It is suggested that the anti-nutritive factor in potatoes should be denatured by appropriate treatment to improve the digestibility of dietary protein. Over the whole gut, coefficients for N changed by −19.8% ( P<0.001), −4.7% (NS) and +9.0% ( P<0.05) when RP, LE or BE, respectively were included in the basal diet. The digestibility of OM was significantly ( P<0.001) reduced by 9.5% with RP but with LE and BE it was similar to the control value. The digestibility of N determined at the terminal ileum was reduced with RP by 9.5% (NS) and with LE by 23% ( P<0.01) while BE increased it by 24.7% ( P<0.01) compared with the coefficient of digestibility for the N of the barley diet. In diet RP 25.5% of this was from potato compared with 7.2 and 7.8% in diets LE and BE, respectively. Each pig was given 2.1 kg organic matter (OM) day −1. These materials each contributed 12 g N day −1 for each pig.
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Four growing pigs, each fitted with an ileal cannula were fed on a basal diet of barley plus minerals and vitamins to which was added minced raw potato (RP) or a liquid extract of potatoes which was either freeze-dried (LE) or boiled and concentrated (BE). The quantity of methanogens was higher with 1.2 and 1.8 % coinciding with the highest methane productionįibrobacter succinogenes Ruminococcus albus star grass methanogens.The nitrogen (N) of raw potato is poorly digested by the pig and the hypothesis tested in the experiment was that this is due to an anti-nutritive substance present in the tuber and not simply due to the physical inaccessibility of much of the potato protein to enzyme attack or to the protein of the potato being refractory to gut enzymes. albus, probably due to the fact that both utilize the same resource, space and carbon source in the rumen. It is concluded that the saponin extract modulates the fermentative process on reducing protozoa, does not modify the presence of F. is no longer able to extract the original RAW TIFF from the new DNG. Saponins increased methanogenic representation and methane production. Convert Details: If I convert the RAW TIFF to a DNG file in Lightroom (checking the. The concentration of valeric acid was 0.68 0.62 0.52 and 0.49 mmol.L -1 for 0, 0.6 1.2 and 1.8 % of saponin extract, respectively. The acetic acid concentration was not modified by the saponins the propionic was reduced with 1.2 % inclusion. Its effect on the main cellulolytic bacteria, determined by PCR-RT, showed that the amount of Fibrobacter succinogenes was not modified while the values of Ruminococcus albus were 25.92 26.72 25.2 and 22.35 CT for the levels 0 0.6 1.2 and 1.8 %, respectively. There was a reduction in protozoa population, regardless the saponin level. The saponin extract was obtained from Sapindus saponaria fruit and its saponin content was of 139.5 mg, equivalent of diogenin.mL -1. Treatments were designed according to the quantity of saponin extract: 1) control, without saponins, 2) 0.6 %, 3) 1.2 % and 4) 1.8 % of the DM of raw saponin extract. 2016, vol.50, n.1, pp.77-87.Īn experiment was conducted under in vitro conditions for determining the effect of a raw saponin extract on the ruminal microbial population and in vitro methane production with star grass ( Cynodon nlemfuensis) substrate. Effect of a raw saponin extract on ruminal microbial population and in vitro methane production with star grass ( Cynodon nlemfuensis) substrate.