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Articles by Naser Maheri-Sis
Total Records ( 13 ) for Naser Maheri-Sis
  Saeid Chekani-Azar , Habib Aghdam Shahriar , Naser Maheri-Sis , Ali-Reza Ahmadzadeh and Tohid Vahdatpoor
  This experiment was conducted to assess the effect of replacing Poultry Fat (PF) with Fish Oil (FO) in broiler diets on Fatty Acid (FA) composition and sensory quality of broiler meat. Three percents oil in 4 diets were altered with replacing PF by FO in completely randomized design at four treatments with 4 replicates (T1 = 3% PF, T2 = 2% PF+1% FO, T3 = 1% PF+2% FO and T4 =3% FO) and were given ad libitum to the birds fed throughout the growth period. The fatty acids profile and quality of the breast tissue were determined. Removing PF from diet by replacement of FO decreased total saturated (TSAT) (p<0.01) and total monounsaturated FA (TMUFA) (p<0.001). The amounts of total polyunsaturated FA (TPUFA) were significantly increased when FO level was increased (p<0.001). Altering of substituting PF by FO resulted in higher values of Linolenic Acid (LNA) and long-chain n-3 PUFA (C22:6n-3, C22:5n-3, C20:5n-3) in the breast tissue (p<0.001)and therefore decrease in the n-6: n-3 ratio (p<0.001). In the sensory quality evaluations (flavor and normal smell), the meat of T3 was acceptable. Therefore, with replacing PF by FO in diets of broiler chicks, meat of T3 could be enriched without significant sensory losses, which may improve nutritional content and promote of human health.
  Afshar Mirzaei-Aghsaghali , Naser Maheri-sis , Ali Mirza-Aghazadeh , Amir Reza Safaei , Amir-Farhang Houshangi and Abolfazl Aghajanzadeh-Golshani
  The aim of the study was to determine the chemical composition and ruminal degradation characteristics of two alfalfa varieties including Kareyonge (KAR) and Hamedani (HAM) grown in West Azerbaijan in Iran, using in situ technique. The nutritional parameters were Dry Matter (DM), Organic Matter (OM) and Crude Protein (CP). Nylon bags filled with 5 g of each forage were suspended in the rumen of three cannulated Gezel rams immediately before feeding and incubated for 7 different times (0, 4, 8, 16, 24, 48 and 72 h). Parameters for degradation kinetics included readily degraded fraction, slowly degraded fraction, lag time and fractional rate of passage. No significant difference found between DM, CP, Ash and Ether Extract (EE) of two alfalfa varieties although the difference for Crude Fiber (CF), Neutral Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) were significant (p<0.01).The degradability of DM, OM, CP and Effective Rumen Degradable Protein (ERDP) at a rate of 0.05/h for KAR and HAM varieties were 54.2, 52.16, 40.1%, 72.57 g kg-1 DM and 56.97, 54.9, 39.25%, 89.4 g kg-1 DM, respectively. Calculations based on in situ degradability indicate that HAM alfalfa can have a higher inclusion than KAR alfalfa in diets for ruminants because of lower NDF, greater cell contents and ERDP.
  Tohid Vahdatpour , Kambiz Nazer-Adl , Yahya Ebrahim-Nezhad , Naser Maheri-Sis and Sina Vahdatpour
  This experiment was conducted to determine the effects of increasing, energy to protein ratio and partial decreasing of nutrient contents of diet using different levels of fats on broiler chickens performance and serum lipids. With addition of fats (Poultry oil, Soybean oil and Tallow) in two levels (4 or 8%) to basal diet that was already balanced on NRC (1994) recommendations, seven different non-isocaloric and non-isonitrogenic diets were prepared (12 or 24% increasing of energy to protein ratio in 4 or 8% of fat level addition, respectively) and given ad libitum between 22 to 49 day of age. The blood samples were collected at 35 and 49 day and weight of selected visceral organs were recorded at 49 day. The results suggested that high fat intake had no significant effect on Final Body Weight (FBW) and Feed Conversion Ratio (FCR). Numerically the FBW was higher in all groups that received high fat levels than control group. But abdominal fat deposition only in birds that was fed by additional soybean oil and tallow in 4% level was constant. The liver weight significantly decreased (p<0.01) and abdominal fat weight significantly increased (p<0.05) by elevation of fat level. Serum lipids concentrations had no significant difference in dietary treatments. Serum LDL concentration showed significant elevation from 35 to 49 day (p<0.01), whereas serum cholesterol concentration showed decline at the same times (p<0.05). With increasing of dietary fat level from 4 to 8%, serum cholesterol had showed elevation (p<0.05). Therefore, it seems that broilers are more resistant against the high dietary fat intake and they can be effectively used for nutritional and growth requirements promoting, without mortality.
  Naser Maheri-Sis , Afshar Mirzaei-Aghsaghali , Ali Mirza-Aghazadeh and Amir Reza Safaei
  The aim of this experiment was to determine the potential nutritive value of Hamedani (HAM) and Kareyonge (KAR) using the chemical composition, Dry Matter Digestibility (DMD), Organic Matter Digestibility (OMD) and Metabolizable Energy (ME) content. Each of the two alfalfa varieties were offered ad libitum to three Gezel rams. No significant difference found between Dry Matter (DM), Crude Protein (CP), Ash and Ether Extract (EE) contents of two alfalfa varieties, although the difference for Crude Fiber (CF), Neutral Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) were significant (p<0.001). Dry Matter Intake (DMI), Organic Matter Intake (OMI) and Crude Protein Intake (CPI) were similar in HAM and KAR hays (p>0.05). Dry Matter Digestibility (DMD) and organic matter digestibility in HAM hay were significantly (p<0.01) higher than that of KAR hay, whereas Crude Protein Digestibility (CPD) in HAM hay was similar than that KAR hay (p>0.05). Digestible Organic Matter in Dry Matter (DOMD) and ME intake in HAM were significantly (p<0.01) higher than that KAR hay. Calculations based on in vivo digestibility indicate that HAM alfalfa can have a higher inclusion than of KAR alfalfa in diets for ruminants because of lower cell wall (NDF and ADF) contents, greater DOMD and ME intake.
  S.R. Riyazi , Yahya Ebrahim-Nezhad , Kambiz Nazer-Adl , Naser Maheri-Sis , T. Vahdatpour and P. Fouladi
  This study was conducted to determine the effect of replacing different levels of rapeseed meal with soybean meal on the performance of commercial laying hens. Four levels of rapeseed meal; 0, 5, 10 and 15% were used in diets of 144 Hi-Line (W-36, Strain) laying hens from the age of 44 to 56 weeks. Hens were distributed in a randomized complete block design with 4 treatment, 3 replicates and 12 hens in each replicate. The parameters measured were the feed intake, hen-day egg production, egg mass, feed conversion ratio and egg weight. With increasing of rapeseed meal level in diets, feed intake was showed elevation (p<0.05). Egg weight was significantly higher when birds fed 10% rapeseed meal (p<0.05). No specific trend was observed on the effect of rapeseed meal on egg mass and feed conversion ratio, however these parameters were higher in groups that fed 10% rapeseed meal. With increasing rapeseed meal in diets, production ratio was decreased. It was concluded that; the replacement of 10% rapeseed meal with soybean meal in the layer diets might be useful and had economical benefits for producers.
  Afshar Mirzaei-Aghsaghali and Naser Maheri-Sis
  The aim of this study is to review effective factors on decrease methane emission by enteric fermentation, mainly by ruminants. Global surface temperatures are predicted to increase between 1 to 6°C during the twenty-first century; primarily due to increased levels of Greenhouse Gases (GHGs) principally carbon dioxide (CO2), methane (CH4) and Nitrous Oxide (N2O) in the atmosphere. Agricultural emissions of methane have recently been estimated at 10.2 million tonnes per year. Of these, approximately two-thirds come from enteric fermentation and one-third from livestock manure. To discuss factors relation to emissions of GHG’s (specific methane gas) from ruminants, we need to divide them in four groups; nutrition, management, biotechnology and microbiology. In this article, we discussed nutritional factors related to emission of methane gases in ruminants. Other factors (factors related to management, biotechnology and microbiology) will discuss in further articles.
  Yahya Ebrahimnezhad , Naser Maheri-Sis , Abolfazl Aghajanzadeh-Golshani , Jamshid Ghiasi Galekandi , Masoud Sarikhan and Akbar Darvishi
  This experiment was conducted to evaluate the combined effects of Citric Acid (CA) and Microbial Phytase (MP) on the serum concentration and digestibility of some minerals in broiler chicks. This experiment was conducted using 360 Ross-308 male broiler chicks in a completely randomized design with a 3x2 factorial arrangement (0, 2.5 and 5% CA and 0 and 500 FTU MP). Four replicate of 15 chicks per each were fed dietary treatments. The concentration of zinc, copper and manganese of serum and their digestibility and also digestibility of apparent metabolizable energy (AMEn) was evaluated. The results showed that interaction effect of CA and MP on concentration of copper, zinc and manganese in serum of broilers fed with low available phosphorus diets was significant (p<0.05). Adding 2.5% CA into low available phosphorus diets increased digestibility of zinc in comparison to diets without CA and with 5% CA in broiler. Adding CA into low available phosphorus diets increased manganese digestibility on based corn-soybean meal diets (p<0.01).
  Naser Maheri-Sis , Mohammad Chamani , Ali Asghar Sadeghi , Ali Mirzaaghazadeh , Kambiz Nazeradl and Abolfazl Aghajanzadeh-Golshani
  This study was carried out to evaluate effects of drying and ensiling on ruminal cell wall (neutral detergent fibre; NDF) degradation of tomato pomace using in situ technique. Nylon bags filled with 5 g (on dry matter basis) of each wet, dried and ensiled tomato pomace were suspended in the rumen of three fistulated Ghezel rams for 0, 2, 4, 8, 12, 24, 48 and 72 h and obtained data were fitted to a non-linear degradation model to calculate ruminal degradation characteristics. Results showed that drying and ensiling, cause significant decrease in cell wall degradation of tomato pomace at all incubation times. Cell wall water soluble fraction (a) was decreased and potentially degradable fraction (b) was increased, while rate of degradation (c) and potential degradability (a+b) were not significantly affected by drying and ensiling of tomato pomace. Effective rumen degradability of cell wall was significantly reduced by the processing. In an overall conclusion, cell wall degradability of fresh tomato pomace was higher than that of dried and ensiled form. In other word, ensiling and drying can exert negative effects on cell wall degradation of tomato pomace in the rumen.
  Naser Maheri-Sis , Bayaz Abdollahi-Ziveh , Ramin Salamatdoustnobar , Alireza Ahmadzadeh , Abolfazl Aghajanzadeh-Golshani and Mehdi Mohebbizadeh
  This study was carried out to determine the chemical composition and ruminal degradability of Soybean Straw (SBS). Samples were collected from several soybean grain threshing farms in Moghan, Iran. Chemical composition for Dry Matter (DM), Crude Protein (CP), Ether Extract (EE), Organic Matter (OM), Neutral Detergent Fibre (NDF), Acid Detergent Fibre (ADF) and Acid Detergent Lignin (ADL) of pooled samples were 89.18, 5.10, 2.85, 96.90, 80.80, 63.20 and 13.00%, respectively. Degradation procedure was performed using nylon bags filled with 5 g of SBS and suspended in the rumen of three fistulated Gezel rams for 0, 2, 4, 8, 16, 24, 48 and 72 h and obtained data were fitted to a non-linear degradation model to calculate ruminal degradation characteristics. Results showed that soluble fraction (a) of SBS were very low, especially in case of DM and OM. Potential degradability (a + b) of SBS for DM, OM and CP were 36.97, 37.74 and 68.07% and for effective degradability (Out flow rate 0.02 h-1) were 21.40, 22.27 and 48.30%, respectively. It is conclude that, SBS have low DM and OM degradability and higher CP degradability in the rumen. Based on chemical composition and degradation characteristics, untreated SBS can be used in the ration of ruminant in limited levels.
  Kamal Mirzadeh Ahari , Ramin Salamatdoustnobar , Naser Maheri-Sis , Abolfazl Gorbani , Ali Halimi Shabestari , Ali Noshadi , Hossien Samadi and Jafar Salimi Nezhad
  An experiment was conducted to study the effects of Thyme Methanol Extract (TME), on rumen methanogenesis in vitro. Different levels (0, 0.25 and 0.5 mL) of TME were incubated for 2, 4, 12, 16, 24, 48, 72 and 96 h in diluted ruminal fluid with a 100% forage diet (alfalfa) to evaluate their effects on rumen methane production. This experiment was carried out based on Complete Random Design (CRD) with three treatments and three replicates. Treatment A is 0 mL of TME and diet (control), Treatment B is 0.25 mL of TME and diet and Treatment C is 0.5 mL TME and diet. Result indicated that the methanol extract of thyme (0.25 and 0.50 mL) reduced methane production in all of the incubation times without 2 h (p<0.05).
  Ali Halimi Shabestari , Ramin Salamatdoustnobar , Naser Maheri-Sis , Abolfazl Gorbani , Kamal Mirzadeh Ahari , Ali Noshadi , Hossien Samadi and Jafar Salimi Nezhad
  The aim of this study was to investigate effects of different levels of Clove Methanol Extract (CME) on methane production in ruminant with practical diets. Two experimental diets (diet1: 100% forage and diet 2: 100% barley) were used to investigate effects of 3 levels of CME (0, 0.5 and 1 ml) on methane production at 2, 4, 12, 16, 24, 48, 72 and 96 h of incubation. Gas production was continuously measured by EX-TEC HS 680 GC. Cumulative gas production was recorded at 2, 4, 12, 16, 24, 48, 72 and 96 h of incubation periods. Data processed in excel and analyzed using SAS statistical analyze software. Result show that Clove methanol extract in initial time of incubation (2 and 4 h) not affects on the decreased of methane production, but increase incubation time CME significantly decreased methane gas volume in two diets and all of CME levels and could significantly decrease methane volume in the treatment. According to result we could suggest CME for improve methane production in the in vitro condition and need further research for application CME in field of ruminant nutrition.
  Naser Maheri-Sis , Abolfazl Aghajanzadeh-Golshani , Hosein Cheraghi , Yahya Ebrahimnezhad , Jamshid Ghiasi Ghalehkandi and Abolfazl Asaadi-Dizaji
  Chickpea straw is the main by-product which is produced in large amounts after chickpea grain threshing. There is a little information about its nutritive value. This experiment was carried out to determine the fiber and non-fibre component, ruminal dry matter degradability and Metabolizable Energy (ME) of chickpea straws using nylon bags (in situ) technique. Replicated samples were incubated at 0, 2, 4, 8, 12, 24, 48 and 72 h in 3 rumen canulated male Ghezel rams with 50±3 kg body weight. Dry Matter (DM), Neutral Detergent Fibre (NDF), Acid Detergent Fibre (ADF) and Non-Fibrous Carbohydrates (NFC) content of chickpea straws were 92.18, 57.80, 37.40 and 22.65%, respectively. The dry matter soluble fraction (a), non-soluble but potentially degradable fraction (b) and potential degradability (a+b) of chickpea straws were 19.50, 38.60 and 58.10%, respectively. Effective degradability at different passage rates (2, 5 and 8% h-1) were 53.70, 48.60 and 44.80%, respectively. Estimated metabolizable energy of chickpea straw was 8.55 MJ kg-1 DM. Based on the DM degradation kinetics and energy content, beseems chickpea straw could be used as a valuable feedstuff in ruminants diet.
  Naser Maheri-Sis , Afshar Mirzaei-Aghsaghali , Amir Reza Safaei , Ali Mirza-Aghazadeh and Ghassem Habibi Bibalani
  The nutritive value of quackgrass (Agropyron repens L.) was evaluated at late maturity. Rumen mixed microbe inoculums were taken from two fistulated Gezel rams. Samples of quackgrass were incubated with rumen fluid to determine gas production. Gas production was measured at 2, 4, 6, 8, 12, 24, 48, 72 and 96 h. The results showed that the Crude Protein (CP), Neutral Detergent Fiber (NDF) and Acid Detergent Fiber (ADF) content of quackgrass hay were 8.9, 69.5 and 38.3%, respectively. Organic Matter Digestibility (OMD) and Metabolizable Energy (ME) content were 43.54% and 6.58 MJ kg1 DM, respectively. In conclusion, it seems that quackgrass could be used as an efficient ruminant feed.
 
 
 
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