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Lupinus angustifolius seed meal supplemented to dairy cow diet improves fatty acid composition in milk and mitigates methane production
Animal Feed Science and Technology ( IF 3.2 ) Pub Date : 2020-09-01 , DOI: 10.1016/j.anifeedsci.2020.114590
Magdalena Bryszak , Malgorzata Szumacher-Strabel , Haihao Huang , Piotr Pawlak , Dorota Lechniak , Paweł Kołodziejski , Yulianri Rizki Yanza , Amlan Kumar Patra , Zora Váradyová , Adam Cieslak

Abstract Recently, the narrow-leafed, blue lupine (Lupinus angustifolius) seeds, including the Tango variety, have been used as a potential feed of livestock animals. However, there is still a limited knowledge of possible action of the Tango lupine seed meal (LSM) on ruminal fermentation, enteric methane production, milk yield and composition in dairy cattle. Thus, the present study aimed to investigate the effect of LSM supplementation to dairy cows on ruminal enteric methane production, microbial population, ruminal biohydrogenation and fatty acid (FA) proportion in the ruminal fluid and milk. An in vitro trial comprising of control and five experimental groups (supplementation of LSM at 20, 40, 60, 80, and 100 g/kg diet) was conducted to determine an effective dose level for an in vivo experiment. The in vitro trial was followed by an in vivo experiment conducted on 60 high-yielding Polish Holstein Friesian dairy cows assigned into two groups: the control (n = 30) and the experimental LSM group (n = 30; 2 kg LSM/day/cow). Supplementation of LSM decreased methane emission and archaeal abundances in vitro and in vivo and increased ammonia level in vivo. Ruminal total volatile fatty acid concentration and acetate proportion were reduced by LSM supplementation both in vitro and in vivo. Milk yield and its basic composition were not influenced by the LSM. However, the LSM increased the unsaturated FA content and decreased n6 to n3 FA ratio in milk. Supplementation of LSM upregulated the mRNA expressions of FASN and ELOVL5 genes and downregulated the LPL gene expression in milk somatic cells. The daily cost of LSM diet and the cost of 1 kg of milk production were lower compared with the control. It is concluded that LSM supplementation may improve milk quality without affecting milk yield and has the potential to decrease methane production in dairy cows.

中文翻译:

将羽扇豆籽粉添加到奶牛日粮中可改善牛奶中的脂肪酸组成并减少甲烷产生

摘要 最近,窄叶蓝羽扇豆 (Lupinus angustifolius) 种子,包括 Tango 品种,已被用作家畜的潜在饲料。然而,关于探戈羽扇豆籽粕 (LSM) 对奶牛瘤胃发酵、肠道甲烷产生、产奶量和成分的可能作用的了解仍然有限。因此,本研究旨在研究向奶牛添加 LSM 对瘤胃肠道甲烷产量、微生物种群、瘤胃生物氢化和瘤胃液和牛奶中脂肪酸 (FA) 比例的影响。进行了由对照组和五个实验组(以 20、40、60、80 和 100 g/kg 饮食补充 LSM)组成的体外试验,以确定体内实验的有效剂量水平。体外试验之后是对 60 头高产波兰荷斯坦弗里斯兰奶牛进行的体内试验,分为两组:对照组(n = 30)和实验 LSM 组(n = 30;2 kg LSM/天/牛)。补充 LSM 降低了体外和体内的甲烷排放和古菌丰度,并增加了体内氨水平。在体外和体内添加 LSM 都降低了瘤胃总挥发性脂肪酸浓度和醋酸盐比例。牛奶产量及其基本组成不受 LSM 的影响。然而,LSM 增加了牛奶中不饱和脂肪酸的含量并降低了 n6 与 n3 FA 的比例。补充 LSM 上调 FASN 和 ELOVL5 基因的 mRNA 表达并下调乳体细胞中 LPL 基因的表达。与对照组相比,LSM 日粮的日成本和产奶 1 公斤的成本较低。结论是,添加 LSM 可以提高牛奶质量而不影响产奶量,并有可能降低奶牛的甲烷产量。
更新日期:2020-09-01
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