Authors : Trinh Thi Hong Nguyen, Metha Wanapat and Thao The Nguyen
Abstract: The objective of this study was to determine the effect of mangosteen peel, garlic and urea pellet supplementation on rumen fermentation and microbial protein synthesis of beef cattle. Four crossbred (Brahman x Holstein) beef cattle were randomly assigned according to a 4x4 Latin square design to receive four dietary treatments of different mangosteen peel pellets in concentrate. The treatments were as follows: T1, none supplementation; T2, supplementation with mangosteen peel pellet at 200 g/head/day (Mago-pel); T3, supplementation with mangosteen peel and garlic pellet at 200 g/head/day (Mago-pic) and T4, supplementation with mangosteen peel, garlic and urea pellet at 200 g/head/day (Mago-ulic). Rice straw was offered at ad libitum and concentrate was fed at 0.5% of BW. The results were found that total DMI and digestibility of DM and CP were not significantly affected by pellet supplementation whereas digestibility of NDF and ADF were higher in the pellet supplementation than in the control (p<0.05), ruminal temperature, pH, NH3-N, total VFA and butyrate were similar among treatments although NH3-N tended to be higher in supplemental treatments and the highest was in Mago-ulic supplemental treatment. There was significantly different in propionate production (p<0.05) between treatments in which the highest was in Mago-ulic supplementation. In addition, the acetate, acetate to propionate ratio and methane production were reduced, bacterial population was increased and the highest was in Mago-ulic treatment. In contrast, protozoal population was reduced while fungal zoospores were not affected by feed supplementation. Microbial protein synthesis was increased by pellet supplementation although there was not significantly different between Mago-pel and control. In this study, supplementation of Mago-ulic at 200 g/head/day has shown the greatest for improving rumen fermentation, microbial protein synthesis and lower protozoa population in beef cattle.
Trinh Thi Hong Nguyen, Metha Wanapat and Thao The Nguyen, 2012. Effect of Mangosteen Peel, Garlic and Urea Pellet Supplementation on Rumen Fermentation and Microbial Protein Synthesis of Beef Cattle. Agricultural Journal, 7: 95-100.