Wanapat Metha, Huang Bizhi, Viennasay Bounnaxay, Totakul Pajaree, Matra Maharach, Phesatcha Burarat, Ampapon Thiwakorn
Tropical Feed Resources Research and Development Center (TROFREC) Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen, 40002, Thailand.
Yunnan Academy of Grassland and Animal Science, Kunming, 650212, Yunnan, People's Republic of China.
Trop Anim Health Prod. 2020 Sep;52(5):2593-2598. doi: 10.1007/s11250-020-02296-5. Epub 2020 May 23.
Rapeseed provides multi-products as human food and animal feed especially the oil and meal. Rapeseed oil and meal after extraction are nutritious and have been used in animal feeding. This study aimed at studying the effect of rapeseed pod meal as the replacement of concentrate (RPM) on in vitro gas and fermentation characteristics. Dietary treatments were imposed in a 2 × 6 factorial arrangement according to a completely randomized design (CRD). The first factor was two ratios of roughage to concentrate (R:C at 60:40, and 40:60) and the second factor was six levels of RPM at 0, 20, 40, 60, 80, and 100% of dietary substrate. The results revealed that the R:C ratio and RPM increased kinetics of gas production, in vitro degradability and improved rumen fermentation (P < 0.001). Ratio of R:C influenced (P < 0.05) on both protozoal population and methane production, while level of RPR did not. Both factors had influenced (P < 0.01) a, a + b, and c, as well as total gas production; nevertheless, there were no interactions (P > 0.05). Interestingly, both factors have greatly impacted on TVFA, C (P < 0.01) and tended to reduce methane production as level of RPM replacement increased. In conclusion, RPM improved rumen fermentation and increased in vitro DM degradability, hence is potential for replacement of concentrate and effectively used for ruminant feeding.
油菜籽可提供多种产品，如人类食品和动物饲料，尤其是油和粕。提取后的菜籽油和粕营养丰富，已用于动物饲养。本研究旨在探讨用油菜籽荚粕替代精料（RPM）对体外产气和发酵特性的影响。根据完全随机设计（CRD），采用2×6析因设计进行日粮处理。第一个因素是两个粗饲料与精料比例（R:C分别为60:40和40:60），第二个因素是六个RPM水平，分别为日粮底物的0%、20%、40%、60%、80%和100%。结果表明，R:C比例和RPM提高了产气动力学、体外降解率，并改善了瘤胃发酵（P<0.001）。R:C比例对原生动物数量和甲烷产量均有影响（P<0.05），而RPR水平则无影响。两个因素均对a、a+b和c以及总产气量有影响（P<0.01）；然而，不存在交互作用（P>0.05）。有趣的是，两个因素对挥发性脂肪酸、C均有显著影响（P<0.01），且随着RPM替代水平的增加，甲烷产量有降低趋势。总之，RPM改善了瘤胃发酵，提高了体外干物质降解率，因此有潜力替代精料并有效用于反刍动物饲养。
