Matra Maharach, Totakul Pajaree, Viennasay Bounnaxay, Phesatcha Burarat, Wanapat Metha
Tropical Feed Resources Research and Development Center (TROFREC), Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand.
Department of Agricultural Technology and Environment, Faculty of Sciences and Liberal Arts, Rajamangala University of Technology Isan, Nakhon Ratchasima 30000, Thailand.
Anim Biosci. 2021 Apr;34(4):594-602. doi: 10.5713/ajas.20.0151. Epub 2020 Aug 21.
An experiment was conducted to assess the effect of dragon fruit peel pellet (DFPP) as a rumen enhancer of dry matter consumption, nutrient digestibilities, ruminal ecology, microbial protein synthesis and rumimal methane production in Holstein crossbred bulls.
Four animals, with an average live-weight of 200±20 kg were randomly assigned in a 4×4 Latin square design to investigate the influence of DFPP supplementation. There were four different dietary treatments: without DFPP, and with 200, 300, and 400 g/h/d, respectively.
Results revealed that dry matter consumption of total intake, rice straw and concentrate were not significantly different among treatments (p>0.05). It was also found that ruminal pH was not different among treatments (p>0.05), whilst protozoal group was reduced when DFPP increased (p<0.01). Blood urea nitrogen and NH3-N concentrations were increased at 400 g of DFPP supplementation (p<0.01). Additionally, volatile fatty acid production of propionate was significantly enhanced by the DFPP supplementation (p<0.05), while production of methane was consequently decreased (p<0.05). Furthermore, microbial protein synthesis and urinary purine derivatives were remarkably increased especially at 400 g of DFPP supplementation (p<0.05).
Plant secondary compounds or phytonutrients (PTN) containing saponins (SP) and condensed tannins (CT) have been reported to influence rumen fermentation. DFPP contains both CT and SP as a PTN. The addition of 400 g of DFPP resulted in improved rumen fermentation end-products especially propionate (C3) and microbial protein synthesis. Therefore, DFPP is a promising rumen enhancer and indicated a significant potential of DFPP as feedstuff for ruminant feed to mitigate rumen methane production.
进行一项实验，以评估火龙果果皮颗粒（DFPP）作为瘤胃增强剂对荷斯坦杂交公牛干物质采食量、养分消化率、瘤胃生态、微生物蛋白合成和瘤胃甲烷产生的影响。
将四只平均体重为200±20千克的动物，按照4×4拉丁方设计随机分配，以研究补充DFPP的影响。有四种不同的日粮处理：不添加DFPP，以及分别添加200、300和400克/头/天。
结果显示，各处理间总采食量、稻草和精料的干物质采食量无显著差异（p>0.05）。还发现各处理间瘤胃pH无差异（p>0.05），而随着DFPP添加量增加，原生动物数量减少（p<0.01）。补充400克DFPP时，血尿素氮和NH3-N浓度升高（p<0.01）。此外，补充DFPP显著提高了丙酸的挥发性脂肪酸产量（p<0.05），同时甲烷产量相应降低（p<0.05）。此外，微生物蛋白合成和尿嘌呤衍生物显著增加，尤其是在补充400克DFPP时（p<0.05）。
据报道，含有皂苷（SP）和缩合单宁（CT）的植物次生化合物或植物营养素（PTN）会影响瘤胃发酵。DFPP作为一种PTN，同时含有CT和SP。添加400克DFPP可改善瘤胃发酵终产物，尤其是丙酸（C3）和微生物蛋白合成。因此，DFPP是一种有前景的瘤胃增强剂，表明DFPP作为反刍动物饲料以减少瘤胃甲烷产生具有巨大潜力。
