This experiment aims to investigate the effects of fermented cottonseed meal replacing soybean meal on the growth performance,serum biochemical indicators,and slaughter performance of broilers.Select 4001-day-old white feather broilers and randomly divide them into 4 groups,with 10 replicates in each group,with 10 chickens per replicate.Using 0%,2%,4%,and 8%fermented cottonseed meal instead of soybean meal in the basic diet as the experimental diet,the experiment lasted for a total of 42 days.The experimental results showed that using 2%fermented cottonseed meal instead of soybean meal in the diet significantly increased the final body weight and average daily gain of broilers(P＜0.05);The use of 8%fermented cottonseed meal instead of soybean meal in the diet significantly reduced the final body weight and average daily gain of broilers(P＜0.05);Compared with the 2%addition group,adding 8%fermented cottonseed meal to the diet significantly increased the feed to weight ratio of broilers(P＜0.05);In addition,using fermented cottonseed meal instead of soybean meal had no significant effect on the average daily feed intake of broilers(P＞0.05).Adding 2%fermented cottonseed meal to the diet significantly increased the serum total protein and albumin content of broilers(P＜0.05);Adding 8%fermented cottonseed meal to the diet significantly increased the activities of serum alanine aminotransferase and alanine aminotransferase in broilers(P＜0.05);In addition,the addition of fermented cottonseed meal to the diet did not significantly affect the serum triglycerides,total cholesterol,and urea nitrogen content of broilers(P＞0.05).Adding 2%fermented cottonseed meal to the diet significantly increased the semi net bore rate,full net bore rate,and leg muscle rate of broilers(P＜0.05);In addition,the addition of fermented cottonseed meal to the diet had no significant effect on the abdominal fat rate and chest muscle rate of broilers(P＞0.05).In summary,under the conditions of this experiment,the optimal amount of fermented cottonseed meal added to broiler feed is 2%.
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