Effects of biosynthetic malic acid supplementation in diet on growth performance and meat quality of broilers under pilot scale test
The study conducted to study the effects of biosynthetic malic acid supplementation in diet on growth performance and meat quality of broilers under pilot scale test,and provide data support for the wide application of biosynthetic malic acid in commercial broiler diets.One thousand one-day-age male broilers were selected and randomly divided into 2 treatments with 10 replicates in each treatment and 50 chickens in each replicate.The control group was fed a corn-soybean meal-based diet.The experimental group was fed the basal diet supplemented with 0.8％biosynthetic malic acid.The feeding trial lasted for 42 d.The results showed that the diets supplemented with 0.8％biosynthetic malic acid had no significant effects on broiler feed intake or mortality rate(P＞0.05),but could effectively increase broiler 42-day weight(11.31％)(P＜0.001)by increasing the average daily weight gain(7.53％)(P=0.001)and reducing the feed conversion ratio(4.47％)(P=0.002)during the finisher phase(22～42 d).Dietary supplementation of biosynthetic malic acid had no significant effects(P＞0.05)on the percentages of eviscerated yield,pectoralis muscle,leg muscle and abdominal fat,and the meat color and pH of pectoralis muscle,while significantly reduced the dripping loss(11.31％)(P＜0.001)of pectoralis muscle.Collectively,under the pilot scale test conditions,dietary supplementation of 0.8％biosynthetic malic acid could effectively improve the growth performance,enhance the water-holding capacity of meat and improve the meat quality of broilers.Therefore,biosynthetic malic acid could be recommended as a feed additive using for commercial broiler diets in the intensive broiler farms.
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