The effect of using sugar beet pulp and canola seeds on microbial fermentation, the flow of nutrients and nitrogen metabolism in continuous culture system

Carbohydrates are the main source of energy for rumen microorganisms, and comprise about 60 to 70 percent of ruminant animal feed. Excessive consumption of starchy carbohydrates leads to increased acute and chronic acidosis in animals. Partial replacement starches with neutral detergent soluble fiber or fat In addition to the energy supply of animals have no problems using starch. The study was conducted due to, the impact of microbial fermentation by rumen bacteria on environmental sustainability.
Eight dual-flow continuous culture fermenters (1750 ml) in a factorial design (2×2) based on randomized complete block were used in three replicated periods of 10 d (7 d of adaptation and 3 d for sampling) to study effects of carbohydrate sources (starch form barely grain versus neutral detergent fiber form sugar beet pulp) with and without canola seed on apparent digestibility, volatile fatty acids profile, nitrogen metabolism and microbial fermentation efficiency. Diets had a 10 to 90 forage to concentrate ratio. The treatments were; 1) 64% barley grain 2) 62% barley grain plus 7% canola seed 3) 36% sugar beet pulp 28% barley grain, 4) 36% sugar beet pulp and 26% barley grain plus 7% canola seed.
Partial replacement of barley grain with sugar beet pulp significantly increased NDF and ADF apparent digestibility and crude protein degradation, ammonia and bacterial synthesis. Apparent digestibility of dry matter, organic matter, NDF, ADF and the concentration of ammonia nitrogen, ammonia and bacterial synthesis reduced significantly by adding canola seeds to diets (P Partial replacement of barley grain sugar beet pulp increased acetate, butyrate, propionate concentration and acetate to propionate ratio and reduce isobutyrate concentration. Adding canola seeds carbohydrate sources had not a significant effect on the concentration of total and individual volatile fatty acids. The overall results showed that partial replacement of starch with neutral detergent soluble fibre can improve the digestibility of neutral detergent fiber and the production of acetate and butyrate in the rumen. Addition canola seed to carbohydrate sources decreased significantly, rumen the digestibility of nutrients, the production of acetate, ammonia nitrogen and protein production in continuous culture system.