In Vitro Studies on Rumen Fermentation and Methanogenesis of Different Microalgae and Their Effects on Acidosis in Dairy Cows

Two in vitro studies were carried out on nonlactating dairy cows. Experiment 1 compared the methanogenesis and rumen fermentation parameters of various microalgae (Spirulina platensis, Chlorella vulgaris, Schizochytrium spp.) protein feeds (sunflower meal, soybean alfalfa hay) with monensin (MON). Rumen determined by an gas production system. 2 ability three to prevent acidosis. They tested for 6 h against oat straw (100 mg) MON (12 g/mL) ameliorate ruminal acidosis caused addition glucose (0.1 as a fermentable carbohydrate fluid. In experiment 1, there variations nutrient content sources. The dry matter substrates ranged from 90 94%, organic 82 88%, spp. having highest. Protein algae 18–62% (DM) 16–48% DM, S. platensis C. vulgaris ether extract (45.5% DM) was highest any substrate. revealed that increased cumulative at level while decrease. Ruminal pH found be higher (6.95) (6.77–6.81) than (6.37–6.50). addition, terms metabolizable energy digestible matter, outperformed algae. produced least amount methane (CH4) substrate, but demonstrated potential CH4 reduction. these groups, decrease accompanied total volatile fatty acids, acetate, acetate-to-propionate ratio, increase propionate. most effective cure controlling However, had effect medium culture prevention. This study can influence fermentation, have reduce production, may incidence rates. These assumptions, however, must validated through vivo studies.