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Articles by A.A. Naserian
Total Records ( 3 ) for A.A. Naserian
  M.A. Norouzian , R. Valizadeh , F. Azizi , M. Hedayati , A.A. Naserian and F. Eftekhari Shahroodi
  Sixteen Holstein dairy cows with the average live body weight of 652±43 and daily milk yield of 32.9±2.4 kg allocated to 4 treatments in a complete randomized design with 4 replications to evaluate the effect of iodine supplementation on performance of dairy cow and iodine excretions especially in milk. The treatments were: basal diet (without Potassium Iodide) as the control diet, 2, 3 and 4, the basal diet plus 2.5, 5 and 7.5 mg kg-1 diet DM Potassium Iodide, respectively. There were no significant difference between treatments for dry matter intake, milk yield and compositions and the milk production efficiency. Iodine contents in blood, urine, raw and pasteurized milk were significantly (p<0.01) affected by the iodine supplementation. Blood T3 and T4 concentrations were not significantly affected by the treatments. No adverse effect of iodine supplementation on performance and health of dairy cow were detected in this study. It was concluded that iodine supplementation above of NRC recommendation (0.5 mg kg-1 diet DM) led to a desirable level of iodine in the milk ready for human consumption without adverse effects on dairy cows performance and health. This finding could be an excellent recommendation for the area with iodine deficiency mainly for children's.
  M. Kazemi , A.M. Tahmasbi , R. Valizadeh , M. Danesh Mesgaran and A.A. Naserian
  An experiment was carried out to evaluate the substitution of Barley distillers' Grains (BG) ensiled by different level molassed sugar Beet Pulp (BP) with of corn silage on milk production and health of dairy cows. A total 18 Holstein dairy cows (86±10 days postpartum 600±20 kg BW), were randomly assigned to 3 treatments in a balanced completely randomized design (repeated measures). Three diets were formulated to evaluate the replacement of 30% corn silage by an ensiled mixture of BG with and without BP. Treatments were an ensiled mixture of 60% BG with 40% BP (BGBP40%), an ensiled mixture of 80% BG with 20% BP (BGBP20%) and BG ensiled without BP (BGBP0%). Experimental diets contained, 40% forage (60:40, corn silage: Alfalfa hay) and 60% concentrate. Cows were fed a total mixed ration and milked 3 times daily. Diet concentrations of NDF, ADF and CP were 33.2, 19.6 and 16.4% DM (for BGBP40%), 33.7, 20 and 16.8% DM (for BGBP 20%) and 33.8, 20.5 and 16.8% DM (BGBP 0%), respectively. The feed intakes, daily milk yield and milk composition were not significantly different between treatments. There was no significant effect of treatments on rumen pH and NH3-N. Also, there was no significant effect on blood plasma metabolites. Partial substitution BG ensiled with or without BP for corn silage did not have any negative effect on the performance of Holstein dairy cows.
  A. Balakhial , A.A. Naserian , A. Heravi Moussavi , F. Eftekhar Shahrodi and R. Vali Zadeh
  In order to determine the effects of different levels of urea and molasses on chemical composition and in vitro Dry Matter Digestibility (IVDMD) of canola silage one experiment in a 33 factorial arrangement in a complete-randomized design with three replications was conducted. Experimental treatments of this study were 0, 0.5 and 1% of Urea and 0, 4 and 8% of Molasses (On DM basis of canola forage). In vitro Dry-Matter Digestibility (IVDMD) of canola silages determined by 2 stages tilly and terry method. In this part of study rumen fluid was provided from 2 growing Holstein steers with average 2803 kg BW. The results of chemical analyses of silages showed that urea significantly increased DM, CP, pH and ammonia nitrogen concentration of canola silage (p<0.05). Increasing of molasses additive levels caused to enhance silage DM content. But ADF and NDF content of canola silage decreased by it. Results of this study indicated that DM digestibility of canola silages was not affected by urea. But molasses decreased DM digestibility of canola silages. In conclusion, the addition of 0.5% urea plus 8% molasses improved DM, CP, NDF and ADF content of canola silages better than other additive levels of urea and molasses. Addition of urea higher than 0.5% decreased canola quality by increasing silage pH and NH3-N concentration.
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