0.29% Cl in starter (0.75% K) and grower (0.67% K) diets, respectively. No DEB treatment differences were found in the heat stress room. For combined rooms, 42-d feed intake was higher for DEB 240 than for DEB 40. The 21-d weight gain was higher for DEB 240 than for DEB 40 or 140; and 21-d feed/gain was lower for DEB 40 than for DEB 340. The predicted maximum point of inflection for 21- and 42-d weight gains were DEB 250 and 201, with highest 42-d feed intake at 220.428-435engBroilerChlorideDietary electrolyte balanceHeat stressSodiumGallus gallusGlycine maxZea maysammonium chloridebicarbonatechlorideelectrolytepotassium bicarbonatepotassium derivativeanimalchickendieteatingenergy metabolismheathumiditymaizemalepHphysiologypotassium intakeregression analysissodium intakesoybeanstressweight gainAmmonium ChlorideAnimalsBicarbonatesChickensChloridesDietEatingElectrolytesEnergy MetabolismHeatHumidityHydrogen-Ion ConcentrationMalePotassium CompoundsPotassium, DietaryRegression AnalysisSodium BicarbonateSodium, DietarySoybeansStressWeight GainArtigo10.1093/ps/82.3.428WOS:000181757400013Acesso restrito2-s2.0-0037872264