Antioxidant action in diets with ground soybeans on ruminal microbial production, digestion, and fermentation in buffaloes

Abstract

The objective of this study was to evaluate the effect of adding ground soybeans and antioxidants to diet of buffaloes on intake, ruminal microbial production, total and ruminal digestibility of nutrients, and ruminal fermentation parameters. Four crossbred buffaloes with a mean weight of 506±29 kg were distributed in a 4×4 Latin square. Four diets were tested: control; diet with ground soybeans; diet with ground soybeans and supplementation with yerba mate; and diet with ground soybeans and supplementation with yerba mate and vitamin E. The addition of ground soybeans had negative effects on intake of dry matter, organic matter, crude protein, neutral detergent fiber, and acid detergent fiber, as well as ruminal digestibility of neutral detergent fiber and total carbohydrates but did not influence total digestibility of nutrients. Yet, the ground soybeans diet increased the concentration of butyrate and microbial production in the rumen. The diet with ground soybeans supplemented with yerba mate decreased the concentration of acetate and increased the concentration of propionate and increased the efficiency of synthesis and the production of microbial protein in the rumen. There was a positive additive effect of vitamin E in the presence of yerba mate, enhancing the synthesis and production efficiency of microbial protein. Thus, the addition of ground soybeans and antioxidants to diet of buffaloes improves the efficiency of microbial protein synthesis and increases the production of butyrate, without, in general, altering the total digestibility of nutrients.

Potential Effects of Delphinidin-3-O-Sambubioside and Cyanidin-3-O-Sambubioside of Hibiscus sabdariffa L. on Ruminant Meat and Milk Quality

“…The antioxidant activities of anthocyanin also affect increased desaturase enzymes activity for converting monounsaturated fatty acid (MUFA) to PUFA or inserting additional unsaturated bonds into already existing PUFA [17,27]. Studies have suggested that PUFAs have antimicrobial activities and are toxic to cellulolytic microorganisms by altering the bacterial cell membranes and the various essential processes that occur within and at the membrane; therefore, PUFAs can also reduce the microbial colonization with the fed particles and reduce the rumen digestibility of fiber [80].…”

“…In addition, as with other polyphenols sources, some HS components with high-lignin contents have low DM digestibility, and therefore, depending on the ruminant species and doses, the inclusion of by-products rich in polyphenols should not affect the DM intake or decrease the voluntary feed intake [26]. However, some authors suggest that adding certain antioxidants might not alter digestibility of DM, organic matter (OM), and neutral detergent fiber (NDF) [41], or even can reduce oxidative stress and increase the NDF, acid detergent fiber (ADF), and DM digestibility [40,41,80].…”

Increasing the Sustainability of Maize Grain Production by Using Arbuscular Mycorrhizal Fungi Does Not Affect the Rumen of Dairy Cattle (Bos taurus) and Buffalo (Bubalus bubalis)

“…Branched-chain VFAs such as isobutyrate are required by many rumen bacteria for protein synthesis, particularly cellulolytic bacteria (50). Isobutyrate supplementation of cattle diets has been reported to improve nutrient utilization and ruminal fermentation characteristics (51).…”