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Articles by M. Danesh Mesgaran
Total Records ( 9 ) for M. Danesh Mesgaran
  R. Jafari Jafarpoor , M. Danesh Mesgaran , A.R. Heravi Moussavi , S. Danesh Mesgaran and F. Tabatabai
  The effect of the source of crude protein in isonitrogenuse diets on early lactating cow responses was investigated. Three isonitrogenuse diets (crude protein: 16.7%) with similar rumen degradable protein, but with different source of protein (Fish Meal (FM) + Canola Meal (CM) as 42.8 + 82.4 g kg-1 DM (FM/CM) or Soybean Meal (SM) + Cotton Seed Meal (CSM) as 48.8 + 91 g kg-1 DM (SM/CSM1) or 84 + 42.8 g kg-1 DM (SM/CSM2)) were provided. The diets were fed to 24 early lactating Holstein cows (8 animals per each treatment), 10±3 days in milk and 37.34 kg day-1 milk yield, for 7 weeks, using a completely randomized design with repeat measures of data in time. Daily Dry Matter Intake (DMI), milk yield and milk composition were recorded. Blood glucose and Blood Urea Nitrogen (BUN) were measured in weeks 3 and 6 of the experiment and some blood metabolites and enzymes including insulin, Serum Glutamic Oxaloacetic Transaminase (SGOT) and Serum Glutamic Pyrovic Transeaminase (SGPT) were measured at the last week of the experiment. There was no significant effect on DMI (FM/CM = 20.32, SM/CSM1 = 21.04 and SM/CSM2 = 20.82, SEM = 0.59 kg day-1) (p>0.05). However, the effect of time was significant (linear and quadratic) (p<0.0001). Milk yield was similar among treatments. Milk composition (percentage and yield) was similar for all treatments, although time effect on milk protein and fat percentage was significant (linear and quadratic) (p<0.05). Plasma concentration of insulin was similar in cows fed the experimental diets (FM/CM = 9.16, SM/CSM1 = 7.90 and SM/CSM2 = 12.41, SEM = 1.34 micro U mL-1). Blood urea nitrogen concentration was not differed among treatments (p>0.05). Serum glutamic oxaloacetic transaminase was significantly affected by the dietary protein sources (FM/CM = 74.62, SM/CSM1 = 91.12 and SM/CSM2 = 83.50 mg dL-1, SEM = 6.36) (p<0.05), in 4 h after the morning feeding. It was concluded that protein sources with similar rumen degradability might not causing significant impact on performance and some blood metabolites in early lactating Holstein cows.
  M. Danesh Mesgaran , M. Malakkhahi , A.R. Heravi Moussavi , A. Vakili and A. Tahmasbi
  This study was conducted to determine the effect of chemical treatment on fermentative activity and nutritive value of Sesame stover by in situ and in vitro gas production techniques. Treatments were untreated Sesame Stover (SS), SS+Sulphuric Acid (SSA), SS+Urea (SSU), SS+NaOH (SSN) and SS+Urea+NaOH (SSUN). Nylon bags (9x17 cm) each containing 5 g sample (2 mm screen) were incubated in the rumen of fistulated sheep for 0.0, 4, 8, 16, 24, 36, 48, 72 and 96 h to determine the ruminal disappearance. Cumulatve gas production was recorded at 2, 4, 6, 8, 12, 24, 36, 48, 72 and 96 h of incubation and the equation of P = A (1-e-ct) was used to describe the kinetics of gas production. Results showed that NDF concentration of the samples was significantly (p<0.05) decreased by sulphuric acid treatment also the urea caused a significant (p<0.05) increase in CP content of sesame stover. Dry matter ruminal disappearance was significantly (p<0.05) increased by NaOH treatment. Moreover, the in situ quickly degradable fraction of CP was increased (0.625±024) when urea applied. The b fraction and rate of gas production were significantly (p<0.05) increased (72.32±2.88) and decreased (0.029±0.002), respectively by adding the NaOH to SS.
  M. Danesh Mesgaran and T. Mohammadabadi
  This experiment was conducted to investigate the effect of fat content (high: 165 g fat kg-1 DM and low: 25 g fat kg-1 DM) of sodium hydroxide (40 g kg-1 DM) or formaldehyde (3 and 6 g kg-1 DM) treated sunflower meal on in vitro gas production parameters used mediums containing isolated rumen microorganisms including total rumen microbiota (TM), bacteria (B), protozoa (P) or fungi (F). Results showed formaldehyde (both applied concentrations) caused a significant reduction in the rate and gas production from fermentable fraction of sunflower meal samples by the isolated microbial groups. Sunflower meal with high fat concentration treated with NaOH had the highest gas production (p<0.05) when fermented by the rumen isolated micro-biota (193, 33, 89 and 175 mL 500 mg DM sample for TM, B, P and F, respectively). Gas produced from the chemically treated or untreated high fat containing sunflower meal was more than the low fat content samples. Therefore, it was concluded both fat concentration and chemical treatments used in the present study may affect the fermentation potential of sunflower meal as evaluated by the applied in vitro procedure. In addition, in vitro gas production of high and low fat content sunflower meal by isolated rumen microbiota fractions are influenced by formaldehyde and NaOH treatments.
  M. Danesh Mesgaran , A. Vakili and J. Tavallaei
  Alfalfa hay (30% dry matter) was ensiled as untreated (AS) or treated with formic acid (ASF, 24 mL kg-1 DM) or formic acid+urea (ASFU, 24 mL and 4 g kg-1 DM, respectively). Disappearance of protein and dry matter from the samples was determined using the in situ mobile bag procedure. In lactation trail, 12 Holstein cows received diets containing 28.5% AS or ASF or ASFU, 30% corn silage, 7% alfalfa hay and 34.5% concentrate for 8 weeks. The chemically processed applied caused a significant decrease in ruminal and an increase in post-ruminal dry matter disappearances of the silages evaluated (p<0.05). Dry matter intake and yields of milk did not influenced by the experimental diets. Milk urea nitrogen concentration of the cows received the diet containing ASFU were significantly lower than the others (p<0.05). Blood plasma concentration of glucose was increased when the diet containing of ASF was fed to the animals (p<0.05) compared with the others.
  E. Ibrahimi Khorram Abadi , A.M. Tahmasbi , M. Danesh Mesgaran and R. Valizadeh
  An experiment was carried out to evaluate protein degradability on animal performance, ruminal and blood metabolites and ruminal ecosystem. Eight multiparous Holstein cows were used in a change over design in four period. Supplemental protein which provided via Soybean Mal (SBM), Meat Meal (MM), urea were added to basal diet based on the providing same CP protein. Treatments were provided via Soybean Mal (SBM), Meat Meal (MM), urea and with flowing rumen degradability (T1: 74.5, T2: 70.4, T3: 68.7 and T4: 63.7%). Each experimental period was conducted for 21 days (14 days for adaptation and 7 days for sampling). There were no significant difference between treatments for DMI. However, trend indicates that by reduction of RDP in diet milk production decreases. No difference were observed for milk composition, body weight, pH and blood metabolites. Ruminal ammonia nitrogen was numerically higher for does fed T1 (9.25 vs 7.81, 6.94 and 7.98) and this trend was observed for blood urea nitrogen as well. Protozoa number was higher in does fed SBM with Urea.
  A.R. Heravi Moussavi and M. Danesh Mesgaran
  The aim of this study was to compare, the effect of diverse sire origins on first lactation performance, Age at First Calving (AFC), first-parity calving class and days open and also Length of Productive Life (LPL) in Iranian Holstein cows. Data regarding to the all first-calving cows were collected during 1996, until 2007 in five large commercial Holstein farms. Farms were located in Northeastern of Iran. Each cow has been characterized by demographic data, production and reproduction data. The dependent variables analyzed were the cumulative first 60, 100 and 200 days as well as 305 days adjusted milk productions, AFC, calving class (including eutocia, dystocia, stillbirth and abortion), days open and LPL. Data were analyzed using mixed models. The effect of the sire origins on calving class was evaluated by nominal logistic analysis. The result showed that first-parity milk performance was similar among the daughters of sire groups (p>0.05). Milk production was numerically higher for the imported sire groups. Milk persistency was better for the imported sires compare with the domestic sourced sires (p<0.05). Sire origin had no apparent effect on AFC, first-parity calving class and interval from first calving to conception (p>0.05). AFC was decreased and days open was increased over the years (p<0.05). The cumulative 60 days milk production had no apparent effect on first-parity days open but days open tended to increase in the high producer cows (p = 0.14). Length of productive life was higher among the daughters of Iranian sires compare with the Canadian sires (p = 0.02). The similar production performance among the daughters of sire origin in this study could be a help in reducing on-farm expenses in Iranian dairy industry. More studies needed to evaluate the results of this study in different climates of Iran along with a larger data set.
  M. Danesh Mesgaran , T. Mohammadabadi , M. Chaji and M.R. Ghorbani
  This experiment was conducted to evaluate the effect of exogenous enzyme (3 g kg-1 DM), formaldehyde (30 and 60 g kg-1 DM) and or sodium hydroxide (40 g kg-1 DM) on in vitro gas production parameters of sunflower meals (25 and 165 g fat kg-1 DM) were with gas production technique and using fistulated sheep rumen fluid. Kinetics of gas production was fitted to an exponential model. Sodium hydroxide and enzyme treatments significantly increased gas production (B), Metabolizable Energy (ME), Organic Matter Digestibility (OMD), Net Energy Lactation (NEL), ammonia-N (NH3-N) and Short Chain Fatty Acid (SCFA) but formaldehyde decreased them. The lowest of gas production was estimated for low fat sunflower meal treated with 60 g formaldehyde/kg DM (75.9 mL/500 mg DM). There was significant difference among samples for gas production rate Constant (C). Sodium hydroxide treated high fat sunflower meal had the highest of ME, OMD, NEL and SCFA (35.8 MJ kg-1 DM, 207.5 g kg-1 OM, 2.42 Mcal kg-1 DM and 1.53 μmol L-1, respectively). Ammonia-N concentration of high fat sunflower meal were the highest (40.9 mg/100 mL). The values of B, ME, OMD, NEL, NH3-N and SCFA for low fat sunflower meal was less than high fat sunflower meal. The results showed, it may be that gas production parameters of low fat and high fat sunflower meal are influenced by exogenous enzyme, formaldehyde and NaOH.
  T.S. Vafa , A.A. Naserian , A.R. Heravi Moussavi , R. Valizadeh and M. Danesh Mesgaran
  This experiment was designated to examine the effects of different levels of fish oil and canola oil on in vitro dry matter and organic matter digestibility of two forages including alfalfa hay and corn silage. Using a completely randomized design with 3x3 factorial arrangement of treatments, the effects of three levels (2, 4 and 6% of DM) of three oil sources (Fish Oil (FO), Canola Oil (CO) and combination of Fish Oil and Canola Oil (FOCO) in 50:50 ratios) in an in vitro batch fermentation on Dry Matter (IVDMD) and Organic Matter (IVOMD) digestibility of alfalfa hay and corn silage were studied. In this experiment, in contrast with control, all oil sources decreased IVDMD (71.4, 69.1, 66.2 and 70 for control, FO, CO and FOCO, respectively) and IVOMD (69.98, 66.4, 63.2 and 68.4 for control, FO, CO and FOCO, respectively) of alfalfa hay significantly (p<0.01). For corn silage, IVDMD (64.3, 63.5, 59.1 and 63% for control, FO, CO and FOCO, respectively) and IVOMD (65.4, 61.9, 58.4 and 62.5% for control, FO, CO and FOCO, respectively) decreased significantly, when oil was added. Among oil sources, canola oil significantly (p<0.05) decreases IVDMD and IVOMD of both forages in comparison with two other oil sources. 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.
  A. Faramarzi Garmroodi , M. Danesh Mesgaran , A.R. Vakili , A.R. Heravi Moussavi , A. Tahmasbi and H. Jahani-Azizabadi
  An in vitro experiment was conducted to determine the effect of chemical or physical treatments on disappearance kinetics of dry matter, Neutral Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) of Cottonseed Hulls (CH). For chemical treatment, CH were treated with NaOH as 20 g kg-1 DM (a 20% solution of NaOH was sprayed on CH and kept for 0.5 h (CH2S0.5) or 48 h (CH2S48)) or 40 g kg-1 DM (a 40% solution of NaOH was sprayed on CH and kept for 0.5 h (CH4S0.5) or 48 h (CH4S48) at room temperature). Physical processing was done using microwave irradiation (900 W) for 4, 6 and 8 min (CHm4, CHm6, CHm8, respectively). Fifty-five mL of medium was supplied into 100 mL bottle containing 0.45 g of each sample DM (4 replicates). Then, each bottle was inoculated under carbon dioxide with 5 mL of mixed rumen microbes 24, 48, 72 and 96 h. Then, contents of each bottle were filtered through a 22 μm filter, DM and Neutral Detergent Fiber (NDF) of the unfiltered medium was determined. Kinetic disappearance parameters were determined using first order exponential model of D(t)= D(i).e(-k. time) + I; D(t) is potentially digestible residues, D(i) is potentially digestible fraction, k is fractional rate constant of digestion (h-1) and I is indigestible fraction. Chemical or physical treatment improved DM disappearance significantly (p<0.05). There was no significant difference in disappearance of NDF between microwave irradiated CH for 4, 6 and 8 min. Microwave irradiation for 8 min at 48 and 72 h incubation showed the highest ADF disappearance among the treatments. Physical or chemical treatment had no significant effect on first order DM disappearance of CH.
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