Effect of high-salt drinking water on growth performance,organ index and serum antioxidant index of broilers
The effects of high-salt drinking water on growth performance,organ index and serum antioxidant index of broilers were studied by adding different doses of sodium chloride(NaCl)to drinking water.260 one-day-old broilers were selected.After feeding to 7-day-old,240 chickens with balanced weight and good mental state were randomly divided into four groups with three replicates in each group and 20 feathers in each replicate.No NaCl was added to the drinking water of the control group,but 1,2,3 g/L NaCl was added to the drinking water of each experimental group.The results showed that on the 28th day of the experiment,the average daily water consumption and feed-weight ratio of broilers in the three experimental groups were significantly higher than those in the control group(P<0.05).With the increase of NaCl concentration in drinking water,the average daily gain of broilers decreased significantly(P<0.05).Liver weight in T3 group was significantly lower than that in the control group(P<0.05).With the increase of NaCl concentration in drinking water,the mortality of broilers increased.The spleen weight and spleen index of each experimental group were significantly lower than those of the control group(P<0.05).Cardiac hypertrophy was found in all three groups,and the cardiac index of T2 group and T3 group reached the range of ascites syndrome.The activities of serum glutathione peroxidase(GSH-Px),total superoxide dismutase(T-SOD),and total antioxidant capacity(T-AOC)of broilers in each experimental group were significantly lower than those in the control group(P<0.05),while the contents of serum malondialdehyde(MDA)in T2 group and T3 group were significantly higher than those in the control group(P<0.05).The study indicates that adding more than 1 g/L NaCl in drinking water can decrease the growth performance of broilers,increase the feed-to-weight ratio,and reduce the immune organ index and antioxidant performance.
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