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Articles by M. Danesh Mesgaran
Total Records ( 3 ) for M. Danesh Mesgaran
  M. Vatandoost , M. Danesh Mesgaran , A. Heravi Mousavi and A.R. Vakili
  Whole crop barley was harvested (about 35% DM), chopped and then ensiled used laboratory scale silos (3.25±0.25 kg). The forage was ensiled as Untreated (UT) or treated using the following additives; formic acid (3.4 or 6.8 mL kg-1 DM; F3 or F6, respectively) acetic acid (3 or 4 mL kg-1 DM; A3 or A4, respectively) propionic acid (3 or 6 g kg-1 of DM; P3 or P6, respectively) ammonium propionate (0.75, 1 or 1.5 g kg-1 of DM; API 0.75 or AP1.5, respectively) Lactobacillus plantarum (8x1010 CFU (LP8) or 16x1010 CFU (LP16) per g of DM) or mixed with Pediococcus pentosaceus plus Propionbacter freudenreichii (5.5x1010 CFU (PP5.5) or 11x1010 CFU (PP11) per g of DM). Four replicates were performed for each treatment. Chemical composition, silage extracts pH and NH3-N and in situ ruminal degradation parameters of DM, CP and NDF were determined. The additives caused a significant difference in the silage regarding chemical composition. Short chain organic acids did not have a significant effect on NH3-N and CP but acetic acid decreased pH of the silages (p<0.05). Biological inoculants resulted to decrease pH and LP8 decreased significantly NH3-N (LP8:7.77 vs. untreated: 9.10 mg dL-1). Adding the buffered propionic acid based additives decrease pH and increase concentration of ammonia-N in the silage. Data of dry matter degradable coefficients showed that the slowly degradable fraction of the silage was affected by the treatments. Degradable coefficients of NDF of the silages were affected by the additives used (p<0.05). The addition both quickly and slowly degradable coefficient of CP were influenced by the treatments used (p<0.05).
  T.S. Vafa , A.A. Naserian , A.R. Heravi Moussavi , R. Valizadeh and M. Danesh Mesgaran
  Two experiments were designated to examine the effects of different levels of fish oil and canola oil on in vitro and in vivo nutrient digestibility. Experiment 1 was performed to assess the effects of unsaturated oils (fish oil, canola oil, their combination) in three levels (2, 4 and 6% on DM basis) on In vitro Dry Matter (IVDMD) and Organic Matter (IVOMD) digestibility of alfalfa hay and corn silage. For both forages, oil supplementation decreased IVDMD and IVOMD significantly (p<0.01) and increasing oil levels significantly (p<0.05) decreased IVDMD and IVOMD of both forages but alfalfa hay was more susceptible to increasing oil levels than corn silage. In experiment 2, eight multiparous early lactation Holstein cows (42±12 DIM, 40±6 kg daily milk yield) were fed a total mixed ration supplemented with either 0% oil (Control), 2% Fish Oil (FO), 1% Canola Oil + 1% Fish Oil (COFO) or 2% canola oil according to a double 4x4 Latin square design to examine the effects of unsaturated oil on milk yield, DMI and nutrient digestibility. Each period lasted 3 weeks experimental analyses were restricted to the last week of each period. Diets consist of 20% alfalfa, 20% corn silage and 60% concentrate. Cows were housed in tie stalls and fed the TMR two times a day to allow 5-10% orts (as-fed basis). Experimental diets had no significant (p>0.05) effect on milk production but DMI decreased significantly (p<0.05) in FO diet. Digestibility of OM and NDF were significantly (p<0.05) decreased in FO diet in comparison with three other diets, ADF digestibility was decreased significantly (p<0.05) in all oil containing diet in comparison with control but fat digestibility was not affected by treatments (p>0.05). Results of the current experiments shows that combination of fish oil and canola oil in 2% of dry matter had less negative effects on nutrient digestibility of forages and total mixture rations.
  M. Mojtahedi and M. Danesh Mesgaran
  The aim of the present study was to evaluate the chemical composition and in situ ruminal degradability of different Sugar Beet Pulp (SBP) sources produced in North-East Iran. Chemical composition of the samples including Crude Protein (CP), Neutral Detergent Fiber (NDF), Acid Detergent Fiber (ADF), Ether Extract (EE) and total ash were determined. In situ ruminal degradability parameters of DM and NDF were determined using four ruminally fistulated Holstein steers. Significant differences were found among various SBP samples for DM, CP, NDF, ADF and ash contents and fiber compounds (NDF and ADF) were the most variable components. Content of NDF varied from 23.03-48.73% with a mean of 34.5% and Standard Deviation (SD) of 7.1%. ADF content ranged from 11.43-24.26% with an average of 17.3%. In addition, considerable variation was observed in degradation parameters including rapidly degradable fraction (a), slowly degradable fraction (b), fractional degradation rate (c), Potential Degradability (PD) and the Effective Degradability (ED) of DM and NDF. The a-fraction of DM varied markedly from 0.012-0.584 with a mean of 0.401 (±0.158). Moreover, c-value of NDF ranged from 0.042-0.074 h-1 with average of 0.054. It was concluded that the chemical composition and ruminal degradation parameters of SBP differs considerably among various SBP sources.
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