Golnaz Taasoli; Farrokh Kafilzadeh; Darab Ghadimi; Juan Loor; Micheal Ballou
Volume 22, Issue 4 , Autumn 2020, , Pages 529-536
Abstract
The objective of this experiment was to study the effect of diet containing high (40.7 %) non fibrous carbohydrates on some inflammatory and native immunity related genes expression in lactating Jersey cows. Seven lactating multiparous (2.5 ± 0.5) Jersey cows with 71 ± 3 days in milk ...
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The objective of this experiment was to study the effect of diet containing high (40.7 %) non fibrous carbohydrates on some inflammatory and native immunity related genes expression in lactating Jersey cows. Seven lactating multiparous (2.5 ± 0.5) Jersey cows with 71 ± 3 days in milk and 28 ± 6.6 kg of average milk production were used. All cows received a control diet containing low (34.3 percentage of dry matter) non fibrous carbohydrates content for the first 14 days and then were were switched to a diet containing high (40.7 percentage of dry matter) non fibrous carbohydrates content for one week. Blood samples were collected on day 0 (After 14 days of feeding control diet) and days 4 and 7 after feeding high NFC diet. Relative gene expression of seven genes (IL1-β, TNF-α, MNDA, CD74, TLR2, SELECTIN, TGF1-β) were measured. The results showed that gene expression of the pro-inflammatory cytokines (IL1-β and TNF-α) and anti-inflammatory proteins (MNDA, D74, TLR2, SELECTIN, TGF1-β) was down regulated during feeding of high NFC diet (p < 0.05). These data indicated that feeding a high non-fibrous carbohydrates diet caused inflammation and affected immunity system in lactating Jersey cows.
vahid piri; farokh kafilzadeh
Volume 22, Issue 3 , Summer 2020, , Pages 379-389
Abstract
This study was conducted to evaluate the effects of treating ground barley grain with lactic acid (LA) in starter diets on feed intake, average daily gain, feed efficiency, nutrient digestibility, skeletal growth, and blood metabolites of pre-weaneddairy calves. Thirty male Holstein calves with average ...
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This study was conducted to evaluate the effects of treating ground barley grain with lactic acid (LA) in starter diets on feed intake, average daily gain, feed efficiency, nutrient digestibility, skeletal growth, and blood metabolites of pre-weaneddairy calves. Thirty male Holstein calves with average initial body weight of 45.06±2.25 were randomly allocated to one of the 3 treatments. Starter containing 41% ground barley grain from day 4 to 65 of birth. Experimental treatments include: 1) diet containing treated barley in tap water (No LA), 2) diet containing treated barley in 0.5% LA solution, and 3) diet containing treated barley with 1% LA solution. Feed intake was recorded daily. Body weight and skeletal growth measures were recorded on day 4, day 35, and day 56. Calves blood samples were collected on day 4, 35, and 65. Total tract dry matter digestibility and feed efficiency were greater in calves fed diet containing lactic acid treated barley (p < /em> ≤0.05). No effects on dry matter intake, average daily gain, and blood metabolites was observed. At day 35 of the experiment the withers height and body length were greater in calves received LA-treated barely (p < /em> ≤0.05). It seems that treating barley grain with lactic acid decreased starch digestion in the rumen and increased starch flow to the small intestine; accordingly, feed efficiency was improved. Using higher levels of lactic acid may have a positive effect on calf performance.
Reza Naseri Harsini
Volume 19, Issue 2 , Summer 2017, , Pages 349-360
Abstract
Effects of castration of male Morkhoz kids on quality characteristics of biceps femoris muscle and tissues composition of thigh were studied based on a completely randomized design (2 treatments and 4 replicates). Sixteen males were fed for 119 days and kids in the second treatment were castrated one ...
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Effects of castration of male Morkhoz kids on quality characteristics of biceps femoris muscle and tissues composition of thigh were studied based on a completely randomized design (2 treatments and 4 replicates). Sixteen males were fed for 119 days and kids in the second treatment were castrated one week prior to the adaptation period. Results showed that muscularity in the femur region was significantly higher in the control (intact) group (P<0.05). Morkhoz kids castration decreased moisture and increased fat percentages (P<0.05). Castration significantly increased palmitic acid percentage and declined total desirable fatty acids percentage and (C18:0+C18:1)/C16:0 ratio in intramuscular fat of the biceps femoris muscle (P<0.05). Results showed that Morkhoz kids castration, with respect to the amount and composition of fatty acids, wouldn’t be compatible with human health.
Alireza Karampour; Farokh Kafilzadeh
Volume 18, Issue 3 , Autumn 2016, , Pages 491-500
Abstract
This study was conducted to determine the effects of addition of the pomegranate seed oil (PSO) in the diet on growth performance, diet digestibility and rumen fermentation parameters of fattening lambs. Twenty one Sanjabi lambs, with average body weight of 27.5±2.6 kg and 3 months of age, were ...
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This study was conducted to determine the effects of addition of the pomegranate seed oil (PSO) in the diet on growth performance, diet digestibility and rumen fermentation parameters of fattening lambs. Twenty one Sanjabi lambs, with average body weight of 27.5±2.6 kg and 3 months of age, were used in a completely randomized design with 3 treatments and 7 replicates.The experimental treatments included diet free of PSO (control diet), and diets containing 2 and 4% of PSO. Daily feed intake, diet digestibility and rumen fermentation parameters were measured by standard methods. The lambs were weighed at the beginning and the end of the finishing period for estimation of average daily gain (ADG). The DMI in the lambs fed on the diets containing PSO was higher than that of control (P<0.05). There was no differences along treatments concerning ADG, although, in lambs receiving PSO thetrend was to be increased. Dry matter and organic matter digestibility in the lambs fed on 4% PSO were higher than those of the other groups (P<0.05). Concentrations of volatile fatty acids (VFAs) were not affected except valeric acid, however, incorporation of 4% PSO to the diet increased molar percentage of propionic acid and decreased acetate to propionate ratio, significantly. Ammonia nitrogen concentration was not affected by adding PSO to diet. The results of this experiment suggest that pomegranate seed oil has potential to improve the digestibility and ruminal fermentation efficiency of the diet of fattening lambs.
Nader Papi; Farokh Kafilzadeh; Hasan Fazaeli
Volume 17, Issue 2 , Autumn 2015, , Pages 335-345
Abstract
This research was assigned to study the top crop yield potential and nutritive value of Jerusalem artichoke (Helianthus tuberosus), using a completely randomized designed with three treatments and four replications. The forage was cut at three growing stages where plant high, fresh and dry forage yield ...
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This research was assigned to study the top crop yield potential and nutritive value of Jerusalem artichoke (Helianthus tuberosus), using a completely randomized designed with three treatments and four replications. The forage was cut at three growing stages where plant high, fresh and dry forage yield and leave/steam ratio were recorded. First and second cut were made when the plant heights were 100-150 and 150-200 cm, respectively. Forage from the third cut was at the early bloom stage (200-250cm). Then the cuts were chopped and sampled and nutrient contents and in vitro digestibility of the samples were determined. The amount of fresh and dry forage yield were 45.20 and 15.95 (ton/h) in first cut, and 64 and 29.85 (ton/h) in the last cut (flowering stage), respectively. Yield of second cut was significantly higher (p