Supplementation of Yeast Fermented Cassava Chip (YFCC) Replace Concentrate on Rumen Ecology and Average Daily Gain in Crossbred สิทธิศักดิ์ คำผา, อุทัย โคตรดก, พิชาด เขจรศาสตร์, กรุง วิลาชัย, นัดติยา ด่านโอภาส, วันทนีย์ พลวิเศษ และ กันตภณ ทาระเวท

Abstract

Six, female one year old crossbred Brahman cattle with initial body weight of 250±10 kg were randomly divided into two groups and received concentrate at 12 %CP (T1), and cassava chip fermented yeast (CCFY) (T2). The animals were offered the treatment concentrate at 1.5 %BW and rice straw was fed ad libitum. Means were compared using Group T-test. All animals were kept in individual pens and free access to clean water and mineral blok. The results have revealed that supplementation of CCFY replacement of concentrate on total feed intake was non-significantly different average at 9.1 kg/hd/day (T1) and 8.7 kg./hd/day (T2) or (2.9 and 2.8 %BW, respectively). While average daily gain (ADG) was non-significantly different average at 550 g/day (T1) and 542 g/day (T2), respectively. In addition, the ruminal pH, ammonia-nitrogen and blood urea nitrogen concentration were non-significantly different (p>0.05) which in optimum levels. Supplementation of CCFY (T2) could improve population of bacteria and fungal zoospore, but not decreased populations of Holotrich and Entodiniomorph protozoa in the rumen. The results indicated that supplementation of cassava chip fermented yeast (CCFY) as alternative replacement concentrate at 12 %CP could improve ruminal fermentation efficiency, microorganism populations and no negative effects on average daily gain in crossbred Brahman cattle.