Effect of soybean oil availabilities on rumen biohydrogenation and duodenal flow of fatty acids in beef cattle fed a diet with crude glycerine

Abstract

Soybean oil with different ruminal availability (whole soybeans (WS), soybean oil (SO) and calcium salts (CS)) was used to evaluate the fatty acid (FA) intake, rumen biohydrogenation (BH) and duodenal flow of FA in Nellore steers fed diets with crude glycerine (CG). Eight castrated Nellore steers were fitted with a ruminal and duodenal silicone cannula, and distributed in a double, simultaneous, Latin square 4 × 4 design with four diets and four experimental periods. Concentrates contained ground maize, urea, mineral salts, CG (100 g/kg DM) and soybean products with different availability of soybean oil: (1) no additional fat (CO), (2) WS, (3) SO or (4) CS. Fat supplementation was fixed to obtain 50 g ether extract/kg DM. Experimental treatments had no effect on DM intake, DM duodenal flow or ruminal turnover rate of C:16 FA. However, fat addition increased C:18 and turnover rates of total FA rumen (p < 0.05). CS resulted in lower C:18 turnover rates and lower ruminal BH of monounsaturated and unsaturated FA (UFA) than WS (p < 0.05). SO resulted in a greater duodenal flow of C18:0 (stearic acid), C18:1t-11 (vaccenic acid) and saturated FA than the WS and CS diets (p < 0.05). CS resulted in a higher duodenal flow of C18:3n-3 (linolenic acid) than WS (p < 0.05). The association of CG and calcium salts in Nellore steers was the best nutritional strategy to increase duodenal flow of healthier UFA, which may increase the deposition of these FA in meat. However, SO associated with CG association increased the duodenal flow of vaccenic acid, which is main precursor of endogenous synthesis of conjugated linoleic acids in tissues.

Dietary spirulina supplementation modifies rumen development, fermentation and bacteria composition in Hu sheep when consuming high-fat dietary

“…This change may be caused by a decrease in total VFA, leading to changes in the ruminal digesta bacterial community. Lipid supplementation altered the concentration of all quantified VFA in the rumen, which was triggered by a larger intake of total fatty acid ( 44 ).…”

Soybean hulls as feed substitute of ground corn can increase the fiber digestibility and bacterial fibrolytic profile of grazing Nellore steers during the rainy season

“…However, when beef cattle are supplemented with lipids, ruminal fermentation can be altered due to the toxicity of long-chain fatty acids, especially unsaturated fatty acids (UFA), to ruminal fibrolytic bacteria and methanogenic archaea (HENDERSON, 1973;JENKINS, 1993), resulting in lower fiber digestibility and DM intake, depending on the composition of basal diet. Thus, different nutritional strategies as whole soybean grain have been used to reduce the UFA effects on rumen microbes or ruminal fermentation parameters in beef cattle (GOMEZ-INSUASTI et al, 2014;GOMEZ-INSUASTI et al, 2018).…”

A comparison of the physiochemical features of three tertiary hybrid pigs with and without spent coffee ground supplementation

“…Consuming high quantities of SFA, such as C14:0, C16:0, and C20:0, can increase the risk of developing type 2 diabetes and cardiovascular disease. Therefore, they should be moderately ingested [30][31][32]. We found that C14:0 levels were higher in YB loins, whereas C16:0 and C20:0 levels were higher in YW loins.…”