hossein manafi rasi; Ali Bayat; hormoz mansouri
Volume 22, Issue 4 , Autumn 2020, , Pages 549-558
Abstract
To determine the effect of mixed thyme and eucalyptus leaves aqueous’ extract on the performance and health of Holstein suckling calves, an experiment using 32 calves (16 females and 16 males) with 7±3 days old and an average weight of 40.4±3 kg was carried out in a completely randomized ...
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To determine the effect of mixed thyme and eucalyptus leaves aqueous’ extract on the performance and health of Holstein suckling calves, an experiment using 32 calves (16 females and 16 males) with 7±3 days old and an average weight of 40.4±3 kg was carried out in a completely randomized design with four treatments and 8 replicate for 70 days. The treatments were: diets with no extract (control); and diets containing10, 15, and 20 ml of extract (50 % thyme + 50% eucalyptus) in consumed milk. In order to evaluate changes in body weight, chest circumference and height, the data were measured and recorded on days 7, 28, 49, and 70 at 10 a.m. To determine the blood parameters, blood samples were taken from the jugular vein on the 70th days. It turned out that the extract can result in a higher mean body weight gain and larger body size (P <0.05). Moreover, thyme and eucalyptus extracts appeared not to have any effect on digestibility and feed intake, but feed efficiency improved with 20 ml (P <0.05). Fecal and eye secretion index in calves receiving diets containing 15 and 20 ml of extract improved compared to the control group (P <0.05). Also, adding 20 ml of the extract reduced the amount of glucose and increased the number of red blood cells and hematocrit in the blood of the receiving calves compared to other experimental groups. The findings indicated that adding 20 ml eucalyptus and thyme extracts in daily milk, can improve the performance and health of Holstein suckling calves
hossein manafi rasi; Hossein Heidary chah baghi; salman Afshar; Narges Afshari pour
Volume 19, Issue 4 , Winter 2018, , Pages 819-828
Abstract
This study was carried out to investigate the effect of Ferulla alliacea resin and wire copper oxide on internal parasite control as well as growth performance of Baluchi fattening lambs. Towenty-five Baluchi lambs, aged 6 to 7 months and weighed 20 ± 5 kg on average, were selected as trial sample. ...
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This study was carried out to investigate the effect of Ferulla alliacea resin and wire copper oxide on internal parasite control as well as growth performance of Baluchi fattening lambs. Towenty-five Baluchi lambs, aged 6 to 7 months and weighed 20 ± 5 kg on average, were selected as trial sample. The experiment was done using completely randomized design with five groups as treatments replicated five times for 60 days. Treatments consisted of 1) control ( without additive), 2) Ferulla alliacea resin, 3) copper oxide wire, 4) combination of copper and Ferulla alliacea resin, 5) albendazole (anti parasite druge). During the experiment period, some parameters such as EPG (the number of eggs per gr of feces) and PCV (hematocrit equivalent) were measured at 0, 15, 30, 45 and 60 day of experiment, as well as weight gain weekly. According to the results, body weight changes were significant in 3th, 4th, 5th and 7th weeks (p<0.05). No significant difference was observed for PCV at all times. In addition, it appeared that copper oxide, Ferulla alliacea resin and albendasole had the same effect on decreasing EPG on 60th d. In addition,. The combination of Ferulla alliacea resin and copper oxide effectively reduced EPG in a shorter time (45th d) . The findings showed that Ferulla alliacea and copper oxide can be used as control of internal parasites in sheep, especially in organic systems.
Hossein Manafi Rasi; Mohammad Chamani; Salman Afshar
Volume 16, Issue 2 , Autumn 2015, , Pages 167-178
Abstract
This study was carried out to determine the potential of rumen microorganisms in samples taken from slaughterhouse to produce fibrolytic enzymes and to compare different methods for extraction, concentration and conservation of them. According to the results, the average specific activity of cellulase ...
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This study was carried out to determine the potential of rumen microorganisms in samples taken from slaughterhouse to produce fibrolytic enzymes and to compare different methods for extraction, concentration and conservation of them. According to the results, the average specific activity of cellulase and xylanase were 7.5 and 16.5 U/mg protein respectively. The application of homogenizing and sonication methods to extract rumen content enzymes showed that the former had better performance in the liberation of enzymes. To determine optimum time length for the maximum release of enzymes from solid phases, various time lengths including one, 1.5 and two min were examined. Based on this experiment, one minute appeared the best. To attain a high level of concentration of enzymes obtained from rumen liquor, various procedures were applied. The results indicate that freeze drying and precipitation of enzyme using ammonium sulphate were the best methods, while trichloroacetic acid precipitation turned out to be the most inappropriate method due to improper effect on enzymatic activity. In order to examine the effect of temperature and time length on enzymes activities, some methods including liquid nitrogen, freezing in -70° and freezing in -20° were applied. The comparison of different methods of enzymes conservation indicated that applying liquid nitrogen for long term as well as keeping in the freezer (-70°) for medium term purposes were the best.