Drinking water quality. II: Effects on productive performance of layers during summer.

Samples of water were taken from different watering sources (commercial, Nile and well). Physical, chemical and bacteriological analysis of samples revealed that, levels of salinity, hardness, alkalinity, Ca, Mg, Na and K in the well water were higher than those in the Nile and commercial water. Higher levels of sulphate and chloride were found in the commercial water. Total bacterial count was higher in the Nile water than in the commercial and well water. An experiment was carried out to detect the effects of different sources of water on productive performance of layers during summer season. Well's water significantly (P 0.05) on water and feed consumption, water/feed consumption ratio, egg weight, change in body weight, Potassium, calcium, magnesium and inorganic phosphorous concentrations of the plasma.