List of Articles rumen fermentation

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  1 - The Effects of Diet Concentrate and Mineral Buffer Types on Fattening Lambs Performance, Nutrient Digestibility, Blood Metabolites, Rumen Fermentation and Carcass Traits
  M.  Asadi A.  Toghdory T.  Ghoorchi S.  Kargar
  This study was conducted to evaluate the effects of the physical form of concentrate and mineral buffer type on lambs performance, nutrient digestibility, rumen fermentation, blood metabolites and in fattening Dalagh lambs. Twenty-eight lambs with an initial live body w More

  This study was conducted to evaluate the effects of the physical form of concentrate and mineral buffer type on lambs performance, nutrient digestibility, rumen fermentation, blood metabolites and in fattening Dalagh lambs. Twenty-eight lambs with an initial live body weight of 33 ± 2.7 kg and 6 ± 1 months of age were assigned through a completely randomized design with 2 × 2 factorial arrangement to 4 treatments and 7 replicates. Treatments contained: pelleted concentrate with sesquisodium carbonate, pelleted concentrate with sodium bicarbonate, mash concentrate with sesquisodium carbonate and mash concentrate with so-dium bicarbonate. The study period was 84 days. Lambs were weighed fortnightly. In last week of the ex-periment, sampling and collection of feces was done to determine digestibility. Sampling from rumen fluid and blood sampling was carried out on day 80 of experiment. The results showed that in lambs fed pellet concentrate live weight, daily live weight gain, feed conversion, whole carcass, hot carcass and cool carcass were higher (P<0.05) in lambs fed pelleted than those fed mash concentrate. Digestibility of dry matter was higher in pellet concentrate than in mash (P<0.05). In blood parameters, glucose concentration in pellet concentrate was more than mash concentrate treatments (P<0.05). Ruminal pH showed a significant in-crease in the concentrations of mash and sodium bicarbonate buffer in three hours after feeding in the morn-ing (P<0.05). Ammonia-N in rumen had no significant difference was observed. Among the fatty acids, concentration of TVFA, acetate and propionate in treatments of mash concentrate was higher than that of pellet (P<0.05). Similarly, feeding mash concentrate instead of pellet increased rumination activity (P<0.05). According to the results, offering pellet concentrate with either of two buffers showed higher weight gain, digestibility compared to mash concentrate. While lambs fed mash concentrate had higher rumen parameters than those fed pelleted concentrate. Manuscript profile
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  2 - The Effect of Grain Particle Size (Barley and Wheat) on Rumen Fermentation Parameters in Fattening Lambs
  S.M.  Hosseini T.  Ghoorchi A.  Toghdory
  This study was conducted to investigate the effects of grain (barley and wheat) size on rumen fermentation characteristics in fattening Dalaq breed lambs of the study was (3×2) completely randomized design with 6 treatments including; milled barley grain with sieve numb More

  This study was conducted to investigate the effects of grain (barley and wheat) size on rumen fermentation characteristics in fattening Dalaq breed lambs of the study was (3×2) completely randomized design with 6 treatments including; milled barley grain with sieve number two, milled barley grain with sieve number eight, unmilled barley grain, milled wheat grain with sieve number two, milled wheat grain with sieve number eight and unmilled wheat grain were plotted with 5 repetitions. Animals were housed in individual pens for 84 days. Rumen pH was not affected by experimental treatments. There was not significant (P>0.05) effect of grain paricle size on NH3-N ammonia nitrogen and microbial count although though, processing type it was affected by the type of processing and in the treatment of barley grain it was more than wheat. Also in the type of processing, sieve No. 2 produced more ammonia nitrogen. Counting of pro-tozoa was significant in treatments containing barley and wheat and in barley treatment it was more than wheat (P0.01). The total concentrations of volatile fatty acids (VFA) was not affected by the type of grain. Mi-crobial nitrogen and microbial protein produced in the rumen were significantly affected by experimental treatments and both of them were more than wheat in the treatment of barley seeds (P<0.01). Allantoin and uric acid were not affected, and absorbed purine and xanthine and hypoxanthine were affected by the grain effect. The activity of carboxy methyl cellulase enzyme was not affected by the treatments although micro-crystals cellulase enzyme in intracellular and total was affected by the treatments and it was more in barley. Manuscript profile