Supplementation of Lactic Acid Bacteria Derived from Ensiled Kumpai Tembaga on Live Body Weight, Gastrointestinal Tract, Internal Organs, and Blood Profiles in Pegagan Ducks

Lactic acid bacteria (LAB) are a very potential candidate as probiotics that provide health benefits to the host by improving the intestine microbial balance. This study was performed to investigate the influence concentration of LAB derived from Kumpai Tembaga silage on live body weight, the length and relative weight of the gastrointestinal tract and internal organs, and blood characteristics in Pegagan ducks. One hundred of 7-day-old Pegagan ducks were randomly divided into 5 group treatments and 4 replicates: the first treatment was the control (without LAB), the second to the fifth treatment was LAB supplementation with a concentration of 1x106 , 107 , 108 , and 109 cfu/ml, respectively. Samples were collected at 8 weeks of life to determine the live body weight, length and relative weight of the gastrointestinal tract and internal organs, and hematological and serum biochemical parameters. The administration of LAB with various concentrations improved the live body weight and increased the length and relative weight of the total small intestine, duodenum, jejunum, and caeca. Moreover, LAB supplementation also has a positive effect on lowering the serum level of cholesterol, triglycerides, low-density lipoprotein (LDL), and high-density lipoprotein (HDL), where the higher concentration of LAB resulted in the greater decrease in serum lipids. It can be concluded that the potential of LAB derived from Kumpai Tembaga silage by providing concentrations up to 109 cfu/ml is very considerable, particularly in improving the body weight, enhancing the digestive function, and reducing serum lipid levels in Pegagan duck.