Effects of different proportions of chili straw silage as a replacement for corn straw on growth performance,nutrient digestibility,and serum biochemical indices of beef cattle
This study aimed to investigate the impact of replacing corn straw with various proportions of chili straw silage in the basic diet on the growth performance,nutrient digestibility,and serum biochemical indices of beef cattle.Eighteen adult beef cattle with similar weight and age were selected from 3 farms and divided into 6 groups with 3 beef cattle in each group.The control group was fed the basal diet,while trial groups Ⅰ,Ⅱ,Ⅲ and Ⅳ were fed diets with 25％,50％,75％and 100％chili straw silage as a substitute for corn straw,respectively.The feeding period lasted for 90 days.The results revealed that the total weight gain,average daily gain and average daily feed intake of trial group Ⅱ were the highest,and the ratio of feed to gain was the lowest.The total weight,average daily gain and average daily feed intake of trial group Ⅱ were increased by 40.99％,41.28％and 19.50％compared with control group,respectively(P＜0.05).The apparent digestibility of dry matter,crude protein,neutral detergent fiber and the contents of total cholesterol and blood sugar in serum were increased by 17.16％,15.10％,35.21％,14.87％and 47.09％compared with control group,respectively(P＜0.05).No significant differences were observed among the groups in terms of the apparent digestibility of calcium and phosphorus,as well as the serum levels of total protein,albumin,globulin,urea nitrogen,alanine aminotransferase,and triglyceride(P＞0.05).Overall,the results indicated that replacing corn straw with chili straw silage in the basal diet could effectively enhance the appetite and improve the production performance of beef cattle.The replacement at 50％demonstrated the most favorable effects,leading to significant improvements in the apparent digestibility of dry matter,crude protein,and neutral detergent fiber,thereby increasing rumen microbial protein synthesis and serum albumin content.Importantly,this dietary modification did not cause any damage to liver and kidney functions.
beef cattlechili straw silagegrowth performanceapparent digestibilityserum biochemical indices
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