Somayeh Jalalinia; Farhang Fatehi; Mehdi Dehghan banadaky; Hossein Rokhforoz
Volume 24, Issue 1 , April 2022, , Pages 23-33
Abstract
To investigate the interaction effects between season and dietary forage particle size on milk yield and composition, one hundred early lactating Holstein were allocated. Dietary forage particle size included long (7.7 mm) and fine (4.4 mm), were adjusted as an experimental treatment per season. The ...
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To investigate the interaction effects between season and dietary forage particle size on milk yield and composition, one hundred early lactating Holstein were allocated. Dietary forage particle size included long (7.7 mm) and fine (4.4 mm), were adjusted as an experimental treatment per season. The results showed that raw milk yield, protein, lactose and total solid percentage of milk were higher within spring compared to summer (p< 0.01). Milk yield and milk lactose percentage for cows fed fine forage particle size trended to be higher than cows fed long forage particle size. Also, the amount of dry matter consumed within two hours after feeding for summer was higher than spring. Totally results revealed that cows fed with fine forage particle size had more homogeneous feeding behavior pattern within both studied season than cows fed long forage particle size.
Mohammad Javad Khalifeh; Mohsen Sari; Mehdi Dehghan banadaky
Volume 22, Issue 4 , December 2020, , Pages 537-547
Abstract
This experiment was conducted to study the effects of inclusion of sucrose with or without calcium salts of fish oil on growth performance, ruminal fermentation and blood metabolites of fattening Holstein steers. Thirty sixth Holstein bull calves (269±57 kg body weight and 7 months of age) ...
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This experiment was conducted to study the effects of inclusion of sucrose with or without calcium salts of fish oil on growth performance, ruminal fermentation and blood metabolites of fattening Holstein steers. Thirty sixth Holstein bull calves (269±57 kg body weight and 7 months of age) were used in a completely randomized design with a 2×2 factorial arrangement for 128 days. Dietary treatments were 1- control, 2- calcium salts of fish oil (Ca-FO) (2.5 % DM), 3- sucrose (SU)(5% DM), 4- SU and Ca-FO. Average daily gain increased with added SU (P<0.05). Diets containing Ca-FOreduced dry matter intake (DMI) and using SU and Ca-FO together increased DMI in this group (P<0.05). A tendency for higher organic matter digestibility obsereved in bulls fed Ca-FO (P>0.05). An increase in ruminal acetate concentration observed using Ca-FO in the diet, although Lower propionate and higher acetate concentrations were observed in rumen fluid of SU provided bulls (P<0.05). Addition of SU increased ruminal fluid pH (P<0.05). Feeding steers with Ca-FO increased plasma concentration of triglyceride and cholesterol (P<0.05). The results of this study showed that replacing corn grain with sucrose could have stimulatory effect on dry matter intake in Ca-FO containing diet, which have positive effects on average daily gain of fattening steers.
Hamidreza Pooyan; Armin Towhidi; Mehdi Dehghan banadaky; Mohsen Farzaneh; Jalal Hasan
Volume 22, Issue 2 , June 2020, , Pages 313-324
Abstract
In order to evaluate the effect of bi-partial toxin binder "Biotox" on health status and productive parameters, sixteen Holstein cows were classified into two groups, biotox (supplemented with Biotox) and control (without Biotox). Feed intake, dry matter intake, body weight, body condition ...
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In order to evaluate the effect of bi-partial toxin binder "Biotox" on health status and productive parameters, sixteen Holstein cows were classified into two groups, biotox (supplemented with Biotox) and control (without Biotox). Feed intake, dry matter intake, body weight, body condition score, rectal temperature, respiratory rate, heartbeat, milk yield and compounds and blood parameters were measured and recorded. In control group feed intake, dry matter intake, body weight and body condition score were significantly decreased from forth to seventh week, while rectal temperature, respiratory rate and heartbeat were increased (P≤0.05) during the entire period. The milk yield increased non significantly during the entire period and significantly (P≤0.05) from fifth to seventh week in biotox group. Content of milk protein (P≤0.05) in biotox group and percent of fat (P≤0.05), percent of lactose (P≤0.05), somatic cell count and concentration of aflatoxin M1 (P≤0.05) in control group were increased. Milk solids content in the biotox group increased non-significantly during the entire period andsignificantly in the fifth to seventh week (P≤0.05). There were no significant difference in concentration of plasma glucose, total protein and creatinine during the entire period, but in control group, creatinine level increased during the late period. Plasma aspartate transaminase (P≤0.05) and alanine aminotransferase (P≤0.05) were higher in the control group. Overall, biotox use improves the health, milk production, and production parameters of lactating cows when the feed is exposed to multiple mycotoxin contamination.
Vahab Azimzadeh; Mehdi Dehghan banadaky; armin tohidi; ali assadi-alamouti
Volume 22, Issue 1 , March 2020, , Pages 47-54
Abstract
Effect of different processing methods of corn grain were investigated in 36 Holstein suckling female calves (body weight = 38.2 ± 1.20 kg) on performance and blood and ruminal parameters. Treatments were whole corn, ground corn, cracked corn and steam-flaked corn. Starter diets were ...
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Effect of different processing methods of corn grain were investigated in 36 Holstein suckling female calves (body weight = 38.2 ± 1.20 kg) on performance and blood and ruminal parameters. Treatments were whole corn, ground corn, cracked corn and steam-flaked corn. Starter diets were mixed five percent of the chopped wheat straw and offered to calves from day 4. Milk was fed in a gradual step-up step-down method to all calves. Calves weaned at 71 days and total intake of starter and body weight of calves were measured until 84 days. Starter intake and ADG were significantly higher for cracked corn and steam-flaked corn than for ground corn and whole corn treatments in pre- and post-weaning and overall period (P≤0.01). At weaning and day 84, the average body weight of calves fed cracked corn and steam-flaked corn were significantly higher than those fed whole corn and ground corn treatments (P≤0.01). Treatments also affected serum protein of calves (P<0.05). According results of this study, feeding calves with cracked corn or steam-flaked corn increased feed intake and improved ADG and body weight through pre- and post-weaning periods.
Mehdi Dehghan banadaky; abolfazl zali
Volume 20, Issue 2 , August 2018, , Pages 283-292
Abstract
To evaluate the effect of feeding yeast probiotic in milk or starter on growth, fecal score, health, blood and rumen parameters, 30 female Holstein calves with average 40.4±1.8 kg birth weight in Taliseh Nemouneh dairy farm used from 14 until 65 days old. Calves randomly divided to 3 treatments ...
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To evaluate the effect of feeding yeast probiotic in milk or starter on growth, fecal score, health, blood and rumen parameters, 30 female Holstein calves with average 40.4±1.8 kg birth weight in Taliseh Nemouneh dairy farm used from 14 until 65 days old. Calves randomly divided to 3 treatments including: 1) control (without probiotic) 2) yeast probiotic in starter 3) yeast probiotic in milk. Average daily gain, body weight and feed efficiency were not significantly different between treatments. Dry matter intake was significantly lower in treatment 2 than control (P<0.01). Digestibility of feed nutrients, ammonia nitrogen concentration, rumen fluid pH and blood parameters did not affected by treatments. Fecal score and health in treatment 2 and 3 were better than control. Generally, calves were fed with yeast probiotic in milk had the best fecal score and health
Amirhossein Nasiri; Armin Towhidi; Malek Shakeri; Mehdi Zhandi; Mehdi Dehghan banadaky
Volume 20, Issue 2 , August 2018, , Pages 329-337
Abstract
The insulin resistance and glucose, insulin, IGF-1 metabolism (somatotropic axis performance) were investigated in cows to receive (4 g yeast/d/head) (Probio-Sacc®, BioChem, GmbH, Germany) or not receive live yeast supplement from 21 d before expected date of calving under the hot months of summer ...
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The insulin resistance and glucose, insulin, IGF-1 metabolism (somatotropic axis performance) were investigated in cows to receive (4 g yeast/d/head) (Probio-Sacc®, BioChem, GmbH, Germany) or not receive live yeast supplement from 21 d before expected date of calving under the hot months of summer (THI = 82). Two groups of 6 periparturient Holstein cows were fed a diet without or with 4 g yeast/d/head (15*109 CFU/g) starting 21 d prepartum through 8 weeks postpartum to investigate the changes of blood concentrations of glucose, insulin, IGF-1 and glucose tolerance test (GTT). On d 60 postpartum, greater blood levels of glucose, insulin and insulin-like growth factor I were found in cows receiving yeast supplement than those receiving no yeast (P<0/05). Probiotic had not significant effect on GTT test. Overall, it appears that Probiotics would beneficially improve the blood concentrations of glucose, insulin, IGF-1 in day 60 postpartum (on DFS day) and improve somatotropic axis of dairy cows during the heat stress. Probiosac probiotic had positive effects on somatotropic axis and animal performance. It’s can be a good solution to increase dairy cow’s performance in heat stress condition.