Kang Sungchhang, Wanapat Metha, Viennasay Bounnaxay
Agricultural Unit, Department of Education, National Institute of Education, Phnom Penh, Cambodia.
Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand.
Trop Anim Health Prod. 2016 Dec;48(8):1673-1678. doi: 10.1007/s11250-016-1142-2. Epub 2016 Sep 13.
The objective of this study was to evaluate the effects of banana flower power pellet (BAFLOP-pellet) and plant oil source on in vitro gas production, fermentation efficiency, and methane (CH) production. Rumen fluid was collected from two rumen-fistulated dairy steers fed on rice straw-based diet with concentrate supplement to maintain normal rumen ecology. All supplemented feed were added to respective treatments in the 30:70 roughage to concentrate-based substrate. The treatments were arranged according to a 3 × 3 factorial arrangement in a completely randomized design. First factor was different levels of BAFLOP-pellet supplementation (0, 30, and 60 g/kg of dietary substrate) and second factor was plant oil source supplementation [non-supplemented, 20 g/kg krabok seed oil (KSO), and 20 g/kg coconut oil (CO) of dietary substrate, respectively]. Under this investigation, BAFLOP-pellet supplementation increased gas production kinetics and in vitro digestibility (P < 0.05). Ruminal pH was dropped post incubation time in the non-supplemented group but was enhanced in BAFLOP-pellet-supplemented treatments. On the other hand, supplementation of KSO and CO depressed gas production and digestibility, but did not influence ruminal pH. In addition, protozoal population and CH production were decreased by BAFLOP-pellet and plant oil addition (P < 0.05). Based on this study, it could be concluded that supplementation of BAFLOP-pellet and plant oil source could enhance the in vitro fermentation efficiency while reduced protozoal population and CH production. It is suggested that BAFLOP-pellet (60 g/kg of dietary substrate) and KSO/CO (20 g/kg of dietary substrate) could be used to manipulate rumen fermentation characteristics fed on high-concentrate diet.
本研究的目的是评估香蕉花粉末颗粒（BAFLOP颗粒）和植物油源对体外产气、发酵效率和甲烷（CH）产生的影响。从两只装有瘤胃瘘管的奶牛中采集瘤胃液，这些奶牛以稻草为基础日粮并补充精料，以维持正常的瘤胃生态。所有补充饲料均以30:70的粗饲料与精料比例添加到各自的处理组中。处理按照3×3析因设计完全随机排列。第一个因素是不同水平的BAFLOP颗粒补充量（0、30和60克/千克日粮底物），第二个因素是植物油源补充量[分别为不补充、20克/千克克拉博克籽油（KSO）和20克/千克椰子油（CO）的日粮底物]。在本研究中，补充BAFLOP颗粒提高了产气动力学和体外消化率（P<0.05）。未补充组在孵育后瘤胃pH值下降，但在补充BAFLOP颗粒的处理组中pH值升高。另一方面，补充KSO和CO降低了产气和消化率，但不影响瘤胃pH值。此外，添加BAFLOP颗粒和植物油降低了原虫数量和CH产生量（P<0.05）。基于本研究，可以得出结论，补充BAFLOP颗粒和植物油源可以提高体外发酵效率，同时减少原虫数量和CH产生量。建议使用BAFLOP颗粒（60克/千克日粮底物）和KSO/CO（20克/千克日粮底物）来调控以高浓缩日粮为食的瘤胃发酵特性。
