College of Animal Science, Guizhou University, Guiyang 550025, China; Key Laboratory of Animal Genetics, Breeding & Reproduction in the Plateau Mountainous Region, Ministry of Education, Guizhou University, Guiyang 550025, China.
College of Animal Science, Guizhou University, Guiyang 550025, China.
Bioresour Technol. 2022 Jul;355:127243. doi: 10.1016/j.biortech.2022.127243. Epub 2022 Apr 27.
To investigate the effect of ambient ultraviolet (UV) radiation on the Qinghai-Tibetan Plateau on anaerobic fermentation and subsequent methane emissions, oats grown under different ambient UV conditions (UV1, 100% ambient UV radiation; UV2, 50% ambient UV radiation) were fermented with molasses and Lactobacillus plantarum (LP) inoculant treatments. The UV2 treatment increased (P < 0.05) epiphytic bacterial counts and reduced (P < 0.05) the water-soluble carbohydrate contents of oat. Both the UV2 treatment and the LP inoculant substantially increased the abundance of Lactobacillus and inhibited detrimental microorganisms (enterobacteria and yeasts) during anaerobic fermentation, resulting in the absence of butyric acid. The UV2 treatment increased (P < 0.05) the acid detergent fiber contents after anaerobic fermentation and indirectly increased (P < 0.05) methane emissions by 8.52-14.69% during in vitro ruminal digestion. This study demonstrated that low ambient UV radiation during cultivation facilitated anaerobic fermentation and consequently enhanced subsequent methane emissions from the rumen.
为了研究青藏高原环境紫外线（UV）辐射对厌氧发酵和随后甲烷排放的影响，将在不同环境 UV 条件下（UV1，100%环境 UV 辐射；UV2，50%环境 UV 辐射）生长的燕麦与糖蜜和植物乳杆菌（LP）接种剂进行发酵。UV2 处理增加了（P<0.05）附生细菌的数量，降低了（P<0.05）燕麦的水溶性碳水化合物含量。UV2 处理和 LP 接种剂都显著增加了乳酸菌的丰度，并抑制了厌氧发酵过程中的有害微生物（肠杆菌和酵母菌），导致丁酸的缺失。UV2 处理增加了（P<0.05）厌氧发酵后的酸性洗涤剂纤维含量，并通过体外瘤胃消化间接增加了（P<0.05）甲烷排放 8.52%-14.69%。本研究表明，在培养过程中较低的环境 UV 辐射促进了厌氧发酵，从而增强了瘤胃随后的甲烷排放。
